Microbiology MCQ

Created by clinicalsci

Microbiology MCQ

Welcome to the Clinical Microbiology Multiple Choice Questions test. You have 30 minutes to answer 30 questions.

Lets begin, Good Luck!!


1 / 30

In the CAMP test, a single streak of a beta-hemolytic Streptococcus is placed perpendicular to a streak of beta-lysin-producing Staphylococcus aureus. After incubation, a zone of increased lysis in the shape of an arrowhead is noted; this indicates the presumptive identification of:

2 / 30

In suspected cases of brucellosis, the optimal specimen to be collected for the isolation of the etiologic agent is:

3 / 30

The K antigen of the family Enterobacteriaceae is:

4 / 30

Which of the following is causative of melioidosis ?

5 / 30

Which of the following is catalase negative?

6 / 30

Enterotoxin produced by Staphylococcus aureus is responsible for causing

7 / 30

The causative agent of "malignant pustule" is:

8 / 30

The beta-hemolysis produced by group A Streptococcus seen on the surface of a sheep blood agar plate is primarily the result of wchich streptolysin?

9 / 30

Some strains of Serratia marcescens produce a red-colored pigment. Pigment production is enhanced by:

10 / 30

Which of the following lack motility ?

11 / 30

Rust-colored sputum in cases of lobar pneumonia is characteristic of which of the following possible etiologic agents?

12 / 30

The majority of clinical isolates of Klebsiella are

13 / 30

One of the most common etiologic agents of community-acquired uncomplicated cases of cystitis is:

14 / 30

Edwardsiella tarda is occasionally isolated in stool specimens and can biochemically be confused with ?

15 / 30

The pulmonary form of anthrax is known as:

16 / 30

Swimmer's ear, a form of external otitis is commonly caused by :

17 / 30

Campylobacter spp. are associated most frequently with cases of:

18 / 30

The most common etiologic agent of infections associated with the surgical insertion of prosthetic devices such as artificial heart valves and cerebrospinal fluid shunts is:

19 / 30

Which of the following organism is oxidase-positive and glucose nonfermenting ?

20 / 30

Staphylococcus aureus, when present, could most likely be recovered from a stool sample if the primary plating medium included:

21 / 30

Haemophilus ducreyi is the causative agent of:

22 / 30

Streptococcus sanguis, a viridans streptococcus, is most commonly associated with which of the following clinical conditions?

23 / 30

Precipitates of diphtheria toxin and antitoxin formed in agar gels are an in vitro means for detecting toxigenic strains of Corynebacterium diphtheriae. The name of this test procedure is the:

24 / 30

Which is the causative agent of the form of conjunctivitis known as pinkeye ?

25 / 30

Severe disseminated intravascular coagulation often complicates cases of septicemia is caused by:

26 / 30

Acinetobacter baumannii is characteristically:

27 / 30

Which enzyme cannot be synthesized by streptococci?

28 / 30

Fecal cultures are inoculated on thiosulfate-citrate-bile salts-sucrose agar specifically for the isolation of:

29 / 30

The species of Mycobacterium that would be most commonly associated with contamination of the hot water system in large institutions such as hospitals is:

30 / 30

A test for the hydrolysis of esculin in the presence of bile is especially useful in identifying species of the genus:

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