Editorial Type:
Microbiology

Colonization control of lactose-fermenting Salmonella typhimurium in young broiler chickens by use of dietary lactose

Richard L. Ziprin From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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Marcel H. Elissalde From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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Arthur Hinton Jr. From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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Ross C. Beier From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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George E. Spates From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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Donald E. Corrier From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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Thomas G. Benoit From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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John R. DeLoach From the US Department of Agriculture, Agricultural Research Service, Food Animal Protection Research Laboratory, Rt 5, Box 810, College Station, TX 77845.

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SUMMARY

Inclusion of lactose in the diets of chickens has been determined to reduce cecal colonization with Salmonella typhimurium. We hypothesized, therefore, that dietary lactose may be a practical means for reducing the prevalence of Salmonella contamination of chicken products. Because some strains of Salmonella are atypical and ferment lactose, we investigated the effects of dietary lactose on cecal colonization with lactose-fermenting S typhimurium. Broiler chicks were inoculated intracloacally with Lac+ S typhimurium selected for resistance to novobiocin and rifampicin. The chicks also were inoculated orally with certain anaerobes that do not effectively inhibit colonization by S typhimurium, but do appear essential for lactose mediated inhibition of cecal colonization. Control chicks were not given dietary lactose, and chicks in the experimental group were fed a diet containing 7% lactose. Enumeration of Lac+ S typhimurium in cecal contents revealed dietary lactose to be effective at controlling this organism. Control was correlated with changes in cecal pH and increases in undissociated volatile fatty acids, especially propionic acid.

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Cover American Journal of Veterinary Research
American Journal of Veterinary Research
Issue:
01 Jun 1991
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