EN
The purpose of the studies was to determine the rate of rotaviral infection in piglets with the signs of diarrhoea. Samples of faeces were collected from 531 piglets from selected farms, aged 2—8 weeks. The examinations were performed by the ELISA method. The rotaviral antigen was found in piglets from 10 out of 11 farms under study. The frequency of virus occurrence ranged within 6—52% and was highest on large scale farms with the highest number of animals.