Abstract
Genes resistant to tetracycline have been found in groundwater as far as 250 m downstream from two swine facilities that use antibiotics as growth promoters. The finding is significant because it shows the potential for spreading resistance back into the food chain of animals and people, say researchers from the University of Illinois and Illinois State Geological Survey. Using standard PCR, they analyzed samples from lagoons, wells and groundwater on and near two Illinois facilities. The researchers could identify the trail taken by the resistance genes as the DNA in the samples matched the resistance genes previously identified in livestock and feed. [Chee-Sanford, J.C. et al. (2001) Appl. Env. Microbiol. 67, 1494–1592] PL
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