Parasitology and Disease Transmission Quiz

Entamoeba histolytica trophozoite is a stage of the parasite responsible for causing amoebiasis. Plasmodium falciparum merozoite is a stage of the parasite that causes malaria. Trypanosoma cruzi trypomastigote is a stage of the parasite that causes Chagas disease. Giardia lamblia cyst is a stage of the parasite responsible for causing giardiasis.

Entamoeba histolytica is a parasitic amoeba that commonly causes dysentery, diarrhea, and the presence of bloody and mucoid stools. It does not cause malaria, common cold, or food poisoning.

Entamoeba histolytica is primarily transmitted through ingestion of contaminated food or water, not through the air, direct skin contact, or sharing utensils.

Balantidium coli is a ciliated protozoan parasite known to infect the colon of humans and other animals. It is characterized by its trophozoite form during the active growth phase.

Balantidium Coli is a parasitic bacteria that infects the colon, leading to severe diarrheal disease and dysentery. It does not cause symptoms like the common cold, skin rash, or headache.

Balantidium Coli is a parasitic protozoan that is typically acquired through the ingestion of contaminated food or water. It is not transmitted through the air, via person-to-person contact, or by touching contaminated surfaces.

Giardia lamblia trophozoite is a flagellated protozoan parasite known to cause giardiasis in humans.

Giardia lamblia trophozoite is a microscopic parasite responsible for causing diarrheal disease in humans. It is commonly transmitted through contaminated water or food.

Giardia lamblia trophozoites are acquired through ingestion of contaminated food or water, not through respiratory droplets, direct skin contact, or infected blood.

The image shows a Giardia lamblia cyst, which is a common intestinal parasite that can cause gastrointestinal illness in humans.

Trichomonas vaginalis trophozoite is a protozoan parasite that causes the sexually transmitted infection trichomoniasis. It is important to differentiate it from bacterial, yeast, and other parasite species commonly found in various infections.

Trichomonas vaginalis trophozoite is a parasitic protozoan that causes trichomoniasis, a sexually transmitted infection. Plasmodium falciparum is a parasite that causes malaria. Escherichia coli is a bacterium commonly found in the intestines. Candida albicans is a fungus that can cause yeast infections.

Trichomonas vaginalis trophozoite specifically causes vaginitis in women and is usually symptomless in men. The incorrect answers provided do not accurately describe the effects of this protozoan parasite.

Trichomonas vaginalis trophozoite is primarily transmitted through sexual contact, making it a sexually transmitted infection (STI).

The correct answer refers to the characteristic features of Plasmodium species during different stages of its life cycle, including ring and mature trophozoites.

Plasmodium spp. ring and mature trophozoites cause malaria, a life-threatening disease transmitted through the bite of infected female Anopheles mosquitoes. Malaria is characterized by fever, chills, and flu-like symptoms.

Malaria is caused by Plasmodium spp. and is primarily transmitted through the bite of an infected mosquito. Ring and mature trophozoites are stages in the life cycle of Plasmodium within the human host, which are not transmitted directly through contaminated water, contact with an infected person, or airborne transmission.

The correct answer is Toxoplasma gondii trophozoite, which is a single-celled parasite that causes toxoplasmosis in humans. Staphylococcus aureus is a bacterium, Escherichia coli is a bacterium, and Plasmodium falciparum is a protozoa, none of which are the correct organism in question.

Toxoplasma gondii trophozoite can cause fatigue and muscle aches, as well as infect a fetus across the placenta leading to severe consequences like stillbirth, liver, or brain damage.

Toxoplasma gondii trophozoite is typically obtained through fluid contamination, placenta infection, cysts, or oocysts. It is not acquired through airborne transmission, direct skin contact, or sexual intercourse.

The image depicts a Clonorchis sinensis egg, a parasitic flatworm commonly found in the bile ducts of humans and other fish-eating mammals.

Clonorchis sinensis eggs are acquired through the consumption of undercooked infected fish, as the eggs develop in the liver of the fish.

The correct answer is Schistosoma mansoni egg, it can be distinguished by its characteristic lateral spine.

Schistosoma mansoni egg causes symptoms primarily related to the gastrointestinal system such as bloody diarrhea, abdominal pain and lethargy.

Schistosoma mansoni eggs are obtained through the infection via contact with fecally contaminated water containing juveniles of the species, not through consuming raw meat, breathing in airborne particles, or direct contact with an infected person's blood or bodily fluids.

Echinococcus granulosus is a parasitic tapeworm that typically infects the liver and lungs of various mammalian hosts, including humans. It is transmitted through the ingestion of contaminated food or water containing the parasite's eggs.

Echinoccoccus granulosus causes hydatid disease, which is a parasitic infection that forms cysts in various organs of the body.

Echinococcus granulosus is usually obtained by ingesting the juvenile form of the parasite, not through respiratory droplets, skin contact, or contaminated water sources.

The correct answer is Taenia spp. egg, which is a type of tapeworm. Roundworm, tapeworm, and hookworm are all different types of parasites commonly found in the intestines of animals, but Taenia spp. specifically refers to the tapeworm genus.