16. Transmission of the pneumonic plague from man to man is through
A. inoculation
B. ingestion
C. droplet infection
D. all of these
17. Which of the following genus belongs to family Spirochaetaceae?
A. Treponema
B. Spirochaeta
C. Borrelia
D. All of these
18. Which of the following bacteria is/are known as coliform bacilli?
A. Escherichia
B. Klebsiella
C. Enterobacter
D. All of these
19. The agent(s) which can cause plague is/are
A. Yersinia pestis
B. Proteus mirabilis
C. Pseudomonas aeruginosa
D. All of these
20. Salmonellae can also be killed by
A. pasteurization
B. chlorination
C. boiling
D. all of these