Signs of yersiniosis in yearling animals are a tucked up appearance and faecal staining around the backside.
Yersiniosis: A disease for yearling calves over the summer
Yersiniosis sp is a bacteria that causes outbreaks of enteritis or diarrhoea in cattle — often single cases although we see outbreaks in weaner calves shifted to grazing in the Western Bay of Plenty.
It is a disease that mainly involves
young animals after weaning (deer too) during inclement weather.
Infection is by the faecal-oral route. For the organism to cause disease, contributing factors such as inclement weather, management stress (eg. mustering, transport, calving), feed shortages and concurrent parasitism need to be present.
It sometimes is notable that it can occur on well fed animals on lush green pasture. Some circumstantial evidence suggests active Bovine Viral Diarrhoea Virus (BVDV) infection can allow Yersinia infection to develop. Animals with diarrhoea tend to cause heavy environmental contamination, resulting in rapid exposure to other susceptible animals.
