30 Questions
What is the common habitat of the adult worms of Wuchereria bancrofti?
Lymphatics of lower limbs, groin and epididymes in males
What is the vector responsible for transmitting Leishmaniasis in the Old World?
Female sand fly, genus Phlebotomus
In which age group is Leishmania donovani commonly found?
Between 10-25 years
What is the stage of the parasite responsible for transmission of Wuchereria bancrofti?
Microfilaria
What is the common manifestation of Wuchereria bancrofti infection in the lymphatics?
Elephantiasis
Which of the following species of Plasmodium is found in subtropical zones?
Plasmodium malariae
Which type of cells does P.ovale and P.vivax infect in the liver?
Reticulocytes
What is the characteristic of the tail of the male worm in the adult stage of P.malaria?
Curved ventrally
What is the characteristic of the microfilaria stage of the parasite?
Body has a loose sheath and graceful curves
Which stage of the parasite is infective to humans?
Filariform larvae
What is the mode of transmission of Leishmania?
Bite of infected female sand fly
What is the characteristic of the anterior end of the microfilaria stage?
Rounded and free from nuclei
What is the term given to the period from the entry of sporozoites in the liver to the invasion of RBCs by merozoites?
Parasitic incubation period
What is the stage of the parasite when it feeds on the haemoglobin of the RBC?
Trophozoite stage
What is the number of nucleus pieces that the trophozoite divides into?
6-36
What is the function of the promastigotes in the sand fly?
To block the sucking apparatus
What happens to the parasitized RBCs after the completion of a few schizogony cycles?
They rupture and release merozoites
What is the fate of some merozoites after completing a few schizogony cycles?
They do not develop into schizonts but instead form male gametes
What is the site where the cycle of sporogony takes place in the vector?
Stomach of the female Anopheles mosquito
What are the parasite stages responsible for transmission of infection to the definitive host vector?
Gametocytes
What is the result of the immunological reaction in the symptomatic stage of the disease?
Recurrent attacks of lymphanginitis and lymphadenitis
What happens to the parasite stages when the vector takes its blood meal?
All ingested parasite stages are digested
What is the duration of the incubation period?
From the entry of the third stage infective larvae into the skin until the microfilariae first appear in the blood
What is the characteristic of the affected lymph vessels in the inflammatory stage?
They appear as raised, red, hot, swollen, and tender streaks
What is the characteristic sign seen in ultrasonography during the diagnosis of filariasis?
Filarial dance sign
What is the time frame for taking a blood sample to detect microfilariae in peripheral blood?
Between 10 pm and 2 am
What is the purpose of the provocative test in the diagnosis of filariasis?
To facilitate the detection of microfilariae in blood when it is difficult to obtain a sample at night
What is the name of the test used to detect antibodies in the diagnosis of filariasis?
All of the above
What is the characteristic feature of nodules in filariasis?
They never ulcerate
What is the repeating pattern of the malarial paroxysm in P. falciparum?
Irregular
Test your knowledge on parasitic diseases such as malaria, visceral leishmaniasis, and filariasis, including their causes, geographical distribution, and vectors of transmission. Explore the world of parasites and their impact on human health. Get ready to diagnose and defeat these diseases!
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