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Distinctive biochemical features of Salmonella dublin isolated in California.

ABSTRACT

We examined 34 strains of Salmonella dublin that were isolated in California between 1978 and 1982. All were of a characteristic biotype; they did not grow on Simmons citrate or acetate and did not ferment arabinose. Their apparent inability to use citrate as the only carbon source was due to a nutritional requirement for nicotinic acid. Because S. dublin strains are of a characteristic biotype, are host adapted to bovines, and are unusually virulent for humans, we suggest that S. dublin be considered a separate species of the genus Salmonella. It is important that clinical laboratories recognize and differentiate this organism from less pathogenic salmonellae so that they can alert clinicians to the presence of this invasive microorganism.

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