Occurrence and genotypes of Campylobacter species in broilers during the rearing period.

Occurrence and genotypes of Campylobacter species in broilers during the rearing period.
Avian Pathol. 2016 Oct 21;:1-26
Authors: Zhang X, Yin T, Du X, Yang W, Huang J, Jiao X
Abstract
Poultry is the main source of Campylobacter infection worldwide. To obtain information on Campylobacter-infected flocks and create a reference for preventing and controlling Campylobacter at the farm level, Campylobacter isolates were recovered from broilers, and the environments of 9 chicken flocks in 2 farms during their growth process were observed. The genetic relationship between the Campylobacter isolates was determined using multilocus sequence typing (MLST). The flocks were colonized as early as 3 weeks after introduction to the farm. The highest colonization rate was more than 90%, which occurred 4-6 weeks after introduction to the farm. Quantitative data showed that the highest Campylobacter loads appeared at 1-2 weeks after initial colonization. Campylobacter loads in cloacal swabs in 4 flocks were significantly higher at 5 weeks than at 3 weeks (P<0.05). MLST of 171 selected Campylobacter isolates revealed 20 sequence types (STs), which consisted of 12 STs for Campylobacter jejuni and 8 for Campylobacter coli isolates. The STs of the Campylobacter isolates recovered from farm 1 were more diversified than those from farm 2. The STs of the environmental samples were highly consistent with those of the cloacal swab samples. The consistency ...

Source: Avian Pathology - October 20, 2016 Category: Pathology Authors: Zhang X, Yin T, Du X, Yang W, Huang J, Jiao X Tags: Avian Pathol Source Type: research