PROLIFERATIVE ENTEROPATHIES (ILEITIS) - A COMPLEX OF PORCINE INTESTINAL ADENOMATOSIS - POSSIBILITIES OF THE LABORATORY DIAGNOSIS

The authors have been reported a new disease complex observed during t he pathological examinations carried out to diagnose swine dysentery. The pathological changes affected the intestines from the distal part of ileum until the beginning of appendix and caecum. Four pathological pictures can be differentiated according to that adenomatosis, ol inf lammatory, proliferative, as well as degenerative alterations are the most significant in them: porcine intestinal adenomatosis (PIA), regio nal ileitis: necrotic enteritis and proliferative haemorrhagic enterop athy. Usually in older stocks, diarrhoea and weakening are the common causes of death losses. The causative organism is Lawsonia intracellul aris (''Campylobacter-like organism'' or ''ileal symbiont bacterium'') . Diagnosis of cases with negative or non-characteristic pathological findings is difficult. The most reliable test is the PCR test carried out with feces or sections of intestines. At the authors' laboratory, a modified Ziehl-Neelsen stain method has been used for the demonstrat ion of the causative organism in the intestinal wall.