Microscopic Identification of Parasites: Protozoans and Helminths Quiz

Ascaris lumbricoides ova is commonly known as round worm and is a type of parasitic worm that infects the intestines of humans. Trichinella spiralis is a worm that causes trichinosis when ingested through undercooked meat. Taenia solium is a tapeworm transmitted through contaminated food. Enterobius vermicularis is a common intestinal parasite known as pinworm.

Balantidium coli is a ciliate protozoan that can exist in the cyst form. The incorrect answers provided belong to different types of protozoa, such as flagellates, amoebas, and sporozoans, making them unrelated to Balantidium coli cyst.

The correct identification for Blastocystis hominis is 'Blastocystis hominis cyst-like'. The other options do not match the characteristics of Blastocystis hominis.

Endolimax nana cysts are a common type of parasitic cyst found in human feces. Amebic ulcer, Ascaris lumbricoides egg, and Schistosoma haematobium egg are all incorrect as they represent different types of parasites or eggs that are not the same as Endolimax nana cyst.

Endolimax nana troph is the correct identification for the given specimen. Ancylostoma stercoralis adult, Giardia lamblia cyst, and Entamoeba histolytica cyst are different organisms that can be found in fecal samples, making them incorrect choices.

The correct answer is Entamoeba histolytica troph, as it is a specific form of the parasite responsible for causing amoebiasis in humans.

The correct answer is Giardia lamblia (intestinalis) troph. This organism is commonly associated with gastrointestinal infections in humans. Plasmodium falciparum, Entamoeba histolytica, and Cryptosporidium parvum are other parasites that cause different types of diseases.

Blastocystis hominis cyst-like has a unique appearance that can be distinguished from the other organisms mentioned.

Hymenolepis diminuta ova are the ova of a tapeworm species commonly found in rats, but can also infect humans as accidental hosts. Ascaris lumbricoides, Taenia solium, and Trichuris trichiura are different types of parasites with distinct ova morphology.

The correct answer is Diphyllobothrium latum ova. Mycobacterium tuberculosis, Staphylococcus aureus, and Ascaris lumbricoides are all different organisms and not to be confused with Diphyllobothrium latum ova.

Enterobius vermicularis larvae, commonly known as pin worm, are small, white, thread-like worms that infect the intestines of humans. They are typically found near the rectal area and are a common cause of infections in children.

Enterobius vermicularis ova are the characteristic eggs of the pinworm, a parasitic infection commonly found in children. Ascaris lumbricoides, Trichuris trichiura, and Taenia solium are eggs of other intestinal parasites and not associated with Enterobius vermicularis.

Hymenolepis nana ova refers to the eggs of the tapeworm Hymenolepis nana, which is the correct identification when encountered in a clinical setting.

The correct identification for this sample is an Entamoeba coli cyst. Entamoeba coli is a non-pathogenic amoeba that can be found in the human colon. Giardia lamblia trophozoites are pear-shaped protozoa that cause giardiasis. Ascaris lumbricoides eggs are roundworm eggs that can cause ascariasis. Trypanosoma cruzi amastigotes are flagellated protozoa that cause Chagas disease.

The correct answer is Giardia lamblia (intestinalis) cyst, which is a parasitic microscopic cyst responsible for causing the infection giardiasis in humans. Taenia solium cyst, Entamoeba histolytica cyst, and Trichinella spiralis cyst are other parasitic organisms that cause different infections in the human body.

The correct answer is Iodamoeba butschlii cyst, which is a type of parasitic amoeba known to cause gastrointestinal infections in humans. The incorrect answers are the cyst forms of other common protozoa known to cause similar infections.

Iodamoeba butschlii troph is the correct identification for the structure described. Amoeba proteus cyst, Giardia lamblia trophozoite, and E. histolytica cyst are incorrect answers as they are different organisms or stages in their life cycles.

The correct identification is Balantidium coli ova, which are ciliate protozoan organisms commonly found in the digestive tract of animals. Amoeba proteus cyst, Giardia lamblia trophozoite, and Plasmodium vivax merozoites are incorrect as they belong to different species of protozoa with distinct characteristics.

Entamoeba hartmanni cyst is a common parasite found in the human gastrointestinal tract. Giardia lamblia cyst, Cryptosporidium parvum oocyst, and Blastocystis hominis cyst are also parasites that can be found in the gastrointestinal tract, but they have distinct morphological features that differentiate them from Entamoeba hartmanni cyst.

Hymenolepis nana ova are the eggs of a parasitic tapeworm that can infect humans when ingested. This is a common finding in stool samples of individuals with Hymenolepis nana infection. The other incorrect answers are eggs of different parasitic worms that are not associated with Hymenolepis nana infection.

The identification for Babesia species is typically a maltese cross formation seen under a microscope.

The correct answer is Cyclospora species cyst, which is a parasitic organism known to cause gastrointestinal illness in humans. The other options are different microscopic organisms that can also be found in stool samples and may cause similar symptoms, but they are not specifically identified as Cyclospora species.

Dientamoeba fragilis is a protozoan parasite that can cause gastrointestinal infections in humans. When only the trophozoite form of Dientamoeba fragilis is identified in a sample, it is indicative of an active infection. Giardia lamblia, Entamoeba histolytica, and Cryptosporidium parvum are other protozoan parasites that can cause gastrointestinal infections but do not match the specific identification of Dientamoeba fragilis in trophozoite form.

Entamoeba coli troph is a common non-pathogenic amoeba found in the human intestine. Entamoeba histolytica cyst is a pathogenic amoeba responsible for causing amoebiasis. Giardia lamblia troph is a flagellated protozoan parasite that causes giardiasis. Trichomonas vaginalis troph is a sexually transmitted parasite responsible for causing trichomoniasis.

Fasciola Fasciolopsis ova are the eggs of the parasitic flatworm Fasciola and Fasciolopsis, commonly found in the feces of infected individuals. Ascaris lumbricoides eggs are the eggs of the roundworm Ascaris, Enterobius vermicularis ova are the eggs of the pinworm Enterobius, and Taenia solium eggs are the eggs of the pork tapeworm Taenia solium.

Chilomastix mesnili troph is a flagellated protozoan found in the intestine. Giardia lamblia cyst, Trichomonas vaginalis trophozoite, and Entamoeba histolytica cyst are different types of protozoa with distinct morphological features.

Chilomastix mesnili cyst is a flagellated protozoan parasite found in the human gastrointestinal tract. It can be identified microscopically in stool samples. Giardia lamblia cyst, Entamoeba histolytica cyst, and Trichomonas vaginalis cyst are different types of protozoan parasites that can also be found in the gastrointestinal tract but have distinct morphological characteristics.

Cryptosporidium parvum is a protozoan parasite that can cause gastrointestinal illness in humans. It is commonly transmitted through contaminated water sources. Giardia lamblia, Entamoeba histolytica, and Toxoplasma gondii are also protozoan parasites that can cause gastrointestinal illnesses, but they have different morphological characteristics compared to Cryptosporidium parvum.

The correct answer is Clonorchis sinensis ova, which are the eggs of the liver fluke Clonorchis sinensis. Taenia solium ova are the eggs of the pork tapeworm, Schistosoma mansoni ova are the eggs of the blood fluke Schistosoma mansoni, and Ascaris lumbricoides ova are the eggs of the roundworm Ascaris lumbricoides.

Hymenolepis diminuta ova are commonly found in grain beetles and are a type of tapeworm egg. Taenia solium egg belongs to a different type of tapeworm, Ascaris lumbricoides egg is a roundworm egg, and Hookworm ovum belong to a different group of parasites.