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Food Safety Works Colorado State University Extension
SafeFood Rapid Response Network

SAFEFOOD NEWS - Fall 1998 - Vol 3 / No. 1

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DT-104 Strain of Salmonella Typhimurium Now Harder to Kill

The Salmonella enterica serotype typhimurium, definitive type 104 (DT-104) is now resistant to five drugs (ampicillin, chloramphenicol, streptomycin, sulfonamides, and tetracycline). In 1979-1980, less than 1% of the typhimurium isolates were resistant to the above five drugs, but by 1994-1995, 34% of the typhimurium isolates were resistant.

Associations have been found in the U.S. between typhimurium DT-104 infection and the consumption of unpasteurized dairy products and direct contact with livestock. Some researchers have theorized that the use of antimicrobial agents in food animals plays a part in the growing resistance to antimicrobial drugs now appearing in bacterial strains.

Source: IFT. Food Safety Notebook, Vol. 9, No. 5, May 1998.

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