American Society of Microbiology ABMM ABMM Question # 77 Topic 3 Discussion
ABMM Exam Topic 3 Question 77 Discussion:
Question #: 77
Topic #: 3
A microbiology laboratory is investigating a possible outbreak of Salmonella infection. Serological testing of patient isolates reveals they all possess the same O antigen but different H antigens. This suggests:
A.
A single point source of infection with a genetically stable strain.
B.
Multiple sources of infection with unrelated Salmonella strains.
C.
A common ancestral strain that has undergone flagellar antigen variation.
D.
Contamination in the laboratory affecting multiple samples.
Chosen Answer:
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