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Skvortsova, E. G.
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Influence of sapropel on the activity of intestinal peptidases of broiler chickens Kuz'mina, V. V.; Skvortsova, E. G.; Pivovarova, E. A.; Bushkareva, A. S.; Vostrova, U. A.; Poltoratskaya, A.V.
Journal of the Indonesian Tropical Animal Agriculture Vol 46, No 1 (2021): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.46.1.67-74

Abstract

At the beginning of the experiment, the weight of weekly cockerels of the Hisex White egg cross (n = 90) was 64.6 ± 0.47 g. At the age of one week old, 3 groups (30 birds in each group) were formed. They received complete feed. The first group served as a control. The chickens of the second and third groups received combined fodder, in which 3% and 5% of the feed weight was replaced with dry sapropel. The dry sapropel (3% of the daily feed weight) increased the activity of casein-lytic and hemoglobin-lytic peptidases in the chyme by 1.5 (Р<0.05), in large intestine mucosa by 1.3 (Р<0.05) and in small intestine mucosa by 1.7 times (Р<0.01) compared with the control. The increase of sapropel concentration in feed up to 5% did not lead to a further increase in the activity of peptidases. The activity of peptidases were minimal at pH 5 and pH 12 and reached maximal at pH 7–8. The optimal dose of dry sapropel introduced into the diet of chickens to that stimulated the digestive processes is 3% of the mass of feed.
Effect of a probiotic preparation on the composition of the intestinal microbiome of rabbits Skvortsova, E. G.; Filinskaya, O. V.; Bushkareva, A. S.; Bogdanova, A. A.; Mostofina, A. V.; Pivovarova, E. A.
Journal of the Indonesian Tropical Animal Agriculture Vol 50, No 3 (2025): September
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.50.3.168-180

Abstract

In this work, we studied the effect of a probiotic supplement containing bacteria of the Bacillus amyloliquefaciens strain (Vetom 2) on the intestinal microbiome composition of rabbits. Rabbits of the experimental group, in addition to compound feed together with water, received the Vetom 2.0 probi-otic feed additive in the amount of 50 mg / kg of live weight of 10 days every 30 days for four months. Genomic DNA was isolated from the intestines of rabbits using a set of ExtractDNABlood&Cells Am-plification of variable regions V3–V4 of the 16S rRNA gene using universal primers and subsequent sequencing on the IlluminaMiSeq platform. Bioinformatic analysis was carried out in the QIIME2 en-vironment. The control and experimental groups of crossbred rabbits were dominated by five phyla of intestinal bacteria: Bacillota, Pseudomonadota, Bacteroidota, Actinomycetota, and Verrucomicrobiota. The following taxa prevailed at the level of the orders: Eubacteriales, Pseudomonadales, Bacteroi-dales, Caryophanales, Enterobacteriales. At the family level, the most important taxa showing signifi-cant differences between the groups were Oscillospiraceae, Lachnospiraceae, and Campylobacterace-ae. The probiotic supplement contributed to an increase in the proportion of positive microorganisms, a decrease in the proportion of conditionally pathogenic, and an increase in the biological diversity of the intestinal microbiocenosis.
Co-Authors Bogdanova, A. A. Bushkareva, A. S. Filinskaya, O. V. Kuz'mina, V. V. Mostofina, A. V. Pivovarova, E. A. Poltoratskaya, A.V. Vostrova, U. A.