Figure 1

Primary diagnoses at necropsy in 43, 15, 13 and 9 piglets from herd 1, 2, 3 and 4, respectively. The following criteria were used to assign piglets to the respective diagnoses: Enteritis: Intestinal hyperaemia, flaccidity or mucosal lesions and liquid contents in colon. Starvation: Piglets were emaciated and stomachs and intestines were empty. Miscellaneous: All other diagnoses and cases without obvious findings.