Plesiomonas shigelloides is the only species in its genus. Which of the following is that organism?

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Multiple Choice

Plesiomonas shigelloides is the only species in its genus. Which of the following is that organism?

Explanation:
A genus that contains only one species is monotypic. Plesiomonas shigelloides fits this, as the genus Plesiomonas has a single species, shigelloides. The other options belong to genera that contain multiple species (Vibrio includes many species such as vulnificus; Escherichia includes several species beyond E. coli; Shigella includes several species like dysenteriae, flexneri, boydii, and sonnei). Therefore, the organism that is the only species in its genus is Plesiomonas shigelloides.

A genus that contains only one species is monotypic. Plesiomonas shigelloides fits this, as the genus Plesiomonas has a single species, shigelloides. The other options belong to genera that contain multiple species (Vibrio includes many species such as vulnificus; Escherichia includes several species beyond E. coli; Shigella includes several species like dysenteriae, flexneri, boydii, and sonnei). Therefore, the organism that is the only species in its genus is Plesiomonas shigelloides.

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