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Applied and Environmental Microbiology, February 2001, p. 848-851, Vol. 67, No. 2
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.2.848-851.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Competitive Exclusion of Heterologous Campylobacter spp. in Chicks

Hui-Cheng Chendagger and Norman J. Stern*

Poultry Microbiological Safety Research Unit, USDA Agricultural Research Service, Russell Research Center, Athens, Georgia 30605

Received 20 June 2000/Accepted 23 November 2000

Chicken and human isolates of Campylobacter jejuni were used to provide oral challenge of day-old broiler chicks. The isolation ratio of the competing challenge strains was monitored and varied, depending upon the isolates used. A PCR-restriction fragment length polymorphism assay of the flagellin gene (flaA) was used to discriminate between the chick-colonizing isolates. Our observations indicated that the selected C. jejuni colonizers dominated the niche provided by the chicken ceca. Chicken isolates from the flaA type 7 grouping generally had numerical superiority over the human isolates when they were administered in our 1-day-old chick model. Our results suggest that it is possible to use combinations of C. jejuni chicken isolates as a defined bacterial preparation for the competitive exclusion of human-pathogenic C. jejuni in poultry.

* Corresponding author. Mailing address: Poultry Microbiological Safety Research Unit, USDA Agricultural Research Service, Russell Research Center, 950 College Station Rd., Athens, GA 30605. Phone: (706) 546-3516. Fax: (706) 546-3771. E-mail: nstern{at}saa.ars.usda.gov.

dagger Present address: Food Industry Research and Development Institute, Hsinchu 300, Taiwan.

Applied and Environmental Microbiology, February 2001, p. 848-851, Vol. 67, No. 2
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.2.848-851.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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