A) One bacillus B) 108-1010 bacilli C) 102-105 bacilli D) 1 - 10 bacilli Answer (Select an option above to get the answer):
(Single Best Answer) Question 102: The endotoxin of the following gram-negative bacteria does not play any part in the pathogenesis of the natural disease ?
A) Escherichia coli B) Klebsiella sp. C) Vibrio cholerae D) Pseudomonas aeruginosa Answer (Select an option above to get the answer):
(Single Best Answer) Question 103: A patient presented with cough with expectoration sputum. Culture shows gram negative organisms from only charcol extract agar, the organism is ?
A) Listeria monocytogenes B) M. catarrhalis C) B. malli/pseudomallei D) Legionella Answer (Select an option above to get the answer):
A) Nutrient broth is a basal media B) When selective agent added to solid media, it becomes enrichment media Answer (Select an option above to get the answer):
(Single Best Answer) Question 106: A young man presents with urethral discharge which has no organism but only pus cells. Diagnosis should be done on ?
A) Thayer Martin's media B) McCoy Cell Media Answer (Select an option above to get the answer):
(Single Best Answer) Question 107: A patient in ICU, on central venous line for the last one week, recieving 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 2 weeks of therapy. The most likely organism causing infection is ?
A) Staphylococcus aureus B) Viridans streptococci C) Enterococcus faecalis D) Coagulase negative staphylococcus Answer (Select an option above to get the answer):
A) B. fragilis is most frequent anaerobe isolated from clinical samples B) B. fragilis 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 Bacteroides bacteremia Answer (Select an option above to get the answer):