9-5 |
Survivability of Campylobacter jejuni under commercial conditions - epidemiologic implications. |
S. M. SHANE, Dept. of Epidemiology & Community Health, Louisiana State Univ., School of Veterinary Medicine, Baton Rouge, LA 70803 Campylobacter remains viable in non-chlorinated, contaminated water for prolonged periods, representing an important route of infection for flocks. A "viable but non-culturable" form has been proposed. Litter with a moisture level above 30%, corresponding to an available water value exceeding 0.9 may contain sufficient viable Campylobacter to infect broiler flocks if intercrop intervals are less than 7 days. Pelleted broiler feed and also breeder and commercial hen diets which are in mash form do not support the survival of Campylobacter jejuni which is sensitive to dessication. Accordingly feed is not a suitable vehicle for infection of flocks under practical conditions. Campylobacter spp. retain viability on chicken carcasses and processed products for up to 28 days at 4 C representing a risk of infection for consumers.
Session 9, Survival of pathogenic microorganisms in hostile environments
|