🦠 Microbiology Solved MCQs with Answers

Practice 1927 approved 🦠 Microbiology questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

1927 solved MCQs

Which of the following media is selective for Salmonella?Answer: Wilson and Blair's brilliant-green bismuth sulphite agar medium Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) becauseAnswer: it is less inhibitory to S. Dysentriae and S. flexneri Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae?Answer: They are oxidase-negative Dysentery may be caused byAnswer: enterotoxigenic E. coli Which of the following(s) bacteria belong to the family Entero-bacteriaceae?Answer: All of these Transmission of bubonic plague is byAnswer: all of these The bacteria, which is more resistant to adverse environmental conditions, isAnswer: S sonnei The reaction(s) that is/are usually positive in Escherichia coli, is/ areAnswer: All of these An enrichment medium for the isolation of Shigella isAnswer: Selenite F broth In Widal test the significant titres for H agglutinins isAnswer: 1:200 or more Heat-labile enterotoxin of Escherichia coli activatesAnswer: both (a) and (b) Heat-stable enterotoxin of Escherichia coli activatesAnswer: guanylate cyclase The bacteria that is negative for fermentation of mannitol isAnswer: S dysenteriae Transmission of pneumonic plague from man to man is throughAnswer: droplet infection Which of the following genus belongs to family Spirochaetaceae?Answer: All of these Which of the following bacteria is/are known as coliform bacilli?Answer: All of these The agent(s) which can cause plague is/areAnswer: Yersinia pestis Salmonellae can also be killed byAnswer: all of these Salmonellae can also be killed byAnswer: all of these Sereny test is used for the detection ofAnswer: enteroinvasive E. coli Prodigiosin (red pigment) is produced by members of genusAnswer: Serratia Which of the following serotypes of Salmonella can cause gastroenteritis?Answer: All of these Sylvatic plague occurs inAnswer: all of these Verotoxin 1 of Escherichia coli is similar toAnswer: shiga toxin Which of the following determine the pathogenicity of Yersinia pestis?Answer: All of these Enterobacter can be differentiated from Klebsiella byAnswer: both (a) and (b) In Yersinia pestis, capsule is best demonstrated in cultures grown atAnswer: 37°C Which of the following can readily kill Salmonellae?Answer: Moist heat at 55°C for 1 hr Traveller's diarrhea is caused byAnswer: entero toxigenic E. coli (ETEC) Which of the following disease is caused by Yersinia enterocolitica in man?Answer: All of these