Salmonella aberdeen infection in cattle associated with human sewage

Salmonella aberdeen was established as the cause of illness in 30 out of a herd of 90 milking cows. The illness was only moderately severe, and all animals responded to treatment.The source of infection was considered to be human sewage effluent overflowing onto grazing land. There was no report of human infection in the area from which the effluent came.