Bovine Neonatal Enteritis

Neonatal enteritis is one of the most common causes of mortalities in calves up to one month of age and it is generally caused by the interaction of a number of infectious enteropathogens and predisposing factors. These section shows the most common infectious agents diagnosed in calves under one month.

Table 8.1: Bovine Neonatal Enteritis Organisms
Rotavirus 1276 602 32.1
Cryptosporidia 1501 363 19.5
Campylobacter Jejuni 1565 183 10.5
Giardia 923 66 6.7
E.Coli K99 1248 13 1.0
Salmonella Culture 1864 8 0.4
Coronavirus 1856 6 0.3 


Cryptosporidial Oocysts in a faecal smear


Figure 8.1: Cryptosporidial oocysts in a faecal smear. Photo:Cosme Sánchez-Miguel


Bovine Neonatal Enteritis

Figure 8.2: The relative frequency of enteropathogenic agents identified in calf faecal samples tested by DAFM laboratories in 2017


The significance of Giardia and Campylobacter jejuni as a cause of calf enteritis is doubtful. Both are a common cause of gastroenteritis in humans and they are routinely surveyed in neonatal faecal samples.