PROPERTIES OF CORONAVIRUSES,Coronavirus Replication,CORONAVIRUS INFECTIONS IN HUMANS PATHOGENESIS,Clinical Findings,Laboratory Diagnosis,Treatment, Prevention, and Control
Adenoviridae is a group of medium sized, non-enveloped, double stranded DNA viruses that replicate and produce disease in the eye and in the respiratory, gastrointestinal and urinary tracts;
The document discusses the aetiology, pathogenesis, and clinical presentation of COVID-19. It begins by explaining that COVID-19 is caused by SARS-CoV-2, a coronavirus first identified in China in late 2019. SARS-CoV-2 attaches to cells via the ACE2 receptor and causes respiratory illness. It can be transmitted from person to person through respiratory droplets. The document then details the virus structure, modes of transmission, risk factors for severe disease, and the multi-step process of how the virus infects cells and causes illness, including acute respiratory distress syndrome.
This document summarizes information about PolyomaVirus. It notes that PolyomaVirus has a non-enveloped, naked icosahedral capsid around 45nm in diameter that contains a closed circular double-stranded DNA genome. It encodes for viral capsid proteins VP1, VP2, and VP3. Examples given are JC virus which can cause progressive multifocal leukoencephalopathy in immunocompromised individuals, and BK virus which can cause renal disease in transplant patients. Transmission is via respiratory fluids or urine and infection may be asymptomatic or cause fever, with diagnosis via PCR or blood/urine tests. There is no effective treatment without toxicity, only supportive care or immunosuppress
This document summarizes a seminar presentation on astrovirus. Astrovirus are non-enveloped, single-stranded RNA viruses that cause mild gastroenteritis. They have a star-shaped capsid and infect both mammals and birds. Astrovirus infection is diagnosed using RT-PCR or ELISA techniques. Symptoms include diarrhea, nausea, and abdominal pain. Prevention involves proper handwashing, food safety, and sanitation. The presentation covered the epidemiology, structure, replication cycle, pathogenesis, diagnosis, and prevention of astrovirus.
The rhinovirus (from the Greek ῥίς rhis "nose", gen ῥινός rhinos "of the nose", and the Latin vīrus) is the most common viral infectious agent in humans and is the predominant cause of the common cold. Rhinovirus infection proliferates in temperatures of 33–35 °C (91–95 °F), the temperatures found in the nose. Rhinoviruses belong to the genus Enterovirus in the family Picornaviridae.
The three species of rhinovirus (A, B, and C) include around 160 recognized types of human rhinovirus that differ according to their surface proteins (serotypes).[1] They are lytic in nature and are among the smallest viruses, with diameters of about 30 nanometers. By comparison, other viruses, such as smallpox and vaccinia, are around ten times larger at about 300 nanometers; while flu viruses are around 80–120 nm.
Rhinovirus is the most common cause of the common cold. It is a non-enveloped, positive sense RNA virus that primarily infects the upper respiratory tract. Rhinovirus infections are most frequent and widespread during fall and winter. Symptoms include runny nose, sore throat, coughing, sneezing, and body aches. While the common cold is usually self-limiting, complications can occasionally occur such as sinusitis, ear infections, or pneumonia. There is no vaccine or cure for the common cold. Treatment focuses on relieving symptoms through rest, hydration, analgesics, and in some cases decongestants.
Adenoviruses (members of the family Adenoviridae) are medium-sized (90–100 nm), nonenveloped (without an outer lipid bilayer) viruses with an icosahedral nucleocapsid containing a double-stranded DNA genome. Their name derives from their initial isolation from human adenoids in 1953.
The presentation includes disease, treatment and management.
Poxviruses are brick or oval-shaped viruses with large double-stranded DNA genomes. Poxviruses exist throughout the world and cause disease in humans and many other types of animals. Poxvirus infections typically result in the formation of lesions, skin nodules, or disseminated rash.
Adenoviridae is a group of medium sized, non-enveloped, double stranded DNA viruses that replicate and produce disease in the eye and in the respiratory, gastrointestinal and urinary tracts;
The document discusses the aetiology, pathogenesis, and clinical presentation of COVID-19. It begins by explaining that COVID-19 is caused by SARS-CoV-2, a coronavirus first identified in China in late 2019. SARS-CoV-2 attaches to cells via the ACE2 receptor and causes respiratory illness. It can be transmitted from person to person through respiratory droplets. The document then details the virus structure, modes of transmission, risk factors for severe disease, and the multi-step process of how the virus infects cells and causes illness, including acute respiratory distress syndrome.
This document summarizes information about PolyomaVirus. It notes that PolyomaVirus has a non-enveloped, naked icosahedral capsid around 45nm in diameter that contains a closed circular double-stranded DNA genome. It encodes for viral capsid proteins VP1, VP2, and VP3. Examples given are JC virus which can cause progressive multifocal leukoencephalopathy in immunocompromised individuals, and BK virus which can cause renal disease in transplant patients. Transmission is via respiratory fluids or urine and infection may be asymptomatic or cause fever, with diagnosis via PCR or blood/urine tests. There is no effective treatment without toxicity, only supportive care or immunosuppress
This document summarizes a seminar presentation on astrovirus. Astrovirus are non-enveloped, single-stranded RNA viruses that cause mild gastroenteritis. They have a star-shaped capsid and infect both mammals and birds. Astrovirus infection is diagnosed using RT-PCR or ELISA techniques. Symptoms include diarrhea, nausea, and abdominal pain. Prevention involves proper handwashing, food safety, and sanitation. The presentation covered the epidemiology, structure, replication cycle, pathogenesis, diagnosis, and prevention of astrovirus.
The rhinovirus (from the Greek ῥίς rhis "nose", gen ῥινός rhinos "of the nose", and the Latin vīrus) is the most common viral infectious agent in humans and is the predominant cause of the common cold. Rhinovirus infection proliferates in temperatures of 33–35 °C (91–95 °F), the temperatures found in the nose. Rhinoviruses belong to the genus Enterovirus in the family Picornaviridae.
The three species of rhinovirus (A, B, and C) include around 160 recognized types of human rhinovirus that differ according to their surface proteins (serotypes).[1] They are lytic in nature and are among the smallest viruses, with diameters of about 30 nanometers. By comparison, other viruses, such as smallpox and vaccinia, are around ten times larger at about 300 nanometers; while flu viruses are around 80–120 nm.
Rhinovirus is the most common cause of the common cold. It is a non-enveloped, positive sense RNA virus that primarily infects the upper respiratory tract. Rhinovirus infections are most frequent and widespread during fall and winter. Symptoms include runny nose, sore throat, coughing, sneezing, and body aches. While the common cold is usually self-limiting, complications can occasionally occur such as sinusitis, ear infections, or pneumonia. There is no vaccine or cure for the common cold. Treatment focuses on relieving symptoms through rest, hydration, analgesics, and in some cases decongestants.
Adenoviruses (members of the family Adenoviridae) are medium-sized (90–100 nm), nonenveloped (without an outer lipid bilayer) viruses with an icosahedral nucleocapsid containing a double-stranded DNA genome. Their name derives from their initial isolation from human adenoids in 1953.
The presentation includes disease, treatment and management.
Poxviruses are brick or oval-shaped viruses with large double-stranded DNA genomes. Poxviruses exist throughout the world and cause disease in humans and many other types of animals. Poxvirus infections typically result in the formation of lesions, skin nodules, or disseminated rash.
Retroviruses are a family of viruses that contain the enzyme reverse transcriptase which allows their RNA genetic material to be transcribed into DNA. The retrovirus family includes HIV. Retroviruses infect vertebrates and have an envelope containing glycoproteins. Their lifecycle involves transcribing their RNA genome into DNA inside the host cell and integrating that DNA into the host genome. HIV is a lentivirus that causes AIDS in humans. It is approximately 100 nanometers in diameter and has an envelope with spike proteins and a bullet-shaped core containing its two RNA strands and enzyme proteins. The two main types are HIV-1, which is most common worldwide, and HIV-2, which is concentrated in West Africa
Coronaviruses are a family of viruses that cause illness ranging from the common cold to more severe diseases. They are spherical or helical in shape, 80 to 220 nm in diameter, and have positive-sense RNA genomes. Coronaviruses infect humans and other mammals via the respiratory or gastrointestinal tract. Upon cell entry, the viral RNA is translated and replicates to produce structural and accessory proteins which assemble into new virus particles. Major diseases caused by coronaviruses include the common cold and more severe illness such as SARS, MERS and COVID-19.
Adenoviruses were first isolated in 1935 from human tissues. They are double stranded DNA viruses that can cause respiratory, gastrointestinal, and eye infections in humans. While many infections are mild, adenoviruses can cause pneumonia, gastroenteritis, and keratoconjunctivitis. Diagnosis involves isolating the virus from samples using cell culture or molecular techniques. Treatment focuses on symptom relief as there are no specific antivirals, though some drugs like cidofovir are being studied. Prevention emphasizes handwashing, pool chlorination, and infection control practices.
Picornaviruses are a family of small RNA viruses that includes enteroviruses like poliovirus and rhinoviruses that cause the common cold. They are spherical and non-enveloped, around 30nm in diameter, and contain a single strand of positive-sense RNA genome around 7-8kb in size. Picornaviruses infect the cytoplasm and their replication results in cell lysis and spread to other cells. Important human pathogens include the polioviruses, coxsackieviruses, echoviruses and rhinoviruses. Both live attenuated and inactivated vaccines have been developed to prevent diseases like polio.
Rhabdoviruses are a family of viruses that contain negative-stranded RNA and infect vertebrates including humans. They are transmitted primarily through animal bites. The most common rhabdovirus that infects humans is the rabies virus. Rabies virus causes an acute viral infection of the central nervous system that is nearly always fatal if post-exposure prophylaxis is not administered.
Rhinovirus is the most common cause of the common cold, accounting for about half of all cases. It is a non-enveloped virus with a positive-sense RNA genome that primarily infects and replicates in the upper respiratory tract at temperatures between 33-35°C. Rhinovirus binds to ICAM-1 receptors on respiratory cells, triggering an immune response and symptoms like runny nose and cough. There is no vaccine for rhinovirus due to the large number of serotypes, but some antiviral drugs are being researched.
A picornavirus is a virus belonging to the family Picornaviridae, a family of viruses in the order Picornavirales. Vertebrates, including humans, serve as natural hosts. Picornaviruses are nonenveloped viruses that represent a large family of small, cytoplasmic, plus-strand RNA viruses with a 30-nm icosahedral capsid.
Ebola virus is suspected to be zoonotic, transmitted from bats and primates to humans through contact with bodily fluids. It infects macrophages, causing them to release cytokines that produce symptoms like fever and vascular problems. This leads to small blood clots, disruption of coagulation, bleeding, and multi-organ failure. The incubation period is 2-21 days on average. Laboratory diagnosis involves non-specific tests like leukopenia and elevated liver enzymes, as well as specific tests detecting the virus's RNA, proteins, or antibodies.
Poxviruses are a family of large, complex enveloped viruses that contain double-stranded DNA. They include viruses that infect humans and other vertebrates. Smallpox and molluscum contagiosum are human poxviruses, while viruses like vaccinia, cowpox and monkeypox can infect humans incidentally from animal hosts. Poxviruses replicate in the cytoplasm and have complex virion structures. Important human poxviruses include variola (smallpox virus), which was eradicated in the 1970s through vaccination, and molluscum contagiosum, which causes a generally mild skin infection.
Reoviridae is a family of viruses that includes orthoreoviruses, rotaviruses, orbiviruses, and coltiviruses. They are non-enveloped viruses with double-layered protein capsids and segmented double-stranded RNA genomes. Rotaviruses are the most common cause of severe diarrhea in infants and young children worldwide. They replicate in the cytoplasm of intestinal cells. Orbiviruses commonly infect insects and can be transmitted to vertebrates by insects, causing diseases like bluetongue in sheep. While reoviruses are ubiquitous, their role in human disease is unclear.
1. The document discusses two paramyxoviruses: measles and mumps.
2. Measles virus causes a fever and rash that begins on the forehead and spreads to the rest of the body. While measles itself does not directly kill, it can lead to secondary infections like pneumonia that do cause death.
3. Mumps virus causes painful swelling of the parotid glands, making it difficult to chew or swallow. Symptoms last about a week and are generally more severe in individuals past puberty. There is no vaccine for mumps, but it can be treated with ribavirin. Frequent hand washing can help decrease spread of the virus.
Viruses infect host cells and use the host's cellular machinery to replicate themselves. This involves the virus attaching and entering the host cell, releasing its genome, producing new viral components, assembling new virus particles, and causing the host cell to burst and release the new virus particles to infect other cells. Viruses can spread systemically throughout the host's body or remain localized to sites of infection. The replication cycle allows viruses to efficiently propagate and spread infection.
Human Retroviruses are RNA viruses that contain the enzyme reverse transcriptase, allowing them to convert their RNA genome into DNA. The two major genera that affect humans are Lentiviruses, which include HIV-1 and HIV-2, and HTLV-BLV group, which includes HTLV-1 and HTLV-2. HIV binds host cells via gp120, enters via fusion, reverse transcribes into DNA then integrates into the host genome. It replicates using host cell machinery. Infection can lead to AIDS as CD4+ T cells are depleted. Opportunistic infections are treated with antiretrovirals that target reverse transcriptase and protease.
Picornaviruses are a family of small, non-enveloped viruses that includes enteroviruses and rhinoviruses. Enteroviruses such as poliovirus, coxsackievirus, and echovirus can cause diseases ranging from the common cold to meningitis, hand-foot-and-mouth disease, and even paralysis. Poliovirus is classified into three serotypes and can be diagnosed through virus isolation from throat or stool samples or antibody detection in serum. Both injectable inactivated and oral live attenuated vaccines are used to protect against poliovirus. Global vaccination efforts have nearly eradicated polio, with transmission now only occurring in a few countries.
Virology is the study of viruses and their relationship with hosts. Viruses are acellular organisms that can only replicate inside host cells. They have nucleic acid genomes and use host cell machinery to assemble new viral particles. Viruses come in a variety of shapes and sizes, and some have envelopes derived from host cell membranes. They enter host cells, express their genes, replicate their genomes, assemble new viral particles, and exit host cells to infect new targets. Viruses are cultivated using various methods including cell cultures, embryonated eggs, and animal models to study viral replication and pathogenesis.
Viruses are obligate intracellular infectious agents that contain either DNA or RNA as their genome but no organelles. They range in size from 20-400 nm and have a variety of shapes. Viruses consist of a nucleic acid core surrounded by a protein capsid and some have an outer envelope. Their genomes can be single or double stranded and either DNA or RNA. Viruses infect all forms of life including animals, plants, bacteria and archaea.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
The document discusses retroviruses, which are enveloped viruses that contain an RNA genome and the enzyme DNA polymerase. Retroviruses can be transmitted sexually or through blood and cause diseases like AIDS. Examples given are HIV and sarcoma viruses. Prevention methods include safe sex practices, blood screening for HIV, and avoiding sharing needles.
This document discusses Hepadnaviridae, a group of DNA viruses that includes hepatitis viruses. Key points include:
- Hepadnaviridae have an icosahedral nucleocapsid made of protein and a double-stranded DNA genome enclosed in a lipid envelope.
- Hepatitis B virus (HBV) has a circular, partially double-stranded DNA genome that is unusual in organization.
- HBV can be transmitted through bodily fluids and causes symptoms like loss of appetite, nausea, and jaundice. Treatment includes antiviral drugs and vaccines.
RhabdoVirus is a single stranded, linear, negative sense, non-segmented RNA virus that is enveloped and bullet shaped. It multiplies in the cytoplasm. Rabies virus is an example. Rabies virus enters through bites from rabid animals and is carried in the saliva, depositing at the wound site. If untreated, 50% of those exposed will develop rabies as the virus multiplies in muscles, connective tissue and nerves before infecting the central nervous system. Symptoms include headache, fever, sore throat, nervousness, confusion, pain or tingling at the bite site, hallucinations, hydrophobia, paralysis, and eventually coma and death. Diagnosis involves antigen detection
Coronaviruses are large RNA viruses that cause common colds and more severe respiratory illnesses like SARS. They infect the upper respiratory and gastrointestinal tracts of humans and other animals. Coronaviruses have spherical virions with club-shaped spikes and positive-sense RNA genomes. They replicate in the cytoplasm via translation of viral proteins and assembly of new virions which bud off from the ER and Golgi. While difficult to culture, studies of related mouse coronaviruses have revealed their replication mechanisms. Coronaviruses cause respiratory and enteric diseases in humans and livestock and establishing persistent infections in hosts.
Coronaviruses are a large family of respiratory viruses that includes COVID-19MOHAhmed18
Coronaviruses are a large family of respiratory viruses that includes COVID-19, Middle East Respiratory Syndrome (MERS), and Severe Acute Respiratory Syndrome (SARS). Coronaviruses cause diseases in animals and humans. They often circulate among camels, cats, and bats, and can sometimes evolve and infect people.
Retroviruses are a family of viruses that contain the enzyme reverse transcriptase which allows their RNA genetic material to be transcribed into DNA. The retrovirus family includes HIV. Retroviruses infect vertebrates and have an envelope containing glycoproteins. Their lifecycle involves transcribing their RNA genome into DNA inside the host cell and integrating that DNA into the host genome. HIV is a lentivirus that causes AIDS in humans. It is approximately 100 nanometers in diameter and has an envelope with spike proteins and a bullet-shaped core containing its two RNA strands and enzyme proteins. The two main types are HIV-1, which is most common worldwide, and HIV-2, which is concentrated in West Africa
Coronaviruses are a family of viruses that cause illness ranging from the common cold to more severe diseases. They are spherical or helical in shape, 80 to 220 nm in diameter, and have positive-sense RNA genomes. Coronaviruses infect humans and other mammals via the respiratory or gastrointestinal tract. Upon cell entry, the viral RNA is translated and replicates to produce structural and accessory proteins which assemble into new virus particles. Major diseases caused by coronaviruses include the common cold and more severe illness such as SARS, MERS and COVID-19.
Adenoviruses were first isolated in 1935 from human tissues. They are double stranded DNA viruses that can cause respiratory, gastrointestinal, and eye infections in humans. While many infections are mild, adenoviruses can cause pneumonia, gastroenteritis, and keratoconjunctivitis. Diagnosis involves isolating the virus from samples using cell culture or molecular techniques. Treatment focuses on symptom relief as there are no specific antivirals, though some drugs like cidofovir are being studied. Prevention emphasizes handwashing, pool chlorination, and infection control practices.
Picornaviruses are a family of small RNA viruses that includes enteroviruses like poliovirus and rhinoviruses that cause the common cold. They are spherical and non-enveloped, around 30nm in diameter, and contain a single strand of positive-sense RNA genome around 7-8kb in size. Picornaviruses infect the cytoplasm and their replication results in cell lysis and spread to other cells. Important human pathogens include the polioviruses, coxsackieviruses, echoviruses and rhinoviruses. Both live attenuated and inactivated vaccines have been developed to prevent diseases like polio.
Rhabdoviruses are a family of viruses that contain negative-stranded RNA and infect vertebrates including humans. They are transmitted primarily through animal bites. The most common rhabdovirus that infects humans is the rabies virus. Rabies virus causes an acute viral infection of the central nervous system that is nearly always fatal if post-exposure prophylaxis is not administered.
Rhinovirus is the most common cause of the common cold, accounting for about half of all cases. It is a non-enveloped virus with a positive-sense RNA genome that primarily infects and replicates in the upper respiratory tract at temperatures between 33-35°C. Rhinovirus binds to ICAM-1 receptors on respiratory cells, triggering an immune response and symptoms like runny nose and cough. There is no vaccine for rhinovirus due to the large number of serotypes, but some antiviral drugs are being researched.
A picornavirus is a virus belonging to the family Picornaviridae, a family of viruses in the order Picornavirales. Vertebrates, including humans, serve as natural hosts. Picornaviruses are nonenveloped viruses that represent a large family of small, cytoplasmic, plus-strand RNA viruses with a 30-nm icosahedral capsid.
Ebola virus is suspected to be zoonotic, transmitted from bats and primates to humans through contact with bodily fluids. It infects macrophages, causing them to release cytokines that produce symptoms like fever and vascular problems. This leads to small blood clots, disruption of coagulation, bleeding, and multi-organ failure. The incubation period is 2-21 days on average. Laboratory diagnosis involves non-specific tests like leukopenia and elevated liver enzymes, as well as specific tests detecting the virus's RNA, proteins, or antibodies.
Poxviruses are a family of large, complex enveloped viruses that contain double-stranded DNA. They include viruses that infect humans and other vertebrates. Smallpox and molluscum contagiosum are human poxviruses, while viruses like vaccinia, cowpox and monkeypox can infect humans incidentally from animal hosts. Poxviruses replicate in the cytoplasm and have complex virion structures. Important human poxviruses include variola (smallpox virus), which was eradicated in the 1970s through vaccination, and molluscum contagiosum, which causes a generally mild skin infection.
Reoviridae is a family of viruses that includes orthoreoviruses, rotaviruses, orbiviruses, and coltiviruses. They are non-enveloped viruses with double-layered protein capsids and segmented double-stranded RNA genomes. Rotaviruses are the most common cause of severe diarrhea in infants and young children worldwide. They replicate in the cytoplasm of intestinal cells. Orbiviruses commonly infect insects and can be transmitted to vertebrates by insects, causing diseases like bluetongue in sheep. While reoviruses are ubiquitous, their role in human disease is unclear.
1. The document discusses two paramyxoviruses: measles and mumps.
2. Measles virus causes a fever and rash that begins on the forehead and spreads to the rest of the body. While measles itself does not directly kill, it can lead to secondary infections like pneumonia that do cause death.
3. Mumps virus causes painful swelling of the parotid glands, making it difficult to chew or swallow. Symptoms last about a week and are generally more severe in individuals past puberty. There is no vaccine for mumps, but it can be treated with ribavirin. Frequent hand washing can help decrease spread of the virus.
Viruses infect host cells and use the host's cellular machinery to replicate themselves. This involves the virus attaching and entering the host cell, releasing its genome, producing new viral components, assembling new virus particles, and causing the host cell to burst and release the new virus particles to infect other cells. Viruses can spread systemically throughout the host's body or remain localized to sites of infection. The replication cycle allows viruses to efficiently propagate and spread infection.
Human Retroviruses are RNA viruses that contain the enzyme reverse transcriptase, allowing them to convert their RNA genome into DNA. The two major genera that affect humans are Lentiviruses, which include HIV-1 and HIV-2, and HTLV-BLV group, which includes HTLV-1 and HTLV-2. HIV binds host cells via gp120, enters via fusion, reverse transcribes into DNA then integrates into the host genome. It replicates using host cell machinery. Infection can lead to AIDS as CD4+ T cells are depleted. Opportunistic infections are treated with antiretrovirals that target reverse transcriptase and protease.
Picornaviruses are a family of small, non-enveloped viruses that includes enteroviruses and rhinoviruses. Enteroviruses such as poliovirus, coxsackievirus, and echovirus can cause diseases ranging from the common cold to meningitis, hand-foot-and-mouth disease, and even paralysis. Poliovirus is classified into three serotypes and can be diagnosed through virus isolation from throat or stool samples or antibody detection in serum. Both injectable inactivated and oral live attenuated vaccines are used to protect against poliovirus. Global vaccination efforts have nearly eradicated polio, with transmission now only occurring in a few countries.
Virology is the study of viruses and their relationship with hosts. Viruses are acellular organisms that can only replicate inside host cells. They have nucleic acid genomes and use host cell machinery to assemble new viral particles. Viruses come in a variety of shapes and sizes, and some have envelopes derived from host cell membranes. They enter host cells, express their genes, replicate their genomes, assemble new viral particles, and exit host cells to infect new targets. Viruses are cultivated using various methods including cell cultures, embryonated eggs, and animal models to study viral replication and pathogenesis.
Viruses are obligate intracellular infectious agents that contain either DNA or RNA as their genome but no organelles. They range in size from 20-400 nm and have a variety of shapes. Viruses consist of a nucleic acid core surrounded by a protein capsid and some have an outer envelope. Their genomes can be single or double stranded and either DNA or RNA. Viruses infect all forms of life including animals, plants, bacteria and archaea.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
The document discusses retroviruses, which are enveloped viruses that contain an RNA genome and the enzyme DNA polymerase. Retroviruses can be transmitted sexually or through blood and cause diseases like AIDS. Examples given are HIV and sarcoma viruses. Prevention methods include safe sex practices, blood screening for HIV, and avoiding sharing needles.
This document discusses Hepadnaviridae, a group of DNA viruses that includes hepatitis viruses. Key points include:
- Hepadnaviridae have an icosahedral nucleocapsid made of protein and a double-stranded DNA genome enclosed in a lipid envelope.
- Hepatitis B virus (HBV) has a circular, partially double-stranded DNA genome that is unusual in organization.
- HBV can be transmitted through bodily fluids and causes symptoms like loss of appetite, nausea, and jaundice. Treatment includes antiviral drugs and vaccines.
RhabdoVirus is a single stranded, linear, negative sense, non-segmented RNA virus that is enveloped and bullet shaped. It multiplies in the cytoplasm. Rabies virus is an example. Rabies virus enters through bites from rabid animals and is carried in the saliva, depositing at the wound site. If untreated, 50% of those exposed will develop rabies as the virus multiplies in muscles, connective tissue and nerves before infecting the central nervous system. Symptoms include headache, fever, sore throat, nervousness, confusion, pain or tingling at the bite site, hallucinations, hydrophobia, paralysis, and eventually coma and death. Diagnosis involves antigen detection
Coronaviruses are large RNA viruses that cause common colds and more severe respiratory illnesses like SARS. They infect the upper respiratory and gastrointestinal tracts of humans and other animals. Coronaviruses have spherical virions with club-shaped spikes and positive-sense RNA genomes. They replicate in the cytoplasm via translation of viral proteins and assembly of new virions which bud off from the ER and Golgi. While difficult to culture, studies of related mouse coronaviruses have revealed their replication mechanisms. Coronaviruses cause respiratory and enteric diseases in humans and livestock and establishing persistent infections in hosts.
Coronaviruses are a large family of respiratory viruses that includes COVID-19MOHAhmed18
Coronaviruses are a large family of respiratory viruses that includes COVID-19, Middle East Respiratory Syndrome (MERS), and Severe Acute Respiratory Syndrome (SARS). Coronaviruses cause diseases in animals and humans. They often circulate among camels, cats, and bats, and can sometimes evolve and infect people.
This document discusses coronaviruses that cause disease in humans, including SARS, MERS, and COVID-19. It notes that SARS-CoV and MERS-CoV are zoonotic viruses that originated in animals like bats and camels before infecting humans. COVID-19 was first identified in Wuhan, China in 2019 and has since spread globally. While SARS-CoV-2 is genetically similar to coronaviruses that cause SARS and MERS, it appears to cause milder infections and spreads more easily between people than SARS and MERS did. The reproductive number of SARS-CoV-2 is estimated to be higher than SARS and MERS, indicating a greater pandemic potential.
Coronaviruses & COVID 19 - Its Morphology, Role, Mechanism of Action, and Tre...Haider Ali Malik
This document discusses COVID-19 and coronaviruses. It defines COVID-19 as a novel coronavirus first identified in Wuhan, China in late 2019. Coronaviruses are a large family of viruses that can cause illnesses ranging from the common cold to more severe diseases like MERS and SARS. The document then provides details on the structure, replication, and transmission of coronaviruses, symptoms of COVID-19, the ongoing global pandemic, and the discovery and identification of SARS-CoV-2 under electron microscopy.
Coronaviruses are a family of viruses that can cause mild to moderate upper-respiratory tract illnesses like the common cold in humans. They are spherical or pleomorphic enveloped viruses with spike proteins that give them a crown-like appearance. Two common human coronaviruses are HCoV-229E and HCoV-OC43 which enter cells via different receptors and differ antigenically. Coronaviruses infect respiratory epithelial cells, causing cell damage and inflammation leading to cold symptoms. While treatment is symptomatic, hygienic measures can reduce transmission.
This document presents a brief study on COVID-19 conducted by Subhasmith Pradhan, a final year pharmacy student. It summarizes the microbiology, morphology, classification, replication cycle, pathogenesis, clinical symptoms, laboratory diagnosis, treatment and prevention of COVID-19. Key points include that COVID-19 is caused by SARS-CoV-2, a newly discovered coronavirus. It spreads via respiratory droplets and can cause mild to severe respiratory illness. Diagnosis involves PCR or antigen testing of respiratory samples. While there is no proven treatment, research focuses on drugs like remdesivir and prevention relies on isolation, quarantine, hand washing and masks.
Pseudorabies is an acute, frequently fatal disease with a worldwide distribution that affects swine primarily and other domestic and wild animals incidentally. The pseudorabies virus has emerged as a significant pathogen in the USA since the 1960s, probably because of the increase in confinement swine housing or perhaps because of the emergence of more virulent strains. Clinical signs in nonporcine animals are similar to those of rabies, hence the name “mad itch” (pigs do not display this sign). Pseudorabies is a reportable disease and has been successfully eradicated from the vast majority of the USA.
Poxviruses are a family of viruses that can infect both vertebrates and invertebrates. The most notable member is the smallpox virus. Four genera may infect humans, including orthopox (which includes smallpox, cowpox, and monkeypox viruses) and molluscipox (which causes molluscum contagiosum). Poxviruses have complex brick-shaped particles that contain double-stranded DNA and replicate in the cytoplasm of infected cells. Notable human infections include cowpox, molluscum contagiosum, monkeypox, and smallpox.
1) Coronaviruses were first identified in 1965 and can infect birds and mammals. They derive their name from crown-like spikes on their surface.
2) A new coronavirus emerged from Wuhan, China called 2019-nCoV which has spread rapidly worldwide, killing many people. It causes respiratory illness and pneumonia.
3) Coronaviruses can be transmitted between humans in rare cases, as with 2019-nCoV, in a process called zoonosis. More research is needed to treat and prevent infection from these viruses.
This document provides information on COVID-19, including:
1) It describes the clinical presentation of COVID-19 including dry cough, fever, and shortness of breath.
2) It explains that COVID-19 was first reported in Wuhan, China in December 2019 and was declared a pandemic by the WHO on March 11, 2020.
3) It discusses the virus taxonomy, noting it is an enveloped, positive sense single stranded RNA betacoronavirus that primarily infects the respiratory system via the ACE2 receptor.
This document provides information about viruses that cause upper respiratory tract infections, including adenoviruses, coronaviruses, and rhinoviruses. It discusses the structure, properties, replication cycles, clinical manifestations, and treatments associated with each virus. Adenoviruses are non-enveloped DNA viruses that cause respiratory, eye, digestive, and urinary tract infections. Coronaviruses are pleomorphic RNA viruses that cause 10-20% of common colds and also SARS and MERS. Rhinoviruses are small RNA viruses with over 150 serotypes that are the leading cause of the common cold and can exacerbate respiratory conditions.
Arboviruses, or arthropod-borne viruses, are viruses that can be transmitted to humans by arthropod vectors such as mosquitoes and ticks. They infect susceptible vertebrate hosts and are maintained in nature through transmission between hosts by hematophagous arthropods. Approximately 80 arboviruses are known to cause human disease. Common arboviruses include those that cause dengue, yellow fever, Japanese encephalitis, West Nile fever, and chikungunya. They are often associated with diseases ranging from mild febrile illness to severe encephalitis or hemorrhagic fever. Arboviruses are classified into families including Togaviridae, Flavivir
Coronaviruses are a family of viruses that cause disease in animals. Seven, including the new virus, have made the jump to humans, but most just cause cold-like symptoms.
Two other coronaviruses – Middle East respiratory syndrome (Mers) and severe acute respiratory syndrome (Sars) – are much more severe,
Coronaviruses are a group of viruses that can infect both animals and humans. The novel coronavirus (SARS-CoV-2) that causes COVID-19 is threatening global health. Coronaviruses can cause respiratory illnesses like pneumonia and breathing difficulties in severe cases. While coronaviruses are dangerous, research has shown some may have potential medical value in destroying tumor cells. Scientists around the world are working to better detect and treat SARS-CoV-2 through more accurate testing and efficient treatments.
Middle East Respiratory Syndrome (MERS)Mayuri Rani
Middle East Respiratory Syndrome Coronavirus (MERS-CoV) is a novel coronavirus that was first identified in Saudi Arabia in 2012. Coronaviruses are enveloped viruses with positive-sense RNA genomes that derive their name from the crown-like appearance of viral spike proteins on their surface. MERS-CoV is classified within the Betacoronavirus genus and is closely related to bat coronaviruses. Camels are believed to be the primary animal reservoir, with limited human-to-human transmission occurring, mainly in healthcare settings. Clinical presentation ranges from asymptomatic to severe pneumonia and multi-organ failure. There is currently no vaccine available for MERS-CoV.
Coronaviruses are a family of viruses that can cause illnesses ranging from the common cold to more severe diseases. They are classified as enveloped viruses with a positive-sense single-stranded RNA genome. Most coronaviruses first infect epithelial cells in the respiratory or enteric tract. Laboratory diagnosis of coronavirus infections can be done through direct detection of antibodies, detection of viral RNA via RT-PCR from respiratory samples, or virus isolation in cell culture. Treatment is primarily focused on relieving symptoms, and prevention involves maintaining good hand hygiene and avoiding contact with those exhibiting symptoms.
Relationship between SARS CoV, MERS CoV and COVID19.SumitSingh1135
The document discusses the phylogenetic relationship between SARS CoV1, MERS CoV, and SARS CoV2 based on their spike proteins. It provides information on coronaviruses in general and describes the three virus types - SARS CoV, MERS CoV, and SARS CoV2. For each virus type, it discusses symptoms, transmission, prevention, and their respective spike protein sequences. It also briefly discusses COVID-19 vaccines such as Covaxin, Pfizer, and Moderna.
This document summarizes information about COVID-19. It describes how COVID-19 was first reported in Wuhan, China in December 2019 and was later declared a pandemic by the WHO. The virus is a betacoronavirus that uses the ACE2 receptor and can cause respiratory symptoms like cough and fever as well as bilateral lung infiltrates. While most cases are mild, mortality rates vary from 2-10% depending on location. The virus spreads through droplets and contaminated surfaces.
This document discusses diabetes mellitus, including its causes, types, and symptoms. There are two main causes of diabetes: either the pancreas does not produce enough insulin or the body's cells do not respond properly to insulin. The two main types are type 1, where the pancreas does not produce insulin at all, and type 2, where the pancreas does not produce enough insulin or the body is resistant to it. Symptoms include frequent urination, increased thirst and hunger, weight loss, and vision changes. Gestational diabetes occurs during pregnancy when blood sugar levels become elevated.
This document discusses different types of inflammation and conditions that can affect the female and male breasts. It describes 4 main types of inflammation in females: acute mastitis which occurs during lactation; periductal mastitis which involves squamous metaplasia of the nipple ducts and is more common in smokers; mammary duct ectasia which causes painless lumps and nipple secretions in older women; and fat necrosis which appears as lumps associated with trauma or surgery. It also outlines gynecomastia and carcinoma as conditions that can affect the male breast. Gynecomastia involves breast enlargement related to hormone imbalances, while male breast cancer has strong associations with BRCA2 mutations.
This document summarizes various antiviral drugs, including their mechanism of action, route of administration, approved uses, and common side effects. It covers nucleoside analog inhibitors such as acyclovir and famciclovir used to treat herpes viruses, as well as non-nucleoside inhibitors like foscarnet used for CMV retinitis. Anti-influenza agents like oseltamivir and zanamivir that are neuraminidase inhibitors are also discussed. Finally, it lists several classes of antiretroviral drugs and examples used to treat HIV/AIDS.
Immunization is a key strategy for child survival and protection from diseases. The process of immunization stimulates the immune system through antigens from vaccines. It leads to immunity against pathogens but without causing severe infection. Immunization lowers morbidity and mortality in children through techniques like vaccination. Herd immunity occurs when a large percentage of a population is immune, indirectly protecting those who are not immune by disrupting chains of infection. Haptens are small molecules that are antigenic but not immunogenic on their own and require coupling to carrier proteins to induce an immune response.
The internal carotid artery has 7 segments from its origin at the common carotid artery bifurcation to where it enters the cranium. Each segment has unique anatomic features and branches. The segments are named cervical, petrous, lacerum, cavernous, clinoid, ophthalmic, and communicating. The petrous, cavernous, and ophthalmic segments each have important branches including the vidian artery, meningohypophyseal trunk, and ophthalmic artery respectively.
The document summarizes the anatomy of the eye. It describes the three coats that make up the eyeball from outward to inward: the fibrous coat, vascular pigmented coat, and nervous coat. It then provides details on the structures that comprise each coat, including the sclera, cornea, choroid, ciliary body, iris, retina, aqueous humor, vitreous body, and lens. It explains the function of each structure and how they work together to allow vision.
The document summarizes the anatomy of the eye. It describes the three coats that make up the eyeball from outward to inward: the fibrous coat, vascular pigmented coat, and nervous coat. It then provides details on the structures that comprise each coat, including the sclera, cornea, choroid, ciliary body, iris, retina, aqueous humor, vitreous body, and lens. It explains the function of each structure and how they work together to allow vision.
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Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
Local Advanced Lung Cancer: Artificial Intelligence, Synergetics, Complex Sys...Oleg Kshivets
Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more than 5 years without cancer (LS=2958.6±1723.6 days), 22 – more than 10 years (LS=5571±1841.8 days). 67 LCP died because of LC (LS=471.9±344 days). AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0-N12, T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells-CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and N0-12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC (5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct prediction of 5YS was 100% by neural networks computing (error=0.000; area under ROC curve=1.0).
Integrating Ayurveda into Parkinson’s Management: A Holistic ApproachAyurveda ForAll
Explore the benefits of combining Ayurveda with conventional Parkinson's treatments. Learn how a holistic approach can manage symptoms, enhance well-being, and balance body energies. Discover the steps to safely integrate Ayurvedic practices into your Parkinson’s care plan, including expert guidance on diet, herbal remedies, and lifestyle modifications.
Rasamanikya is a excellent preparation in the field of Rasashastra, it is used in various Kushtha Roga, Shwasa, Vicharchika, Bhagandara, Vatarakta, and Phiranga Roga. In this article Preparation& Comparative analytical profile for both Formulationon i.e Rasamanikya prepared by Kushmanda swarasa & Churnodhaka Shodita Haratala. The study aims to provide insights into the comparative efficacy and analytical aspects of these formulations for enhanced therapeutic outcomes.
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8 Surprising Reasons To Meditate 40 Minutes A Day That Can Change Your Life.pptxHolistified Wellness
We’re talking about Vedic Meditation, a form of meditation that has been around for at least 5,000 years. Back then, the people who lived in the Indus Valley, now known as India and Pakistan, practised meditation as a fundamental part of daily life. This knowledge that has given us yoga and Ayurveda, was known as Veda, hence the name Vedic. And though there are some written records, the practice has been passed down verbally from generation to generation.
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NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
2. Coronaviruses are large, enveloped RNA viruses
The human coronaviruses cause common colds, may cause lower
respiratory tract infections, and have been implicated in gastroenteritis
in infants.
A novel coronavirus was identified as the cause of a worldwide
outbreak of a severe acute respiratory syndrome (SARS) in 2003
Animal coronaviruses cause diseases of economic importance in
domestic animals.
Coronaviruses of lower animals establish persistent infections in their
natural hosts.
The human viruses are difficult to culture and therefore are more
poorly characterized.
3. Human coronavirus OC43. Note the characteristic
large, widely spaced spikes that form a “corona”
around the virion
4. Virion: Spherical, 120–160 nm in diameter, helical nucleocapsid
genome: Single-stranded RNA, linear, non - segmented, positive-
sense,27–32 kb, capped and polyadenylated, infectious
Proteins: Two glycoproteins and one phosphoprotein. Some viruses
contain a third glycoprotein (hemagglutinin esterase)
envelope: Contains large, widely spaced, club- or petal-shaped spikes
Replication: Cytoplasm; particles mature by budding into endoplasmic
reticulum and Golgi
Outstanding characteristics:
Cause colds and SARS
Display high frequency of recombination
Difficult to grow in cell culture
5. Human coronaviruses do not grow well in cell culture , details of viral
replication have come from studies with mouse hepatitis virus, which is
closely related to human strain OC43.
The replication cycle takes place in the cytoplasm of cells.
entry to the cell the virus particle is uncoated and the RNA genome is
deposited into the cytoplasm.
Coronavirus have single positive strand RNA genome, they can directly
produce their protein and new genome in the cytoplasm.
The Coronavirus genome has a 5’ methylated cap and a
3’polyadenylated tail. This allows the RNA to attach to ribosomes for
translation.
6. The protein N binds genomic RNA and the protein M is
integrated into the membrane of the endoplasmic
reticular(ER), protein S after binding, assembled nucleo-
capsids with helical twisted RNA budding into the ER
lumen and are encased with membrane.
These viral progeny are finally transported by Golgi
vesicles to the cell membrane and exocytosis.
8. Coronaviruses primarily infect the upper respiratory and
gastrointestinal tract.
SARS coronavirus also infects epithelial cells lining salivary gland
ducts (shown in monkeys).
Coronavirus infections in humans usually, but not always, remain
limited to the upper respiratory tract.
SARS serious respiratory illness, including pneumonia and progressive
respiratory failure.
Virus can also be detected in other organs, including kidney, liver, and
small intestine , and in stool.
9. The SARS virus probably originated in a nonhuman host, most likely
bats, was amplified in palm civets, and was transmitted to humans in
live animal markets.
Coronaviruses are suspected of causing some gastroenteritis in humans
10. Produce “colds,” usually afebrile , in adults.
The symptoms are similar to those produced by rhinoviruses, typified
by nasal discharge and malaise.
Incubation period is from 2 to 5 days, and symptoms usually last about
1 week.
SARS coronavirus causes severe respiratory disease.
The incubation period averages about 6 days.
symptoms include fever, malaise, chills, headache, dizziness, cough,
and sore throat, followed a few days later by shortness of breath.
12. no proven treatment for coronavirus infections and no
vaccine.
Protease inhibitors used in the treatment of human
immunodeficiency virus infections (eg, lopinavir) have in
vitro activity against SARS coronavirus.
SARS vaccines are under development
13. Control measures that were effective in stopping the
spread of SARS included isolation of patients, quarantine
of those who had been exposed, and travel restrictions.
Use of gloves, gowns, goggles, and respirators by health
care workers.