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Gram Stain
(Single Best Answer) Question 1: In HIV infected individual Gram stain of lung aspirate shows yeast like morphology. All of the following are the most likely diagnosis except ?
A) Candida tropicalis
B) Cryptococcus neoformans
C) Pencillium marneffi
D) Aspergillus fumigates
Answer (Select an option above to get the answer):
(Single Best Answer) Question 2: A 45 year old female complains of lower abdominal pain and vaginal discharge. On examination there is cervicitis along with a mucopurulent cervical discharge. The gram smear of the discharge shows presence of abundant pus cells but no bacteria. The best approach to isolate the possible causative agent would be ?
A) Culture on chocolate agar supplemented with Haemin
B) Culture on McCoy cells
C) Culture on a bilayer of human blood agar
D) Culture on vero cell lines
Answer (Select an option above to get the answer):
(Single Best Answer) Question 3: An elderly diabetic has left sided orbital cellulites. CT Scan of paranasal sinuses shows evidence of left maxillary sinusitis. Gram stained smear of the orbital exudate shows irregularly branching septate hyphae. The following is the most likely etiological agent ?
A) Aspergillus
B) Rhizopus
C) Mucor
D) Candida
Answer (Select an option above to get the answer):
(Single Best Answer) Question 4: The capsule of Cryptococcus neoformans in a CSF sample is best seen by ?
A) Grams stain
B) India ink preparation
C) Giemsa stain
D) Methanamine - Silver stain
Answer (Select an option above to get the answer):
(Single Best Answer) Question 5: A 23 year old male had unprotected sexual intercourse with a commercial sex worker. Two weeks later, he developed a painless, indurated ulcer on the glans which exuded clear serum on pressure. Inguinal lymph nodes in both groins were enlarged and not tender. The most appropriate diagnostic test is ?
A) Gram's stain of ulcer discharge
B) Darkfield microscopy of ulcer discharge
C) Giemsa stain of lymph node aspirate
D) ELISA for HIV infection
Answer (Select an option above to get the answer):
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