Over 200 million malaria cases and 655,000 deaths occurred globally in 2010 according to WHO estimates. Plasmodium falciparum causes the most severe form of malaria, characterized by high parasitemia levels and life-threatening complications such as cerebral malaria and acute renal failure. The malaria parasite has a complex life cycle involving sexual reproduction in mosquitoes and asexual reproduction in human hosts, causing cyclic fever symptoms. Definitive diagnosis of malaria requires microscopic examination of blood films to identify the plasmodium species. Treatment depends on the identified species, with chloroquine used for chloroquine-sensitive P. falciparum and P. ovale infections.
Medical parasitology : study of parasites that infect human, diseases caused by them, clinical picture, their diagnosis, treatment and prevention as well as controls.
It involves drug development, epidemiological studies and study of zoonoses.
To know various terms related to parasitology.
To know about general parasites and parasitic infections.
To get knowledge about laboratory diagnosis and its importance.
To gain idea about general epidemiological aspects of parasites that affect human.
Apply basic methods of specimen collection , preservation and processing in lab.
To prevent ourselves from these infections and apply control measures.
Medical parasitology : study of parasites that infect human, diseases caused by them, clinical picture, their diagnosis, treatment and prevention as well as controls.
It involves drug development, epidemiological studies and study of zoonoses.
To know various terms related to parasitology.
To know about general parasites and parasitic infections.
To get knowledge about laboratory diagnosis and its importance.
To gain idea about general epidemiological aspects of parasites that affect human.
Apply basic methods of specimen collection , preservation and processing in lab.
To prevent ourselves from these infections and apply control measures.
Malaria:Malaria is a mosquito borne parasitic diseases which is caused by genus Plasmodium and it is characterised by episodes of fever, chills, rigors which occurs typically and periodically every third day.
For long time it was believed that malaria was caused by harmful vapours produced in marshy land.
Charles Laveran, a British military surgeon, for the first time, noticed Plasmodium in the blood of malarial patient, in 1880.
Grassy provided a scientific proof for the specific relationship between Anopheles mosquito and human malarial parasites
Plasmodium:This is an intracellular blood parasites.
For the completion of life cycle they require two hosts, a vertebrate and blood sucking invertebrate.
In man, the infection is due to the inoculation of slender, sickle shaped sporozoite in blood by the bite of an infected female mosquito belonging to the genus Anopheles.
There are 4 species of Plasmodium known to attack man & causing Malaria, P. vivax, P. falciparum, P. malariae, P. ovale.
Life cycle:Following the bite of an infected mosquito the sporozoites are
introduced into the body
2. The parasites first invade the cells of the liver
3. They multiply by the process of schizogony
4. After 6-12 days merozoites are released into the blood
5. The parasites invade the RBC
6. Inside the RBC they continue to multiply and release
merozoites.
7. Some parasites transform into macro and micro gametocytes
which are taken by the mosquitoes.
8. Inside the mosquitoes further multiplication leads to the
production of sporozoites
Clinical Features:The clinical features of malaria are due to the blood stage parasites.
There is fever with rigor, and abdominal pain seen in malaria. Due to rupture of RBC there is anaemia, Mild enlargement of spleen is seen, head ache, myalgia, arthralgia, nausea.
Lab diagnosis:Presence of malarial parasites in the blood confirms the presence of Malaria.
A thickly spread blood film is useful for spotting the
parasites. Thinly spread films help in the accurate identification of the
species. Blood films are stained by Giemsa staining. It is a standard method to diagnosing the Malaria. Giemsa contains a eosin& methylene blue(cytoplasm-blue, nuclear material-red).
Control of malaria:The control measures fall under the following three categories :-
-Treatment of infected patients,
-Prevention of infection,
-Control of vector.
able of ContentsIntroductionObjectives of Giemsa stainPrincipleReagents UsedProcedureStaining procedure 1: Thin Film stainingStaining Procedure 2: Thick Film StainingResultsInterpretation/ConclusionApplications Giemsa stainAdvantagesLimitationsReferencesFour Charged in Plot to Kidnap an Iranian Journalist in New YorkIntroductionGiemsa stain was a name adopted from a Germany Chemist scientist, for his application of a combination of reagents in demonstrating the presence of parasites in malaria.It belongs to a group of stains known as Romanowsky stains. These are neutral stains made up of a mixture of oxidized methylene blue, azure, and Eosin Y and they performed on an air-dried slide that is post-fixed with methanol. Romanowsky stains are applied in the differentiation of cells, pathological examinations of samples like blood and bone marrow films and demonstration of parasites e.g malaria. There are four types of Romanoswsky stains:Giemsa stainJenner StainWright stainMay-Grunwald StainLeishman stainObjectives of Giemsa stainTo accurately prepare the Giemsa stain stock solutionTo stain and identify blood cellsTo differentiate blood cells nuclei from the cytoplasmPrincipleGiemsa stain is a gold standard staining technique that is used for both thin and thick smears to examine blood for malaria parasites, a routine check-up for other blood parasites and to morphologically differentiate the nuclear and cytoplasm of Erythrocytes, leucocytes and Platelets and parasites.Like any type of Romanowsky stains, it composed of both the Acidic and Basic dyes, in relation to affinities of acidity and basicity for blood cells. Azure and methylene blue, a basic dye binds to the acid nucleus producing blue-purple color. Eosin is an acidic dye that is attracted to the cytoplasm and cytoplasmic granules which are alkaline-producing red coloration. The stain must be buffered with water to pH 6.8 or 7.2, to precipitate the dyes to bind simple materials.Classically, Giemsa stain is a differential stain which is made up of a combination of reagents (Azure, Methylene blue, and Eosin dye) used widely in cytogenetics and histopathology for the diagnosis of:Malaria, spirochetes and other blood parasitesChlamydia trachomatis inclusion bodiesBorrelia sppYersinia pestisHistoplasma sppPneumocystis jiroveci cystsReagents UsedMethanolGiemsa powderGlycerinWater (Buffer)ProcedurePreparation of the Giemsa Stain Stock solution (500ml)Into 250ml of methanol, add 3.8g of Giemsa powder and dissolve.Heat the solution up to ~60oCThen, add 250ml of glycerin to the solution, slowly.Filter the solution and leave it to stand for about 1-2 months before use.Preparation of Working solutionAdd 10ml of stock solution to 80ml of distilled water and 10ml of methanolStaining procedure 1: Thin Film stainingOn a clean dry microscopic glass slide, make a thin film of the specimen (blood) and leave to air dry.dip the smear (2-3 dips) into pure methanol for fixation of the
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Model Attribute Check Company Auto PropertyCeline George
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In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
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Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
Malaria
1.
2.
3. Epidemiology
According to estimates from the World Health
Organization, over 200 million cases and about
655.000 deaths have occurred in 2010 due to Malaria.
According to the World Health Organization (WHO)
Malaria Report 2011, a total of 106 countries in the
world are at risk of transmission of malaria infection.
4. Pathogenesis
Malaria caused by Plasmodium falciparum is more
severe than that caused by other plasmodia. It is
characterized by far more red cells than the other
malarial species and by occlusions of capillaries with
aggregates of parasitized red cells.
P. falciparum causes a high level of parasitemia
because it can infect red cells of all ages.
5. This leads to life threatening hemorrhages and
necrosis particularly in the brain further more
extensive hemolysis kidney damage occur which result
in heamoglobinuria. The dark color of the patient’s
urine given rise to the term black water fever. The
hemoglobinuria can lead to acute renal failure.
6. The timing of fever cycle is 48 hours for P. falciparum
as well as P. ovale.
7. The vector and definitive host for plasmodia is the
female Anopheles mosquito (only the female takes a
blood meal). There are two phases in the life cycle: the
sexual cycle, which occurs primarily in mosquitoes,
and the asexual cycle, which occurs in humans, the
intermediate hosts.
8. The sexual cycle is called sporogony because
sporozoites are produced, and the asexual cycle is
called schizogony because schizonts are made.
9. Life Cycle
The life cycle in humans begins with the introduction
of sporozoites into the blood from the saliva of the
biting mosquito. The sporozoites are taken up by
hepatocytes within 30 minutes. This "exoerythrocytic"
phase consists of cell multiplication and
differentiation into merozoites.P. vivax and P. ovale
produce a latent form (hypnozoite) in the liver; this
form is the cause of relapses seen with vivax and ovale
malaria.
10. Merozoites are released from the liver cells and infect
red blood cells. During the erythrocytic phase, the
organism differentiates into a ring-shaped
trophozoite. The ring form grows into an ameboid
form and then differentiates into a schizont filled with
merozoites. After release, the merozoites infect other
erythrocytes. This cycle in the red blood cell repeats at
regular intervals typical for each species. The periodic
release of merozoites causes the typical recurrent
symptoms of chills, fever, and sweats seen in malaria
patients
11. The sexual cycle begins in the human red blood cells
when some merozoites develop into male and others
into female gametocytes.
12. The gametocyte-containing red blood cells are
ingested by the female Anopheles mosquito and,
within her gut, produce a female macrogamete and
eight spermlike male microgametes. After fertilization,
the diploid zygote differentiates into a motile ookinete
that burrows into the gut wall, where it grows into an
oocyst within which many haploid sporozoites are
produced. The sporozoites are released and migrate to
the salivary glands, ready to complete the cycle when
the mosquito takes her next blood meal.
17. Intravascular haemolysis
Black water fever
Metabolic acidosis
Spleenic rupture
In pregnancy
Maternal death, abortion, still birth,low-birth weight.
18. Laboratory Diagnosis
Collection of Blood:-
Blood should be collected s soon as malaria is
suspected(it may be necessary to collect blood on
several occasions to detect the parasites)
Before the patient receives antimalarial drug.
19. Microscopic examination of Blood
Films
Two types of blood films(Thick and thin) are taken. It
is a good practice to take both, the thick and thin
films, at the same time either or same side or on two
different slides so that the parasite may be quickly
detected in thick film and then thin film examined for
identifying the species.
20. Following steps are taken:
I. Thick and thin films are made and allowed to dry.
II. Thick, films are stained with field’s stain and
giemsa’s stain.
III. Films are washed and dried.
IV. Then examined under oil immersion objective lens.
21. If more than 5% of red blood cells are parasitized, the
diagnosis is usually P. falciparum malaria.
22. Red cells:
Crescent shaped.
Banana shaped, Gametocyte with attached Red cell
ghost.
Seen in peripheral blood smear 10 days after infection.
23. Complete blood count
o Haemoglogin Level:-
Low
o Eosinophilia
o ESR
Raised