Multiple Choice
Which of the following statements regarding the Salmonella bacterium is correct?
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1. Introduction to Microbiology
Members of the Bacterial World
Multiple Choice
Which of the following microorganisms commonly colonize portions of the human respiratory tract?
A
Escherichia coli
B
Streptococcus pneumoniae
C
Lactobacillus acidophilus
D
Clostridium tetani
Verified step by step guidance1
Step 1: Understand the question is asking which microorganisms commonly colonize the human respiratory tract. This means identifying normal flora or common pathogens found in that area.
Step 2: Recall that Escherichia coli is primarily found in the gastrointestinal tract, not the respiratory tract, so it is unlikely to be a common colonizer there.
Step 3: Recognize that Streptococcus pneumoniae is a well-known bacterium that commonly colonizes the upper respiratory tract and can sometimes cause respiratory infections.
Step 4: Note that Lactobacillus acidophilus is typically found in the gastrointestinal and vaginal tracts, not the respiratory tract.
Step 5: Understand that Clostridium tetani is an environmental bacterium associated with soil and wounds, not a normal colonizer of the respiratory tract.
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