|
Résumé :
|
SUMMARY Serious outbreaks of type C botulism in waterfowl have recently been reported in the Netherlands, Spain and Britain. Recent surveys of Clostridium botulinum in the mud of British lakes and waterways have revealed a prevalence that was surprisingly high – much higher than that found in surveys of soil made between 1922 and 1942. In general type B was more common than types C and E, except in the Norfolk Broads where contamination with all three types was widespread. Type D was rare and type A apparently absent. In the London area, lake mud was shown to be a much more favourable environment than soil for Cl. botulinum. However, mud samples from the Camargue (France) showed only a very low prevalence, despite the constant seeding of the environment that presumably occurs through the intermediary of migrant birds. This suggests that mud in certain areas may be inhibitory.
|
