Topicality of the intravital diagnosis of ollulanosis in pigs

Abstract

Swine ollulanosis is a parasitic disease caused by the nematode Ollulanus suis and is accompanied by a stomach disorder, inflammatory processes of the mucous membrane, which lead to the development of predominantly chronic forms of gastritis. As a result of the latter, the conversion of feed to diseased animals is reduced, which does not allow completely realize their genetic potential and damage of the pig industry. Coprological routine methods for the diagnosis of ollulanosis in pigs are ineffective, so in this study we have developed and tested new methods for lifelong diagnosis. In the 2016-2017 years, the effectiveness of three intravital methods of diagnosis ollulanosis was tested: gastric lavage of pigs, gastric mucus selection with the aid of a self-developed probe, and the selection of biopsies of the gastric mucosa using gastroscope. Obtained, using all three methods, samples were thoroughly examined under a microscope to detect and calculate nematodes Ollulanus suis. According to the results of researches of 192 heads of pigs from the farms of the Kiev region, we established the presence of Ollulanus suis in the stomachs of 108 animals (55,1%). Among the life-time diagnostic methods, the best results were the study of gastric mucosal biopsies and gastric mucus samples, which allowed detecting 89.6 and 86.8% of diseased animals, respectively. The least effective was gastric lavage, only 38.3% of the affected animals were found. It was also found to increase the intensity and severity of the disease in pigs with age.