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Mcqs MBBS Exams India
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(Single Best Answer) Question 61: An AIDS patient with T lymphocyte counts < 200 /mm3, presented with complaints of headache, nausea, dizziness and irritability. As a part of the diagnostic tests, spinal fluid was submitted to the laboratory with a request to examine the specimen directly in India ink to enhance visualization of encapsulated organisms. This request was made on the suspicion of a diagnosis of ?
A) Histoplasmosis
B) Candidiasis
C) Nocardiosis
D) Cryptococcosis
Answer (Select an option above to get the answer):
(Single Best Answer) Question 62: A patient made a self-diagnosis of athlete‚??s foot (tinea pedis) and began using a product advertised on television. The condition improved but did not clear and then the patient showed himself to a Dermatologist. A skin scraping was sent to the laboratory for culture, including culture for fungi. The fungal culture yielded a slow growing colony, which produced a few small microconidia. This is consistent with isolation of a dermatophyte of the genera ?
A) Trichophyton
B) Microsporum
C) Epidermophyton
D) Trichosporon
Answer (Select an option above to get the answer):
(Single Best Answer) Question 63: All of the following are the most common nosocomial infections, except ?
A) Staph. aureus
B) P. aeruginosa
C) Enterobacteriaceae
D) Mycobaterium
Answer (Select an option above to get the answer):
(Single Best Answer) Question 64: With reference to Bacteroides fragilis all of the following statements are true except ?
A) It is the most frequent anaerobe isolated from clinical samples
B) It is not uniformly sensitive to metronidazole
C) The lipopolysaccharide formed by B. fragilis is structurally and functionally different from the conventional endotoxin
D) Shock and disseminated intravascular coagulation are common in bacteremia due to B. fragilis
Answer (Select an option above to get the answer):
(Single Best Answer) Question 65: Streptococcal Toxic Shock Syndrome is due to the following virulence factor ?
A) M protein
B) Pyrogenic exotoxin
C) Streptolysin O
D) Carbohydrate cell wall
Answer (Select an option above to get the answer):
(Single Best Answer) Question 66: There has been an outbreak of food borne salmonella gastroenteritis in the community and the stool samples have been received in the laboratory. Which is the enrichment medium of choice ?
A) Cary Blair medium
B) V R medium
C) Selenite 'F' medium
D) Thioglycolate medium
Answer (Select an option above to get the answer):
(Single Best Answer) Question 67: A 20 year old male had pain abdomen and mild fever followed by gastroenteritis. The stool examination showed presence of pus cells and RBCs on microscopy. The etiological agent responsible is most likely to be ?
A) Enteroinvasive E.coli
B) Enterotoxigenic E.coli
C) Enteropathogenic E.coli
D) Enteroaggregative E.coli
Answer (Select an option above to get the answer):
(Single Best Answer) Question 68: The virulence factors of Neisseria gonorrhoeae include all of the following except ?
A) Outer membrane proteins
B) Ig A Protease
C) M - Proteins
D) Pili
Answer (Select an option above to get the answer):
(Single Best Answer) Question 69: A patient in an ICU is on a CVP line. His blood culture shows growth of gram positive cocci which are catalase positive and coagulase negative. The most likely etiological agent is ?
A) Staphylococcus aureus
B) Staphylococcus epidermidis
C) Streptococcus pyogenes
D) Enterococcus faecalis
Answer (Select an option above to get the answer):
(Single Best Answer) Question 70: Which of the following hepatitis viruses is a DNA virus ?
A) Hepatitis C virus
B) Hepatitis B virus
C) Delta agent
D) Hepatitis E virus
Answer (Select an option above to get the answer):