Chapter 14 Mastering Questions

14) Which of the following statements about nosocomial infections is not true? A) They occur in compromised patients. B) They are caused by opportunists. C) They are caused by drug-resistant bacteria. D) They are caused by normal microbiota. E) None of the above.

28) A cold transmitted by a facial tissue is an example of A) Direct contact B) Droplet transmission C) Fomite D) Vector E) Vehicle transmission

10) Which type of infection can be caused by septicemia? A) Bacteremia B) Focal infection C) Local infection D) Septicemia E) Systemic infection

40) The yeast Candida albicans does not normally cause disease because of A) Symbiotic bacteria. B) Antagonistic bacteria. C) Parasitic bacteria. D) Commensal bacteria. E) None of the above.

39) Which one of the following is not an example of microbial antagonism? A) Acid production by bacteria B) Bacteriocin production C) Bacteria occupying host receptors D) Bacteria causing disease E) None of the above

7) Mechanical transmission differs from biological transmission in that mechanical transmission A) Doesnʹt require an arthropod. B) Involves fomites. C) Doesnʹt involve specific diseases. D) Requires direct contact. E) Doesnʹt work with noncommunicable diseases.

35) The most likely mode of transmission of pneumonic plague between humans is A) Direct contact. B) Droplet transmission. C) Fomite. D) Vector. E) Vehicle transmission.

16) Which of the following is not a reservoir of infection? A) A sick person B) A healthy person C) A sick animal D) A hospital E) None of the above

2) Which of the following statements is true? A) Symbiosis refers to different organisms living together. B) Members of a symbiotic relationship cannot live without each other. C) A parasite is not in symbiosis with its host. D) Symbiosis refers to different organisms living together and benefiting from each other. E) At least one member must benefit in a symbiotic relationship.

32) A needlestick is an example of A) Direct contact. B) Droplet transmission. C) Fomite. D) Vector. E) Vehicle transmission.

9) Which of these infections can cause septicemia? A) Bacteremia B) Focal infection C) Local infection D) Septicemia E) Systemic infection

11) Koch observed Bacillus anthracis multiplying in the blood of cattle. What is this condition called? A) Bacteremia B) Focal infection C) Local infection D) Septicemia E) Systemic infection

5) Kochʹs postulates donʹt apply to all diseases because A) Some microorganisms canʹt be cultured in laboratory media. B) Some microorganisms donʹt cause the same disease in laboratory animals. C) Some microorganisms cause different symptoms under different conditions. D) Some microorganisms canʹt be observed. E) All diseases arenʹt caused by microorganisms.

31) Gastroenteritis acquired from roast beef is an example of A) Direct contact. B) Droplet transmission. C) Fomite. D) Vector. E) Vehicle transmission.

12) Nosocomial infections are most often caused by A) Escherichia coli. B) Staphylococcus aureus. C) Enterococcus. D) Pseudomonas. E) Klebsiella.

19) All of the following statements about biological transmission are true except A) The pathogen reproduces in the vector. B) The pathogen may enter the host in the vectorʹs feces. C) Houseflies are an important vector. D) The pathogen may be injected by the bite of the vector. E) The pathogen may require the vector as a host.