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MCQ on antibacterials: Page-5

Which of the following is more active?
co-trimoxazole

(A) P

(B) Q

(C) Both P and Q are equally effective

(D) P is more active on gm +ve infections while Q is more active against gm -ve infections

Sulfonamides are more effective than trimethoprim and trimethoprim is alone ineffective and  always combined with sulfonamides.

The most common pathological microorganism for urinary tract infections is

(A) E.coli

(C) H.pylori

(C) Pseudomonas aeruginosa

(C) Bacillus subtilis

Which of the following drug produces diarrhea as one of the important side effect

(A) Linezolid is non-selective inhibitor of MAO

(C) Clindamycin

(C) Vancomycin

(D) Quinupristin

Clindamycin produces pseudomembranous colitis causing diarrhea and it is produced by clostridium difficile which is not susceptible to clindamycin. This condition can be treated by vancomycin or metronidazole.