Tuesday, November 15, 2011

434 - AIIMS NOVEMBER 2011 Mcqs with answers - part 6

26.A young male patient presented with urethral discharge. On urine examination pus cells were found but no organisms. Which method would be the best for culture
a.McCoy cell line
b.Thayer martin medium
d.Levinthal medium

27.With reference to Bacteroides fragilis, the following statements are true except
a.B.fragilis is the same frequent anaerobe isolated from clinical samples
b.B.fragilis is not uniformly sensitive to metronidazole
c.The lipopolysaccaride formed by B.fragilis is structurally and functionally different from the conventional endotoxin
d.Shock and disseminated intravascular coagulation are common in Bacteroides bacteremia

28.A child had pustular lesion on leg. On gram staining gram positive cocci are seen. To establish the diagnosis of Group A Streptococcal erythroderma, the test used is
a.Bile solubility test
b.Catalase test
c.Optochin sensitivity
d.Bacitracin sensitivity

29.A patient admitted to an ICU is on central venous line for the last one week. He is on ceftazidime and amikacin. After 7 days of antibiotics he develops a spike of fever and his blood culture is positive for gram positive cocci in chains, which are catalase negative. Following this, vancomycin was started but the culture remained positive for the same organism even after 2weeks of therapy. The most likely organism causing infection is
a.Staphylococcus aureus
b.Viridans streptococci
c.Enterococcus faecalis
d.Coagulase negative staphylococcus

30.In acute inflammation due to the contraction of endothelial cell cytoskeleton, which of the following results
a.Delayed transient increase in permiability
b.Early transient increase
c.Delayed permanent increase
d.Early permanent increase

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