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ATI RN · Microbiology · microbiology an evolving science test bank

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

A child with fever and a sore throat had a Gram-stained smear revealing Gram-positive cocci in chains. The bacteria were beta-hemolytic. What is the likely causative agent?

A. Streptococcus pyogenes
B. Streptococcus pneumoniae
C. Staphylococcus aureus
D. Enterococcus faecalis

Expert Explanatory Rationale

Correct Answer: Streptococcus pyogenes

Question 2 of 5

Bacteria that have been identified as frequently responsible for nonsexually transmitted infections of the reproductive system include:

A. Escherichia coli, Gardnerella vaginalis, and Staphylococcus aureus
B. Streptococcus faecalis, Klebsiella oxytoca, and Serratia marcescens
C. Clostridium tetani, Bacillus cereus, and Staphylococcus aureus
D. Neisseria gonorrhoeae, Helicobacter pylori, and Pseudomonas aeruginosa

Expert Explanatory Rationale

Correct Answer: Escherichia coli, Gardnerella vaginalis, and Staphylococcus aureus

Question 3 of 5

A 47-year-old male patient consulted a dentist about difficult mouth opening (lockjaw or trismus). The patient has a history of a stab wound of the lower extremity. What infection can be manifested by these symptoms?

A. Tetanus
B. Brucellosis
C. Whooping cough
D. Anaerobic wound infection

Expert Explanatory Rationale

Correct Answer: Tetanus

Question 4 of 5

The cleanup of various industrial wastes by living organisms is referred to as __________.

A. biomining
B. biosynthesis
C. bioremediation
D. bioengineering

Expert Explanatory Rationale

Correct Answer: bioremediation

Question 5 of 5

A patient being treated in the burns department has suppurative complication. The pus is of bluish- green color that is indicative of infection caused by Pseudomonas aeruginosa. What factor is typical for this causative agent?

A. Gram-negative stain
B. Presense of spores
C. Coccal form
D. Cell pairing

Expert Explanatory Rationale

Correct Answer: Gram-negative stain

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