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| Internal and External Carriage of Inoculated Salmonella in Broiler Chickens |
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J.A. Cason,
R.J. Buhr,
L.J. Richardson and N.A. Cox |
Abstract:
External and internal persistence of inoculated
Salmonella and spread to uninoculated broiler chicks in the same
pens were studied by sampling ceca and rinses of feathered carcasses in
two experiments. Half of the day-old chicks in pens were orally inoculated
with a nalidixic-acid-resistant strain of Salmonella Typhimurium at
three levels of inoculum (0.1 mL delivering approximately 4 X
102, 104, or 106 cfu). At 3, 6, and 8
weeks of age, equal numbers of inoculated and non-inoculated pen mates
were individually electrocuted and rinsed in 400 mL of diluent, after
which ceca were removed aseptically, with a total of 654 chickens sampled
in the two experiments. There were no differences in Salmonella
incidence between inoculated and non-inoculated birds at any age, so the
marker Salmonella was well distributed within pens. Total incidence
was 70%, 86%, and 83% at the 102, 104, and
106 inoculum levels, respectively. Considering both cecal and
rinse samples, incidence was 81%, 84%, and 72% at 3, 6, and 8 weeks of age
respectively. There were 95 positives in the cecal samples only, 149
positives in the rinses only, and 277 positives in both ceca and rinse
samples, so sampling either ceca or carcass rinses alone underestimated
the total incidence of the marker Salmonella.
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How to cite this article:
J.A. Cason, R.J. Buhr, L.J. Richardson and N.A. Cox, 2007. Internal and External Carriage of Inoculated Salmonella in Broiler Chickens. International Journal of Poultry Science, 6: 952-954.
DOI: 10.3923/ijps.2007.952.954
URL: https://scialert.net/abstract/?doi=ijps.2007.952.954
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