Flagellin A gene restriction fragment length polymorphism patterns of Campylobacter spp. isolates from broiler production sources.

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Abstract
The purpose of this study was to determine the potential reservoirs for Campylobacter spp. that provide the initial sources involved with broiler chicken colonization during poultry production. We characterized the flagellin A gene (flaA) of the organism by restriction fragment length polymorphism (RFLP) for 59 isolates of the bacterium provided during an epidemiological study. Isolates were obtained from three broiler production houses existing at separate locations. They were cultured and isolated from other (nonbroiler) domestic farm animals, wild birds, rodents, feed, farmers' boots, chicken feathers, and chicken intestinal materials. Eight distinctive flaA types were found in two of the houses. In one house, at least five flaA types (4, 6, 8, 15, and 21) were characterized from the poultry production environment, with three types isolated and identified from the chicken intestinal tract. flaA type 15 was found in flies, on boots, and in chicken intestinal samples. In another house, a distinctive diversity of flaA types existed (4, 7, 43, and 53). At least three flaA types found in samples from chicken intestinal tracts were also found in warm-blooded animals outside of the poultry house (domesticated animals, wild birds, and vermin).

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