Parasitology- Exam Questions With 100% Correct Answers 2024

Parasitology- Exam Questions With 100% Correct Answers 2024 What is the most common way to acquire an amoebic infection - answerCysts from contaminated food or water Acantamoeba keratitis is usually associated with - answerpoor contact lens care True or false: Enamoeba histolytica can be distinguished from E. dispar by microscopic morphology - answerFalse Which are true about Blastocystis hominis? a. Cysts are 4-6 um b. cyst includes a large central vacuole pushing nuclei to the periphery of the cell c. it is associated with ingested contaminated food or water d. no consensus on pathogenicity - answerb, c, d all true What is the likely identification of this amoeba? The size of the cyst is 25 um, Hint: count the nuclei - answerEntamoeba coli How would you describe the karyosome of this nucleus of Entamoeba histolytica? - answercentral What are reasons to reject a stool sample for ova and parasite analysis? - answer1. collected after administration of antibiotics 2. barium use 3. use of laxatives What is the formalin vial used for when performing an O+P analysis - answerstool concentration Which parasite is nicknamed the "brain eating amoeba"? - answerNaegleria fowleri Cytoplasmic granules released from disintegrated eosinophils are called: - answerCharcot- Leiden crystals Which parasitic infection is marked severe malabsorption syndrome and flattening of villi of the small intestine - answerGiardia lamblia Which parasite is known for 2 fragmented nuclei in the troph form? - answerDientamoeba fragilis A cyst in a stained fecal preparation was described as "an old woman with glasses" the most likely ID is - answerGiardia lamblia What is the vector for a Leishmania infection? - answersandfly True or False: Leishmania amastigotes can be found both intracellularly and extracellularly - answerFalse True or False: another word for visceral leishmaniasis is Kala-azar - answerTrue Cutaneous leishmaniasis is caused by - answerL. tropica (Leishmania tropica) What is the diagnostic stage for Trypanosoma brucei? - answertrypomastigotes in the blood What is the definitive host in the Plasmodium life cycle? - answerMosquito True or False: possession of the duffy antigen on red blood cells protects a person from infection with P. vivax - answerFalse, the lack of the Duffy antigen protects from P. vivax infection Which plasmodium species have a dormant stage in their life cycle called the hynozoite? - answerP. vivax and P. ovale Which species of plasmodium is associated with "black water fever" - answerP. falciparum Which plasmodium species is known for the characteristics shown in the photo? - answerP. falciparum What is the image below? - answerTetrad merozoites of Babesia microti How can Toxoplasma gondii be transmitted? a. ingestion of oocysts from domestic cat feces b. blood transfusion c. transplacental d. all of the above - answerd. all of the above this oocyst is 4-6 um, modified acid fast pos, causes intracellular parasitophorous vacuoles in host intestines - answercryptosporidium spec