Microbiology Questions And Answers

21⟩ The laboratory reports that both blood cultures that are drawn from a 15 year old girl are growing Bacteroides fragilis. She was admitted to the hospital because of acute abdominal pain. You should be concerned that?

* A. She has acute gastroenteritis and the organism is entering the blood from the inflamed bowel endothelial surface

* B. She has a bowel perforation and intraabdominal tissue destruction with impaired vascular flow

* C. She has gram negative sepsis and the Bacteroides is a contaminant

* D. She has pelvic inflammatory disease with gonorrhea, a sexually transmitted disease, and the Bacteroides is a contaminant

Correct Answer: B

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22⟩ Anaerobic infections are?

* A. Often continuous to mucosal surfaces

* B. Associated with highly vascularized tissue

* C. Gram negative

* D. Most likely to occur in the lung with its high oxygen level

Correct Answer: A

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23⟩ Specific organisms that are considered strict anaerobes include?

* A. E. coli and Streptococcus pneumoniae

* B. Bacteroides and Klebsiella

* C. Fusobacterium and Clostridium

* D. Peptostreptococcus and Nocardia

Correct Answer: C

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24⟩ The single most important characteristic of diarrhea caused by Vibrio cholera is?

* A. Profound watery diarrhea

* B. Severe abdominal pain

* C. Massive bloody diarrhea

* D. Renal insufficiency

Correct Answer: A

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25⟩ A 15 year old boy comes in to clinic with pain in his right ear. He is on his school swim team and spends about 2 hours per day in the pool. Along with the pain in his ear, he has watery drainage coming from the ear canal. On exam his vital signs are normal, and he appears healthy, but his left external ear looks quite red and there is copious watery, slightly green drainage coming from the ear. The organism mostly likely causing this is?

* A. Staph aureus

* B. Viridans group streptococci

* C. Streptococcus pneumoniae

* D. Pseudomonas aeruginosa

Correct Answer: D

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26⟩ Helicobacter pylori?

* A. Is the presumed cause of colon cancer?

* B. Is the cause of most cases of acute food poisoning in the U.S.

* C. Is the cause of about 90% of peptic ulcers in the U.S.

* D. Is urease negative?

Correct Answer: C

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27⟩ Nonfermentative gram negative bacilli are?

* A. Strict aerobes

* B. Catalase negative

* C. Beta-hemolytic on sheep blood agar

* D. Spore forming

Correct Answer: A

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28⟩ The normal habitats of nonfermentative bacteria include the following except?

* A. Contact lens solutions

* B. Hospital water sources

* C. House plants

* D. Reptiles

Correct Answer: D

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29⟩ A 45 year old woman is admitted to the hospital with acute chest pain. On the second hospital day it is clear that she has had a myocardial infarction. Unfortunately, on the same day she develops acute diarrhea. A stool culture grows Salmonella. This infection is?

* A. Hospital acquired

* B. Nosocomial

* C. Iatrogenic

* D. Community acquired

Correct Answer: D

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30⟩ A common type of nosocomial infection is?

* A. Urinary tract infection

* B. Meningitis

* C. Cellulitis

* D. Gastroenteritis

Correct Answer: A

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31⟩ You receive a urine culture report from the laboratory on a 45 year old patient who is a quadriplegic with an indwelling urinary tract catheter. The urine culture is growing >100,000 oxidase positive gram negative bacilli. The most likely organism is?

* A. E. coli

* B. Enterococcus

* C. Klebsiella

* D. Pseudomonas aeruginosa

Correct Answer: D

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32⟩ An important means of preventing hospital acquired infections is?

* A. For health care workers to wash their hands between patient contacts

* B. For all patients to be placed in single rooms

* C. For all patients to receive a single dose of antibiotics at the time of admission

* D. An infection control program with one nurse for every 100 patients in the hospital

Correct Answer: A

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33⟩ Each of the following statements concerning Q fever is correct EXCEPT?

* A. Rash is a prominent feature

* B. It is transmitted by respiratory aerosol

* C. Sheep and cattle are in important reservoir

* D. It is caused by Coxiella burnetii

Correct Answer: A

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34⟩ Each of the following statements concerning epidemic typhus is correct EXCEPT?

* A. The disease is characterized by a rash that begins on the trunk and moves distally.

* B. The recrudescent form of the disease is called Brill-Zinsser

* C. The disease is caused by Rickettsia typhi

* D. The causative organism is transmitted to humans by lice

Correct Answer: C

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35⟩ Which of the following statements is true concerning Q fever?

* A. The organism is transmitted by fleas

* B. Headache, fever, and petechial rash are characteristic features of the disease

* C. The chronic disease is call Brill-Zinsser

* D. The disease is caused by Coxiella burnetii

Correct Answer: D

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36⟩ Which of the following is true regarding Rickettsia rickettsii?

* A. Highest attack rates occur in Colorado and Utah

* B. It can be transmitted by flying squirrels

* C. Sheep and cattle are important reservoirs

* D. It is transmitted by ticks

Correct Answer: D

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37⟩ Which of the following is not transmitted by ticks?

* A. Rocky Mountain Spotted Fever

* B. Ehrlichiosis

* C. Rickettsia rickettsii

* D. Q fever

Correct Answer: D

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38⟩ Which of the following statements concerning Bartonella henselae is correct?

* A. Causes Trench Fever

* B. Causes Bacillary Angiomatosis in AIDS patients

* C. Causes Oroya Fever

* D. Causes Veruga Peruana

Correct Answer: B

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39⟩ The lesions of bacillary angiomatosis in AIDS patients are very similar to the hemangiomatous nodules caused by?

* A. Rickettsia prowazekii

* B. Ehrlichia chaffeensis

* C. Bartonella bacilliformis

* D. Coxiella burnetii

Correct Answer: C

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40⟩ Which of the following is transmitted by lice?

* A. Rickettsia prowazekii

* B. Rickettsia typhi

* C. Rickettsia rickettsii

* D. Rickettsia tsutsugamushi

Correct Answer: A

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Microbiology

Home Medical Microbiology

124 Microbiology Questions And Answers

21⟩ The laboratory reports that both blood cultures that are drawn from a 15 year old girl are growing Bacteroides fragilis. She was admitted to the hospital because of acute abdominal pain. You should be concerned that?

22⟩ Anaerobic infections are?

23⟩ Specific organisms that are considered strict anaerobes include?

24⟩ The single most important characteristic of diarrhea caused by Vibrio cholera is?

26⟩ Helicobacter pylori?

27⟩ Nonfermentative gram negative bacilli are?

28⟩ The normal habitats of nonfermentative bacteria include the following except?

29⟩ A 45 year old woman is admitted to the hospital with acute chest pain. On the second hospital day it is clear that she has had a myocardial infarction. Unfortunately, on the same day she develops acute diarrhea. A stool culture grows Salmonella. This infection is?

30⟩ A common type of nosocomial infection is?

31⟩ You receive a urine culture report from the laboratory on a 45 year old patient who is a quadriplegic with an indwelling urinary tract catheter. The urine culture is growing >100,000 oxidase positive gram negative bacilli. The most likely organism is?

32⟩ An important means of preventing hospital acquired infections is?

33⟩ Each of the following statements concerning Q fever is correct EXCEPT?

34⟩ Each of the following statements concerning epidemic typhus is correct EXCEPT?

35⟩ Which of the following statements is true concerning Q fever?

36⟩ Which of the following is true regarding Rickettsia rickettsii?

37⟩ Which of the following is not transmitted by ticks?

38⟩ Which of the following statements concerning Bartonella henselae is correct?

39⟩ The lesions of bacillary angiomatosis in AIDS patients are very similar to the hemangiomatous nodules caused by?

40⟩ Which of the following is transmitted by lice?

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Microbiology

Home Medical Microbiology

124 Microbiology Questions And Answers

21⟩ The laboratory reports that both blood cultures that are drawn from a 15 year old girl are growing Bacteroides fragilis. She was admitted to the hospital because of acute abdominal pain. You should be concerned that?

22⟩ Anaerobic infections are?

23⟩ Specific organisms that are considered strict anaerobes include?

24⟩ The single most important characteristic of diarrhea caused by Vibrio cholera is?

26⟩ Helicobacter pylori?

27⟩ Nonfermentative gram negative bacilli are?

28⟩ The normal habitats of nonfermentative bacteria include the following except?

29⟩ A 45 year old woman is admitted to the hospital with acute chest pain. On the second hospital day it is clear that she has had a myocardial infarction. Unfortunately, on the same day she develops acute diarrhea. A stool culture grows Salmonella. This infection is?

30⟩ A common type of nosocomial infection is?

31⟩ You receive a urine culture report from the laboratory on a 45 year old patient who is a quadriplegic with an indwelling urinary tract catheter. The urine culture is growing >100,000 oxidase positive gram negative bacilli. The most likely organism is?

32⟩ An important means of preventing hospital acquired infections is?

33⟩ Each of the following statements concerning Q fever is correct EXCEPT?

34⟩ Each of the following statements concerning epidemic typhus is correct EXCEPT?

35⟩ Which of the following statements is true concerning Q fever?

36⟩ Which of the following is true regarding Rickettsia rickettsii?

37⟩ Which of the following is not transmitted by ticks?

38⟩ Which of the following statements concerning Bartonella henselae is correct?

39⟩ The lesions of bacillary angiomatosis in AIDS patients are very similar to the hemangiomatous nodules caused by?

40⟩ Which of the following is transmitted by lice?

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