MEDICAL PARASITOLOGY ACTUA UESTIONS AND

MEDICAL PARASITOLOGY ACTUA UESTIONS AND

ANSWERS WITH CORRECT VERIFIED SOLUTIONS.

⫸ Diagnostic method for Schistosoma. Answer: Stool exam for eggs

⫸ Blood fluke species endemic in the Philippines. Answer: Schistosoma japonicum

⫸ Protozoan with variant surface proteins. Answer: Giardia lamblia

⫸ Parasite with suppressor factor for monocytes. Answer: Entamoeba histolytica

⫸ Egg-laying site of Enterobius. Answer: Perianal folds

⫸ Common symptom of Enterobiasis. Answer: Perianal itching

⫸ Protozoan with non-motile environmental stage. Answer: Cyst

⫸ Helminths with operculated eggs. Answer: Trematodes

⫸ Helminths with segmented body. Answer: Cestodes

⫸ Flatworm that competes for vitamin B12. Answer: Diphyllobothrium latum

⫸ Parasitic worm without body cavity. Answer: Flatworm (Platyhelminthes)

⫸ Protozoan with jerky motion. Answer: Trichomonas vaginalis

⫸ Protozoan that is both tissue and blood parasite. Answer: Trypanosoma cruzi

⫸ Parasite linked to mega disease symptoms. Answer: Trypanosoma cruzi 1 / 4

⫸ Protozoan not found in environmental reservoirs. Answer: Trichomonas vaginalis

⫸ Parasite not forming cysts, only trophozoites. Answer: Trichomonas vaginalis

⫸ Route of transmission of Giardia, Entamoeba. Answer: Fecal-oral

⫸ Protozoan diagnosed using vaginal wet mount. Answer: Trichomonas vaginalis

⫸ Type of parasite capable of autoinfection. Answer: Strongyloides stercoralis

⫸ Protozoan with four flagellar pairs and suction disc. Answer: Giardia lamblia

⫸Commensalism. Answer: A biological relationship where one organism benefits and the other is neither harmed nor helped.

⫸ Mutualism. Answer: A biological relationship where both organisms benefit.

⫸ Parasitism. Answer: A relationship where one organism benefits at the expense of another.

⫸ Phoresy. Answer: A type of symbiosis used for transport.

⫸ Inquilism. Answer: A type of symbiosis used for housing/shelter.

⫸ Endoparasite. Answer: A parasite that lives inside the host's body.

⫸ Ectoparasite. Answer: A parasite that lives outside the host's body.

⫸ Obligate parasite. Answer: A parasite that requires a host at some life stage.

⫸ Facultative parasite. Answer: A parasite that can live freely but becomes parasitic when needed. 2 / 4

⫸ Definitive host. Answer: Host where the parasite reaches sexual maturity.

⫸ Intermediate host. Answer: Host where the parasite undergoes larval or asexual development.

⫸ Paratenic host. Answer: Host that helps maintain the life cycle without development of the parasite.

⫸ Reservoir host. Answer: Host that harbors the parasite and can transmit infection to humans.

⫸ Autoinfection. Answer: Infection where the person infects themselves with the same parasite.

⫸ Hyperinfection / Superinfection. Answer: A condition where a person is further infected with the same parasite species.

⫸ Enzymatic interference. Answer: Parasite method of digesting host tissues using cysteine proteases.⫸ Cyst. Answer: Non-motile, thick-walled, and environmentally resistant protozoan form.

⫸ Flagellated forms. Answer: Flagellated protozoan forms like promastigotes or trypomastigotes.

⫸ Non-flagellated forms. Answer: Non-flagellated protozoan forms like amastigotes.

⫸ Entamoeba histolytica. Answer: Protozoan with pseudopodia and ingests red blood cells.

⫸ Giardia lamblia. Answer: Flagellated protozoan with falling leaf motility.

⫸ Balantidium coli. Answer: Only ciliated protozoan that infects humans.

⫸ Trichomonas vaginalis. Answer: Flagellated protozoan with jerky movement and no cyst form.

⫸ Entamoeba histolytica. Answer: Most invasive Entamoeba species. 3 / 4

⫸ Entamoeba histolytica. Answer: Trophozoite with ingested RBCs (hematophagous).

⫸ Giardia lamblia. Answer: Protozoan with adhesive disc and four pairs of flagella.

⫸ Giardia lamblia. Answer: Protozoan causing malabsorption and duodenal inflammation.

⫸ Balantidium coli. Answer: Largest protozoan parasite of humans.

⫸ Balantidium coli. Answer: Protozoan associated with pigs and slaughterhouse workers.

⫸ Trichomonas vaginalis. Answer: Protozoan that exists only as trophozoite and causes ping-pong infections.

⫸ Plasmodium species. Answer: Protozoan with ring forms seen in RBCs during diagnosis.

⫸ Plasmodium species. Answer: Protozoan that causes malaria.

⫸ Sporozoite. Answer: Infective stage of Plasmodium.

⫸ Trophozoite (ring form). Answer: Diagnostic stage of Plasmodium.

⫸ Plasmodium species. Answer: Protozoan whose virulence results from RBC destruction and splenic congestion.

⫸ Partial immunity. Answer: Protective condition caused by G6PD deficiency and sickle cell trait against Plasmodium

⫸ Premunition. Answer: Immunity that limits Plasmodium parasitemia and symptoms

⫸ Plasmodium falciparum. Answer: Buzzword: infected RBCs with 1-2 chromatin dots

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