| Abstract: | An anti-epizootic field test was applied to industrialised pig farms in the region of Wroc?aw, Poland, to test the effectiveness of a pentavalent EDTA (calcium disodium edetate)--sodium vaccine extracted from Escherichia coli strains with pathogenicity to swine. The vaccine had been received from a centre in Berlin-Buch, GDR. The vaccine failed to provide any protection, when orally applied to nursed piglets. However, both morbidity and mortality were reduced and, thus, an anti-epizootic effect on nursed piglets produced, when the vaccine had been injected intramuscularly to the pregnant mother animals, prior to farrowing. In weaned piglets morbidity was sucessfully reduced by both oral as well as intramuscular administration. |
