The O antigens used to serogroup Shigella are also used to serogroup which other organism?

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Prepare for the Clinical Laboratory Science Bacteriology Test. Engage with multiple choice questions and flashcards with helpful hints and explanations. Ace your exam confidently!

Multiple Choice

The O antigens used to serogroup Shigella are also used to serogroup which other organism?

Explanation:
O antigens are the polysaccharide components of the LPS on the surface of many Gram-negative bacteria, and serogrouping is based on those surface sugar patterns. Shigella uses its O antigens to define serogroups, and those same O antigen structures are found in Escherichia coli. Because Shigella and E. coli share closely related LPS O-antigen configurations, the antisera that identify Shigella O groups also recognize the corresponding E. coli O groups. That’s why the O antigens used to serogroup Shigella are also used to serogroup Escherichia coli. Other organisms listed are not classified by this shared O-antigen system in routine clinical serotyping.

O antigens are the polysaccharide components of the LPS on the surface of many Gram-negative bacteria, and serogrouping is based on those surface sugar patterns. Shigella uses its O antigens to define serogroups, and those same O antigen structures are found in Escherichia coli. Because Shigella and E. coli share closely related LPS O-antigen configurations, the antisera that identify Shigella O groups also recognize the corresponding E. coli O groups. That’s why the O antigens used to serogroup Shigella are also used to serogroup Escherichia coli. Other organisms listed are not classified by this shared O-antigen system in routine clinical serotyping.

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