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Avian Dis.: Horizontal transmission of Salmonella and
Campylobacter among caged and cage-free laying hens.
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| Article Type: | Report |
| Subject: |
Campylobacter infections
(Development and progression) Chickens (Diseases) Salmonellosis (Development and progression) |
| Authors: |
Hannah, J.F. Wilson, J.L. Cox, N.A. |
| Pub Date: | 03/01/2012 |
| Publication: | Name: Journal of Avian Medicine and Surgery Publisher: Association of Avian Veterinarians Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2012 Association of Avian Veterinarians ISSN: 1082-6742 |
| Issue: | Date: March, 2012 Source Volume: 26 Source Issue: 1 |
| Geographic: | Geographic Scope: United States Geographic Code: 1USA United States |
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| Accession Number: | 288978081 |
| Full Text: |
In each of 5 sequential trials, laying hens (5672 weeks of age)
were challenged with Salmonella and Campylobacter, and, 1 week
postinoculation, the challenged hens (n = 3) were commingled with
nonchallenged hens (n = 12) in conventional wire cages, on all-wire
slats, or on all-shavings floor housing systems. After 12 days,
challenged and nonchallenged hens were euthanatized for sample
collection. Ceca were aseptically collected from all hens, and the
spleen, liver/gallbladder (LGB), lower (LRT) and upper (URT)
reproductive tracts, and ovarian follicles (mature and immature) were
collected from only the challenged hens after commingling. Samples were
divided equally and cultured separately for Salmonella and
Campylobacter. Differences in the horizontal transmission of the
challenge Salmonella to nonchallenged hens housed in cages (12%), on
slats (15%), and on shavings (14%) were not significantly different (P
> .05) from the challenged pen-mate hens over the 5 trials. However,
with the inclusion of residual environmental Salmonella, the recovery of
Salmonella from nonchallenged hens housed in cages was lowest, at 15%;
intermediate for hens on slats, at 20%; and highest for hens on
shavings, at 38%. Among challenged hens housed in cages, Salmonella was
recovered from only 27% of the cecum and LRT samples. From challenged
hens housed on slats, Salmonella was recovered from 38% of the cecum,
12% of the spleen, 19% of the LGB, 44% of the LRT, and 19%, of the URT
samples. From challenged hens housed on shavings, Salmonella was
recovered from 31% of the cecum; 15% of the spleen, LGB, and URT; and
31% of the LRT samples. Horizontal transmission of Campylobacter among
nonchallenged pen-mate hens was significantly lower for hens housed in
cages, at 28%, than for hens on shavings, at 47%, with hens on slats
being intermediate, at 36%. For challenged hens housed in cages,
Campylobacter was recovered from 27% of the cecum, 13% of the LRT, 7% of
the URT, and 17% of the follicle samples. Among the challenged hens
housed on slats, Campylobacter was recovered from 44% of the cecum, 6%
of the spleen, 19% of the LGB, 12% of the LRT, 6% of the URT, and 14% of
the follicle samples. Among challenged hens housed on shavings,
Campylobacter was recovered from 46% of the cecum, 8% of the LRT and
URT, and 40% of the follicle samples. The overall results of this study
indicate that the caged housing system provided the lowest horizontal
transmission level of Salmonella and Campylobacter among egg-laying
hens. 2011;55:580-587. |
| Gale Copyright: | Copyright 2012 Gale, Cengage Learning. All rights reserved. |