Analysis of Escherichia coli O157:H7 survival in ovine or bovine manure and manure slurry

Article Abstract:

Research was conducted to examine the survival of Escherichia coli O157:H7 in the manures of cattle and sheep exposed to fluctuating environmental conditions and in experimentally inoculated manure. E. coli O157:H7 was found to survive for over one year in a nonaerated ovine manure pile exposed to environmental conditions. It survived for four months and 47 days for aerated ovine manure and bovine manure, respectively.

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Effect of cattle diet on Escherichia coli O157:H7 acid resistance

Article Abstract:

The duration of shedding of Escherichia coli O157 isolates by hay-fed and grain-fed steers experimentally inoculated with E. coli O157:H7 was contrasted, including the acid resistance of the bacteria. The hay fed animals discarded E. coli O157 longer than the grain-fed animals, and irrespective of diet, these bacteria were equally acid resistant. Feeding cattle hay may increase human infections with E. coli O157:H7.

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Evaluation of dietary influences on Escherichia coli O157:H7 shedding by sheep

Article Abstract:

A study was conducted on the influence of diet, fasting and other dietary changes in Escherichia coli O157:H7 shedding by sheep. Results show that sheep subjected to grass hay diet shed Escherichia coli twice as long than those fed with a mixture of corn and pelleted alfalfa. Results also demonstrate that preharvest diet control may be used to keep animals infected with the bacterium from entering the food chain.

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