Q.1 Which parasite is responsible for causing malaria in humans?
Trypanosoma brucei
Plasmodium falciparum
Entamoeba histolytica
Giardia lamblia
Explanation - Plasmodium falciparum is the most severe species causing malaria, transmitted by Anopheles mosquitoes.
Correct answer is: Plasmodium falciparum
Q.2 What is the primary vector for Trypanosoma brucei?
Anopheles mosquito
Tsetse fly
Ixodes tick
Sandfly
Explanation - Trypanosoma brucei, which causes African sleeping sickness, is transmitted by the Tsetse fly.
Correct answer is: Tsetse fly
Q.3 Which protozoan parasite causes amoebic dysentery?
Giardia lamblia
Plasmodium vivax
Entamoeba histolytica
Leishmania donovani
Explanation - Entamoeba histolytica infects the large intestine, causing dysentery and sometimes liver abscesses.
Correct answer is: Entamoeba histolytica
Q.4 Which parasitic infection is commonly transmitted through contaminated water containing cysts?
Giardiasis
Malaria
Leishmaniasis
Schistosomiasis
Explanation - Giardia lamblia cysts in contaminated water can infect the small intestine, causing diarrhea and malabsorption.
Correct answer is: Giardiasis
Q.5 Schistosomiasis is caused by which type of parasite?
Nematode
Trematode
Cestode
Protozoa
Explanation - Schistosoma species are blood flukes (trematodes) causing schistosomiasis, transmitted through freshwater snails.
Correct answer is: Trematode
Q.6 Which stage of Plasmodium is injected into humans by mosquitoes?
Merozoite
Sporozoite
Trophozoite
Gametocyte
Explanation - An infected Anopheles mosquito injects sporozoites into the human bloodstream, initiating malaria infection.
Correct answer is: Sporozoite
Q.7 Which parasite causes Chagas disease?
Leishmania tropica
Trypanosoma cruzi
Plasmodium malariae
Entamoeba histolytica
Explanation - Trypanosoma cruzi is transmitted by triatomine bugs and causes Chagas disease, common in Latin America.
Correct answer is: Trypanosoma cruzi
Q.8 What is the common clinical feature of intestinal tapeworm infection?
Severe headache
Weight loss and abdominal discomfort
Hematuria
Skin rash
Explanation - Tapeworms like Taenia species attach to the intestine and absorb nutrients, causing mild gastrointestinal symptoms and weight loss.
Correct answer is: Weight loss and abdominal discomfort
Q.9 Which parasitic infection is transmitted by the bite of an infected sandfly?
Leishmaniasis
Filariasis
Malaria
Giardiasis
Explanation - Leishmania species are transmitted by sandflies and can cause cutaneous or visceral leishmaniasis.
Correct answer is: Leishmaniasis
Q.10 Which nematode is known to cause lymphatic filariasis?
Wuchereria bancrofti
Ascaris lumbricoides
Enterobius vermicularis
Trichinella spiralis
Explanation - Wuchereria bancrofti is a filarial worm transmitted by mosquitoes, causing lymphatic obstruction and elephantiasis.
Correct answer is: Wuchereria bancrofti
Q.11 Which parasite forms cysts in the brain and muscles leading to cysticercosis?
Taenia solium
Schistosoma mansoni
Giardia lamblia
Plasmodium falciparum
Explanation - The larval stage of Taenia solium can invade tissues, causing cysticercosis in the brain, muscles, and other organs.
Correct answer is: Taenia solium
Q.12 Which diagnostic test is commonly used for detecting malaria parasites?
Blood smear microscopy
Stool examination
Urine antigen test
X-ray imaging
Explanation - Blood smear microscopy allows direct visualization of Plasmodium parasites in red blood cells and remains the gold standard for malaria diagnosis.
Correct answer is: Blood smear microscopy
Q.13 Which of the following is a common symptom of giardiasis?
Jaundice
Chronic diarrhea
Hemoptysis
Skin lesions
Explanation - Giardiasis causes prolonged diarrhea, bloating, and malabsorption due to Giardia lamblia infection of the small intestine.
Correct answer is: Chronic diarrhea
Q.14 Which parasite is known for causing river blindness?
Onchocerca volvulus
Wuchereria bancrofti
Schistosoma haematobium
Leishmania donovani
Explanation - Onchocerca volvulus, transmitted by blackflies, causes onchocerciasis, leading to skin changes and blindness.
Correct answer is: Onchocerca volvulus
Q.15 Which organ is primarily affected by Entamoeba histolytica?
Liver
Small intestine
Large intestine
Kidney
Explanation - Entamoeba histolytica primarily invades the colon, causing ulceration and diarrhea; it can also occasionally spread to the liver.
Correct answer is: Large intestine
Q.16 Which parasite is transmitted through ingestion of undercooked pork?
Taenia solium
Taenia saginata
Schistosoma japonicum
Giardia lamblia
Explanation - Consumption of undercooked pork containing cysticerci of Taenia solium can cause intestinal infection or cysticercosis.
Correct answer is: Taenia solium
Q.17 Which vector transmits Plasmodium species that cause malaria?
Culex mosquito
Anopheles mosquito
Aedes mosquito
Tsetse fly
Explanation - Malaria is transmitted to humans by female Anopheles mosquitoes infected with Plasmodium sporozoites.
Correct answer is: Anopheles mosquito
Q.18 Which parasite causes cutaneous leishmaniasis?
Leishmania tropica
Plasmodium vivax
Entamoeba histolytica
Trypanosoma cruzi
Explanation - Leishmania tropica infects skin macrophages, causing localized ulcers and lesions at the bite site.
Correct answer is: Leishmania tropica
Q.19 Which nematode infection is diagnosed by detecting eggs in stool samples?
Ascaris lumbricoides
Wuchereria bancrofti
Onchocerca volvulus
Plasmodium falciparum
Explanation - Ascaris lumbricoides eggs are shed in feces and are identified under a microscope for diagnosis.
Correct answer is: Ascaris lumbricoides
Q.20 Which parasite causes visceral leishmaniasis (kala-azar)?
Leishmania donovani
Leishmania tropica
Plasmodium falciparum
Trypanosoma brucei
Explanation - Leishmania donovani infects internal organs like the spleen, liver, and bone marrow, leading to kala-azar.
Correct answer is: Leishmania donovani
Q.21 Which parasite is associated with the 'swimmer's itch' or cercarial dermatitis?
Schistosoma species
Plasmodium species
Giardia lamblia
Taenia solium
Explanation - Schistosoma cercariae can penetrate the skin during contact with infested water, causing an itchy rash.
Correct answer is: Schistosoma species
Q.22 Which blood-borne parasite is detected using a Giemsa-stained blood smear?
Plasmodium
Entamoeba histolytica
Giardia lamblia
Taenia solium
Explanation - Giemsa staining allows visualization of Plasmodium parasites in red blood cells for malaria diagnosis.
Correct answer is: Plasmodium
Q.23 Which nematode is known to cause trichinosis?
Trichinella spiralis
Ascaris lumbricoides
Wuchereria bancrofti
Enterobius vermicularis
Explanation - Trichinella spiralis larvae encyst in muscle tissue after ingestion of undercooked meat, leading to trichinosis.
Correct answer is: Trichinella spiralis
Q.24 Which parasite can cause both intestinal infection and neurocysticercosis?
Taenia solium
Taenia saginata
Giardia lamblia
Plasmodium falciparum
Explanation - Ingestion of Taenia solium eggs can lead to cysticercosis affecting the brain (neurocysticercosis) or intestines.
Correct answer is: Taenia solium
Q.25 Which parasitic infection is prevented by proper sanitation and hand hygiene?
Giardiasis
Malaria
Leishmaniasis
Filariasis
Explanation - Giardiasis is transmitted via the fecal-oral route; good hygiene and safe water reduce infection risk.
Correct answer is: Giardiasis