Molecular identification of the most frequent pathotypes of in calves with diarrhoea in the Cajamarca region of Peru.

Background: Colibacillosis caused by causes significant economic losses in the livestock sector worldwide and is one of the calves' leading causes of diarrhea.

Aim: This study aimed to identify the most frequent molecularly pathotypes in calves with diarrhea in six provinces of the Cajamarca region in the northern highlands of Peru.

Methods: Twenty-eight herds of dairy cattle under a semi-intensive rearing system were evaluated; 95 samples were isolated from calves with diarrhea up to the first month of life, 62 males and 33 females, during the rainy season.