Risk factors for Campylobacter spp. colonization in French free-range broiler-chicken flocks at the end of the indoor rearing period

被引:45
|
作者
Huneau-Salaun, A. [1 ]
Denis, M. [1 ]
Balaine, L. [1 ]
Salvat, G. [1 ]
机构
[1] AFSSA Ploufragan, Lab Etud & Rech Avicoles & Porcines, F-22440 Ploufragan, France
关键词
Campylobacter spp; risk factors; broiler chicken; free-range; logistic regression;
D O I
10.1016/j.prevetmed.2007.02.001
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
The aim of this cross-sectional survey was to identify risk factors for Campylobacter spp. colonization in French free-range broiler flocks at the end of the indoor rearing period (between 35 and 42 days old). Seventy-three broiler farms were studied from March 2003 to March 2004 in France. A questionnaire was administered to the farmers and samples of fresh droppings were taken to assess the flocks' Campylobacter status by bacteriology. Campylobacter species were determined by PCR. A logistic regression analysis was used to assess the influence of various factors on flocks' Campylobacter status. 71.2% of the sampled flocks excreted Campylobacter spp. before going out on the range. The risk of a flock being colonized with Campylobacter was increased in the spring/ summer period (RR = 1.8, p = 0.02) and autumn (RR = 2.2, p = 0.02) compared to winter, on total freedom rearing farms (RR = 3.3, p = 0.04) in comparison with farms with a fenced run, when the first disinfection of the poultry-house was performed by the farmer (RR = 2.4, p = 0.04) instead of a hygiene specialist, when rodent control was carried out by a contractor (RR = 1.8, p < 0.01) and not by the farmer and when the farmer came into the house twice a day as opposed to three time a day or more (RR = 1.5, p = 0.02). Use of a specific gate for chick placement decreased the risk of a flock being colonized with Campylobacter (RR = 0.5, p = 0.01) in comparison with using the gate for manual disposure or the door of the change room. (c) 2007 Elsevier B.V. All rights reserved.
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页码:34 / 48
页数:15
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