MCQ in Parasitology:Malaria life cycle, pathogenesis and diagnosis

January 11, 2013 Acharya Tankeshwar MCQ Parasitology, Parasitology, USMLE Microbiology Practice Questions 15
You can try these mentioned Multiple Choice Questions (MCQs) regarding malaria disease and post the right answers as comments. I will post right answer later.
MCQ Malaria 1. 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
 Answer: a. (Plasmodium falciparum)
Explanation: Schizogony occurs inside the capillaries of the internal organs (spleen, liver and Bone marrow) hence only the ring form (but not the growing trophozoites and schizonts) are found in the peripheral blood
MCQ Malaria 2. Black water fever is a special manifestation of malaria caused by;
a. P. falciparum
b. P. malariae
c. P. ovale
d. P. vivax 
Answer: a. P. falciparum
Explanation: Blackwater fever (BWF) is a severe clinical syndrome, characterized by intravascular hemolysis, hemoglobinuria (with passage of black urine), and acute renal failure caused by a variety of factors in patients with P. falciparum infestation.
MCQ Malaria 3. After sporozoite gain entrance to human body it undergoes developmental cycle first in liver than in RBC, only after which fever is seen. This incubation period varies between plasmodium species, and ………….. species has longest incubation period.
a. P. falciparum
b. P. malariae
c. P. ovale
d. P. vivax
Answer: b (P. malariae)

Explanation: Benign quartan  (with a fever every 3rd day) malaria is caused P malariae whereas Benign tertian (with a fever every 2nd day) is caused by P vivax and P ovale  and Malignant tertian  is caused by P falciparum.

MCQ Malaria 4. Which of the following statement(s) regarding Plasmodium falciparum are true?

a. causes more severe disease in pregnancy
b. is associated with recurrent relapses after initial treatment because of liver hypnozoites
c. is the only malarial parasite causing greater than 20% parasitaemia
d. infection is typically associated with thrombocytopenia
e. is the only cause of cerebral malaria
Answer: Options a, c and d are correct. 
Explanation:  Hypnozoite is responsible for relapse of malaria in P. vivax and P. ovale infections.Plasmodium falciparum and Plasmodium malariae do not have a dormant liver stage. Usually cerebral malaria is caused by P. falciparum, and rarely, cerebral malaria occurs during the course of P. vivax infection.
MCQ Malaria 5. Mosquitoes is/are the vector in the following disorder(s)
a. Onchocerciasis
b. Visceral leishmaniasis
c. African trypanosomiasis
d. Bancroftian filariasis
Answer:  d (Bancroftian filariasis)
Explanation: Vector of Onchocerciasis is blackfly (Simulium damnosum) whereas that of Visceral leishmaniasis is Sand Fly (Phlebotomus argentipus). Trypanosomiasis is transmitted by a blood sucking insect, tsetse fly.
MCQ Malaria 6. Which of the following statement(s) regarding vivax malaria is (are) true
a. may be complicated by anaemia
b. may be complicated by jaundice
c. in a traveller may present more than six months after exposure
d. is sensitive to chloroquine
e. may co-exist with falciparum malaria in the same patient

Test your understanding in Parasitology. Try our dedicated MCQ Quiz section for Parasitology. 
About Acharya Tankeshwar 452 Articles
Hello, thank you for visiting my blog. I am Tankeshwar Acharya. Blogging is my passion. I am working as an Asst. Professor and Microbiologist at Department of Microbiology and Immunology, Patan Academy of Health Sciences, Nepal. If you want me to write about any posts that you found confusing/difficult, please mention in the comments below.

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15 Comments

  12. Qn.in malaria disease there is the decrease in blood glucose level(hypoglycemia).so explain how plasmodium parasite cause this condition?

    Reply

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