Mad kudus

 作者:杨数     |      日期:2019-03-02 07:09:00
Five of London Zoo’s greater kudus – a type of African antelope – have now been diagnosed as having BSE, the ‘mad cow disease’ that has become epidemic in Britain. The first kudu died in 1989 and was thought to have contracted the disease through feed made from rendered down animal remains. Her daughter was later found to be infected, probably during birth. The latest three cases, described in The Veterinary Record, were all male animals and none had been fed on ruminant protein, a practice banned in 1988. One male developed the neurotic symptoms familiar in cows and was put down. It was found to have the telltale fibrils and holes in its brain tissue. Two more male kudus were destroyed because a herd can have only one adult male and no other zoos wanted them. Postmortems revealed the beginnings of vacuolation in the brain. The three new cases suggest that the kudus acquired the disease by some form of trans-mission between animals,