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Flashcards from PDF
Flashcards from PDF
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1
Question
What is the alternative name for Trypanosoma cruzi infection?
Answer
Chagas disease
2
Question
Which trypanosome species causes American (New World) trypanosomiasis?
Answer
T. cruzi
3
Question
What is the common term for the initial lesion at the inoculation site of T. cruzi infection?
Answer
Chagoma
4
Question
What is the major clinical hallmark of Chagas disease affecting the heart?
Answer
Myocarditis
5
Question
Which organism is described as a ciliate protozoan and a reservoir host is pigs?
Answer
Balantidium coli
6
Question
What is the characteristic motility pattern of Balantidium coli?
Answer
Directional tumbling motion
7
Question
Which protozoan is primarily associated with diarrhea and is a mask of oocysts in brush border?
Answer
Cryptosporidium parvum
8
Question
What is the typical size of Cryptosporidium parvum oocysts?
Answer
4-5 μm
9
Question
Which organism causes cystoisosporiasis (cytoisospora belli) and autofluoresces (+)?
Answer
Cytoisospora belli
10
Question
Which intestinal protozoan parasite causes intestinal sarcocystosis with tissue cysts?
Answer
Sarcocystis hominis/S. suihominis
11
Question
Which Sarcocystis species is associated with muscle tissue cysts in humans?
Answer
Sarcocystis lindemanni
12
Question
Which organism is described as a microsporidian with infective spores?
Answer
Enterocytozoon bieneusi
13
Question
What is the primary diagnostic stain technique for microsporidia as noted in the notes?
Answer
Modified Trichrome
14
Question
What is the diagnostic visualization technique that uses autofluorescence for certain coccidians?
Answer
Autofluorescence under UV light
15
Question
Which species is transmitted through ingestion of thick-walled cysts and is often asymptomatic?
Answer
Balantidium coli
16
Question
Which parasite demonstrates a thick-walled cyst and contracted sporocysts with a polar tube?
Answer
Cyclospora cayetanensis
17
Question
Which parasite is associated with autoinfection due to a thin-walled oocyst?
Answer
Cryptosporidium parvum
18
Question
What is the morphology hallmark of immature oocysts in coccidians?
Answer
Crescent-shaped immature oocyst with sporoblasts
19
Question
Which organism is noted as the only muscle habitat host for Sarcocystis species?
Answer
Humans (dead-end host for S. lindemanni)
20
Question
What staining technique is used to detect C. parvum, C. belli, and C. cayetanensis in suspected cases?
Answer
Modified Acid-Fast stain
21
Question
Which diagnostic technique is most appropriate for concentrating intestinal coccidians?
Answer
Sheather’s flotation
22
Question
Which parasite’s oocyst walls exhibit bright blue autofluorescence in diagnostic imaging?
Answer
Cytoisospora belli
23
Question
Which stage is described as infective and thin-walled for C. parvum?
Answer
Thin-walled oocyst (auto-infective in intestine)
24
Question
What is the habitat and disease association for Balantidium coli?
Answer
Large intestine; Balantidiasis (balantidial dysentery)
25
Question
Which protozoan infection frequently causes diarrhea in immunocompromised patients and is detected via modified trichrome and Calcofluor White?
Answer
Enterocytozoon bieneusi (Microsporidia)
26
Question
Which organism is described as having a wide neck and rounded bases in morphology notes?
Answer
Balantidium coli
27
Question
What does the term Chagoma denote in the context of T. cruzi infection?
Answer
Swelling at portal entry site of inoculation
28
Question
Which parasite is described as a protozoan with an extracellular trypomastigote stage?
Answer
Trypanosoma cruzi
29
Question
What is a key distinguishing factor between amoebic dysentery and balantidiasis as noted in the notes?
Answer
Balantidium coli does not invade extraintestinal sites
30
Question
What is the infective stage of C. parvum in the intestine?
Answer
Mature thin-walled oocyst