25 years old male presented with diarrhea for 6 months. On examination the causative agent was found to be acid fast with 12 micro meter diameter. The most likely agent is –
Correct Answer: Cyclospora
Description: Ans. is 'c' i.e., Cyclospora All the parasites mentioned in the question cause chronic diarrhoea {mostly in immunocompromised patients).All of them reveal oocyst on stool examination. In Giardiasis, parasite is also seen along with oocyst stool examination.Oocyst of all the organisms except giardia are acid fast. The diagnosis rests on the size of the oocyst.DIAGNOSIS OF INTESTINAL PROTOZOAL INFECTIONParasiteStoolFecal acid fast stainSize of the oocystGiardiaOocyst + Parasite 4 nuclei 8-12 x 7 x 10 pmCryptospo- ridiumOocyst+Small, 4-5 pm in diameterIsosporaOocyst+Large 25 pm in diameterCyclosporaOocyst+Medium 8-10 pm diameterMicrosporidiaSpores Special fecal stains, tissue biopsiesMore on this topicParasites causing chronic diarrhoeaGiardiaCryptosporidiosisIsosporaCyclosporaHookwormAmoebiasisStrongyloidesAcid fast organisms are -MycobacteriumLepra bacilliNocardiaIsosporaBacterial sporesRhodococcusSmegma bacilliSpermatic headCryptosporidiumCyclospora
Category:
Microbiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now