1. Cerebral malaria is the most serious complication of falciparum malaria and is caused by plugging of brain capillaries by parasitized red blood cells, leading to vascular occlusion. Other complications include pernicious malaria, blackwater fever, algid malaria, acidosis, anemia, hypoglycemia, and renal failure.
2. Chronic complications include tropical splenomegaly syndrome and quartan malaria nephropathy, which is a nephrotic syndrome caused by immune complex deposition in the kidneys.
3. Treatment of malaria involves use of antimalarial drugs with various objectives like therapeutic cure, radical cure to prevent relapse, and gametocidal effects to prevent transmission. Dr
This presentation includes definition, epidemiology, etiology, pathophysiology (life cycle), diagnosis, clinical features of uncomplicated & severe malaria and treatment of malaria.
This presentation includes definition, epidemiology, etiology, pathophysiology (life cycle), diagnosis, clinical features of uncomplicated & severe malaria and treatment of malaria.
Introduction, epidemiology, global trends, Indian setting, pathogenesis, life cycle, clinical manifestations, investigations, treatment regimen, prevention.
Protozoan parasites characterized by the production of spore-like oocysts containing sporozoites were known as sporozoa.
They live intracellularly, at least during part of their life cycle
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Contains Videos in two slides. So try using Power Point 2010.
My email : doc.sarathrs@gmail.com
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Introduction, epidemiology, global trends, Indian setting, pathogenesis, life cycle, clinical manifestations, investigations, treatment regimen, prevention.
Protozoan parasites characterized by the production of spore-like oocysts containing sporozoites were known as sporozoa.
They live intracellularly, at least during part of their life cycle
An infection is the invasion of an organism's body tissues by disease causing agents, their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce. An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection.
Malaria(Plasmodium falciparum)- Epidemiology, Life Cycle, Prevention and Erad...Sarath
Malaria(Plasmodium falciparum)- Epidemiology, Life Cycle, Prevention and Eradication.
Contains Videos in two slides. So try using Power Point 2010.
My email : doc.sarathrs@gmail.com
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
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Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
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2. COMPLICATIONS OF FALCIPARUM MALARIA
1. Cerebral malaria- Most serious complication of
falciparum malaria.
Due to plugging of brain capillaries by the
sequestered parasitized RBC leading to vascular
occlusion.
2. Pernicious malaria- It is characterized by
■ Algid malaria
■ Septicemic malaria
■ Black water fever
3. 3. Black water fever-
Characterized by intravascular hemolysis followed
by fever, hemoglobinuria and dark urine.
4. Algid Malaria- Characterized by cold clammy skin
, hypotension, peripheral circulatory failure and
profound shock.
5. Acidosis- Due to accumulation of organic acids
like lactic acid.
5. CHRONIC COMPLICATIONS OF
MALARIA
1. Tropical splenomegaly syndrome - Also
known as hyperactive malaria splenomegaly.
Results from an abnormal immunologic
response to repeated malaria infections and
is characterized by elevated IgM.
6. 2. Quartan malaria nephropathy- It is a
chronic complication seen with P. malaria.
Occurs due to injury to renal glomeruli by
the immune complexes , resulting in
nephrotic syndrome.
7. Treatment of malaria
Anti-malarial drugs are used with various objectives –
Therapeutic – to eradicate the erythrocytic cycle
Radial cure – to eradicate the exo-erythrocytic cycle to prevent relapse
Gametocidal – to destroy gametocytes to prevent mosquito transmission
Chemoprophylaxis – to prevent infection in non-immune person visiting endemic
areas
8. Uncomplicated malaria
Positive for - P. ovale, P. vivax and P. malariae
Primaquine – to prevent relapse
In case of chloroquine resistance – Quinine
is given – 8 hourly for 7 days plus
doxycycline 100mg/day.
Complicated(falciparum) malaria
Artemisinin based combination therapy
(ACT) is given
Monotherapy with Artemisinin is banned
in India as it promotes resistance.
10. Anti-malarial drug Resistance
A drug resistant parasite will survive and multiply in a dosage that normally cures the
infection.
Resistance arises from spontaneous point mutations in the genome or gene
duplications.
3 levels of resistance are defined by WHO –
Following treatment,
1. R1 – parasitemia clears but recrudescence occurs
2. R2 – reduction but not a clearance of parasitemia
3. R3 – no reduction of parasitemia
Many strains of P.F. are MDR meaning as resistance to atleast 3 or more than 3 classes
of anti-malarial drugs.
Only sporadic cases of resistance to chloroquine/primaquine have been reported in
vivax malaria.
11. Factors that contribute to emergence of resistance –
1. longer half-life of drug
2. mutation in parasite gene
3. inadequate and irregular usage of drug
4. host immunity
Mechanism of drug resistance –
1. chloroquine resistance in P.F. – mutations in genes encoding for– PfCRT and PfMDR1
– result in impaired transport of chloroquine
2. Resistance to antifolates - like pyrimethamine – due to point mutation in DHFR gene
3. Resistance to artemisinin – not been reported yet, observed in experimental animals
12. WHO guidelines for assessing degree of resistance –
In-vivo methods – resistance assessed on 2 factors – persistence of clinical
manifestations, level of parasitemia
In-vitro tests –
1. WHO micro test – RPMI 1640 medium
2. ELISA – measurement of HRP-2 or pLDH
3. PCR – detect P.F. specific drug resistance genes
Prophylaxis against malaria
1. Chemoprophylaxis – travelers, migrant laborers, military personnel
(a) Short term – Doxycycline, 100mg/day, 2 days before and 4 weeks after
(b) Long term – Mefloquine, 5mg/kg weekly, 2 weeks before, during, 4 weeks after
13. 2. Vector control strategies –
(a) Anti-adult measures –
Residual spraying – DDT, malathion, fenitrothion
Space application- by ultra low volume method of pesticide dispersion
Individual protection – insecticide treated bed nets, repellents, protective clothing
(b) Anti-larval measures –
Larvicide – mineral oil or paris green
Source reduction – reduce mosquito breeding sites
Biological larvicide – Gambusia affinis(fish), Bacillus thuringiensis(bacteria)
3. Vaccination – till date no vaccine is licensed for human use
RTS, S/AS01 – only vaccine – used in children in sub-Saharan africa
14. 1. Malaria is endemic in many countries and is reported to be a
leading cause of death from parasitic infection killing millions
of people globally, with the most number of deaths occurring
in Africa.
Which of the following age group of people are at higher
risk?
a) 10 - 15 years of age
b) > 5 years of age
c) < 40 years of age
d) 10- 25 years of age
15. 2.Which of the following Plasmodium spp is considered
to be the major parasite that leads to leading cause of
human deaths throughout the world annually?
• a) Plasmodium knowlesi
• b) Plasmodium malariae
• c) Plasmodium falciparum
• d) Plasmodium vivax
16. 3.Trophozoites, schizonts, and gametocytes of all the malarial
parasites are seen in the peripheral blood smear except;
a. P. Falciparum
b. P. Malariae
c. P. Ovale
d. P. vivax
17. 4. A thin blood smear is used as a specimen for the microscopic
detection of Plasmodia.
Which of the following dyes/stain is used for the identification?
A) Lactophenol cotton blue
b) Giemsa stain
c) Safranin
d) Crystal violet
18. 5.Which is the infective form of the malaria parasite?
a. Oocyst
b. Sporozoite
c. Bradyzoite
d. Tachyzoite
19. 6.Crescent-shaped or banana-shaped gametocytes are seen in infection
with:
a. Plasmodium vivax
b. Plasmodium falciparum
c. Plasmodium ovale
d. Plasmodium malariae
20. 7.Blackwater fever is a special manifestation of malaria caused by;
a. P. Falciparum
b. P. Malariae
c. P. Ovale
d. P. Vivax
21. 8.Name the organ in which the malarial parasite could reside and stay
dormant for up to one year during the transmission of the disease in
humans
a) Kidney
b) Liver
c) Intestines
d) Gall’s bladder
22. 9.Which of the following is the most common type of symptom that
occur in people infected with malaria?
A) Muscle aches and low-grade fever
b) Skin rashes and swollen legs and hands
c) Mouth rashes and itchy skin
d) High-grade fever and chills
23. • 10. Which of the following is the one morphological characteristics
that distinguish P. Vivax and
• P. Ovale from other human malaria parasites?
• A) Maurer’s dots
• b) Schuffner’s dots
• c) Ring stages
• d) Banana shaped gametocytes
24. 11.All types of malaria have flu-like symptoms, after a few days of
infection the individuals could experience periodic febrile attacks, also
known as malarial paroxysms.
Which of the following statements regarding malarial paroxysm is Not
correct?
A) It has three stages, hot, cold, and sweating stages
b) It lasts for about 8 to 12 hours
c) It happens when the RBCs release sporozoites in the blood
d) It is usually 72 hours for P. Malariae and 48 hours for other human
Plasmodium spp
25. 12.Which of the following Plasmodium spp is responsible for the
highest mortality rate annually around the world?
A) P. Knowlesi
b) P. Falciparum
c) P. Malariae
d) P. vivax
26. 13. All of the following statements regarding Plasmodium falciparum
infection are true, Except?
A) P. Falciparum, falciparum name is derived from sickle-shaped
gametocytes
b) Malaria caused by P. Falciparum is also known as “malignant tertian
malaria”
c) It causes severe infections and is known to be the most fatal of all
human malaria
d) Schuffner’s dots are developed and can be observed during
microscopic examination
27. 14.When the sporozoites enter the human blood, they are carried to
the liver where they replicate and develop into merozoites. The
merozoites are released into the blood and the parasites invade RBCs.
Which of the following statements is Not true regarding the
developmental phase of Plasmodia inside the RBCs?
A) The phase is known as the erythrocytic phase of malaria
b)The merozoites go through asexual reproduction
c) The phase lasts for two to three days
d)The merozoites go through sexual reproduction and develop into a
zygote
28. 15.A 7-year-old girl from a malaria-endemic region visited the hospital with fever,
chills, aches, and fatigue. The blood smear method (thick and thin blood smear)
was performed for the microscopic examination, and the intracellular parasite and
its stages were identified, the girl was diagnosed with malaria.
Which of the following statements regarding the general characteristics of
Plasmodium spp is Not correct?
A) There are five known species of Plasmodium that cause infections in human
b) The parasite containing sporozoites are released into the blood via the mosquito
c) The sexual reproduction is completed in mosquitoes whereas asexual in human
RBCs
d) The infection can lead to liver and spleen enlargement
29. 16.All of the following statements regarding recurrent malaria (relapse,
recrudescence, and reinfection) are correct, Except?
A) Some patients develop malaria again after a period of time
b) Recrudescence is due to insufficient treatment, relapse is due to the
reappearance of merozoites from hypnozoites
c) It can be seen in all Plasmodium spp causing malaria
d) The highest rate of relapses occurs with malaria caused by P. vivax
30. 17..Which of the following Plasmodia has general features related to P.
Vivax and infections similar to that caused by P. Falciparum?
A) P. Knowlesi
b) P. Ovale
c) P. Malariae
d) None of the above
31. 18.When the sporozoites enter the human blood, they are carried to
the liver where they replicate and develop into merozoites. The
merozoites are released into the blood and the parasites invade RBCs.
Which of the following statements is Not true regarding the
developmental phase of Plasmodia inside the RBCs?
A) The phase is known as the erythrocytic phase of malaria
b)The merozoites go through asexual reproduction
c) The phase lasts for two to three days
d)The merozoites go through sexual reproduction and develop into a
zygote
32. 19.Malaria drug hydroxychloroquine was falsely reported to be
effective in which type of viral infection in 2020?
A) Dengue
b) Influenza
c) COVID-19
d) Swine flu
33. 20.Of the following statements regarding recurrent malaria (relapse,
recrudescence, and reinfection) are correct, Except?
A) Some patients develop malaria again after a period of time
b) Recrudescence is due to insufficient treatment, relapse is due to the
reappearance of merozoites from hypnozoites
c) It can be seen in all Plasmodium spp causing malaria
d) The highest rate of relapses occurs with malaria caused by P. vivax