| Autor: |
Chemaly M; Laboratoire d'Etude de Recherche Avicole et Porcine, Unité Hygiène et Qualité des Produits Avicole et Porcin, BP 53-22440 Ploufragan, France. m.chemaly@ploufragan.afssa.fr, Toquin MT, Le Nôtre Y, Fravalo P |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of food protection [J Food Prot] 2008 Oct; Vol. 71 (10), pp. 1996-2000. |
| DOI: |
10.4315/0362-028x-71.10.1996 |
| Abstrakt: |
This study aimed to update and create a data set from laying hens and broilers regarding contamination by Listeria monocytogenes. Two hundred laying-hen flocks were sampled, with 88 flocks reared in cages and 112 reared on the floor. One hundred forty-five broiler flocks were sampled, with 85 conventional and 60 free-range flocks. A total of 774 and 725 samples were analyzed from laying hens and broilers, respectively. L. monocytogenes was detected in 31 of 200 flocks, yielding an estimated prevalence of 15.5% in laying-hen flocks. Among positive flocks, there appeared a significant (P = 0.004) difference between caged and floor-reared hens, with a higher detection in dust samples from floor-reared hens. In positive caged hen flocks, significant (P = 0.028) differences between dust and fecal samples appeared, with a higher detection in feces than in dust samples. In broiler flocks, L. monocytogenes was isolated in 46 of 145 flocks, yielding an estimated prevalence of 32% (28% in conventional flocks versus 37% in the free-range flocks). L. monocytogenes was isolated in samples taken from conventional flocks with a lower frequency than in free-range flocks (13 versus 18%, respectively). The serotyping of L. monocytogenes strains showed that the majority belonged to type 1/2a in laying-hen flocks (74.3%) and in broiler flocks (40.5%). A significant difference (P = 0.007) between laying hens and broilers was shown for serogroup 4 and for serovar 1/2b (P = 0.007); these serogroups were more prevalent in broilers (40%) than in laying hens (5.7%). |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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