Abstract
Vibrio cholerae serotype O1 organisms that do not produce cholera toxin and, in fact, lack the genetic material encoding the enterotoxin have recently been detected in coastal regions of the United States. Although these organisms have been assumed to be nonpathogenic, they have been considered a potential reservoir of toxigenic V. cholerae. In 1979, nontoxigenic V. cholerae O1 was isolated from a leg wound of an accident victim residing in New Orleans. The only known risk factors of the patient, besides his debilitated condition, were alcoholism and the consumption of raw oysters before recognition of his wound infection. Coincident with the identification of the isolate from the leg wound, an identical nontoxigenic V. cholerae O1 isolate was cultured from the sewage system serving the residence of this patient. Nontoxigenic V. cholerae O1 seems to be capable of multiplying in human tissue and may produce extraintestinal infection. This indigenous inhabitant of temperate coastal regions may not be avirulent and may be of public health significance.
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