Abstract:
Poultry origin zoonotic Campylobacter spp. is considered as one of the leading causal
agents of human foodborne illness. A cross-sectional study (October 2020 to January
2021) was conducted to estimate the prevalence of Campylobacter spp. colonization
and its associated risk factors in the broiler farms of Munshigonj, Narayanganj and
Narsingdi Districts in Bangladesh. Cloacal swab samples were collected and pooled
from the broiler farms Standard bacteriological and molecular techniques were
followed to isolate and identify Campylobacter spp. Data on management,
biosecurity, mortality and hygiene practices were collected using a structured
questionnaire. The majors risk factors were analyzed at the farm level. Among 100
pooled (five samples from each broiler farm) cloacal swab samples from 100 broiler
farms, the prevalence of Campylobacter spp. was estimated to be 24% (95% CI
16.02–33.57). The tended to be higher prevalence Campylobacter spp. colonization
was found in Narsindi district (32.35%) followed by Narayanganj (27.78%) and
Munshiganj (10%) (p=0.09). In risk factor analysis, the factors more significantly
associated with Campylobacter colonization were human traffic (more than one
person enter into the shed, p=0.006), source of water (tube well, p=<0.001), not using
of dedicated cloth or footwear into the farms (p=0.032), no use of disinfection of
farms before restock (p=0.014) and less gap (minimum 14 days) between two batches
during broiler rearing (p=0.008) associated with tended risk factors included absence
of footbath facilities, presence of rodents in the farms, litter store outside of farms
(0.05<p<0.1). The study gathered evidence of the presence of Campylobacter spp.
colonization in the broiler farms and identified the factors that could help set effective
interventions in the controlling of Campylobacter infection in chickens to reduce
Campylobacter infection in humans through broilers.
Keywords: Campylobacter spp., cloacal swab, prevalence, risk factors, Biosecurity.
Description:
A Thesis
Submitted to the Department of Medicine & Public Health
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
MEDICINE
SEMESTER: DECEMBER, 2021
