The study was carried out on 28 days old piglets divided into two groups of forty each. One group received fodder supplemented with exogenous 0.18% HCl and a control group was fed on unacidified fodder. The piglets were slaughtered at the age of 35, 42, 49 and 56 days. Distinct morphological lesions were found in the gastric mucosa and duodenum of piglets fed on acidified fodder and slaughtered at 49—56 days of age. Histopathological changes included the demaged duodenal villi with cellular infiltration and an increased amount of acid mucin. The gastrointestinal microflora showed a decrease in the number of E. coli and an increase of yeast; the number of Lactobacillus strains remained unchanged.
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