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RESPONSES OF BACTERIA TO THE PRESENCE OF CARBARYL IN WATER. II. PURE CULTURE VS. MIXED CULTURE RESPONSE1
Authors:Rufus K Guthrie  Ure A Anugwelem  Ernst M Davis
Abstract:ABSTRACT: Escherichia coli. Streptococcus faecalis, Salmonella typhimurium, and Staphylococcus aureus were tested in pure culture and in various combined mixed cultures to determine effects of the presence of carbaryl in water. Oxygen uptake of E. coli and S. typhimirium was stimulated by five mg/L carbaryl when mixed together, but no stimulation was observed when either organism was tested alone or with other bacteria. In mixed culture the survival time of S. faecalis was reduced in the presence of five mg/L carbaryl; however, the survival time of both S. aureus and S. typhimurium was increased in the presence of five mg/L carbaryl. Implications of these results are discussed.
Keywords:indicator bacteria  pathogenic bacteria  carbaryl  sevin  pure cultures  mixed cultures
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