Acta veterinaria Scandinavica · 1977
Susceptibility of foxes to Clostridium botulinum type C and E toxins.
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Yndestad M, Helgebostad A, Loftsgård G
Аннотация
Investigations were performed to determine the exact susceptibility of foxes to Clostridium botulinum type C and E toxins. Doses of 5 mill. MLD type C toxin mixed with the feed did not cause symptoms of botulism in either cubs or adult foxes. Subcutaneous injections of 300,100(0 MLD or more were fatal to cubs, while 750,000 MLD caused the death of all adults. Regarding type E toxin, doses of 1 mill. MLD affected neither cubs nor adults on oral administration. Subcutaneously injected doses of 5,000 MLD or more killed all cubs, while 10,000 MLD was required to produce lethal effect on adult animals. The conclusion made is that foxes are highly resistant to both type C and E Clostridium botulinum toxins following oral application. It is further revealed that foxes are 60–70 times more susceptible to type E than to type C toxin when injected subcutaneously.