31. Which of the following disease is caused by Yersinia enterocolitica in a man?

A. Gastroenteritis
B. Mesenteric lymphadenitis
C. Septicaemia
D. All of these

32. The most common cause of urinary tract infection in the community is

A. Klebsiella pneumoniae
B. Proteus vulgaris
C. Escherichia coli
D. Citrobacter freundii

33. Bipolar staining is characteristic of

A. Yersinia pestis
B. Proteus mirabilis
C. Pseudomonas aeruginosa
D. all of these

34. Spirochaetes exhibit

A. corkscrew-like rotatory movement
B. flexion and extension motility
C. translatory motion
D. all of the above

35. Species of Shigella which is predominant in India is

A. S sonnei
B. S dysenteriae
C. S boydii
D. S flexneri