Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces
Calf diarrhea caused by pathogenic <i>Escherichia coli</i> is a major cause of death in calves, with a mortality rate of over 50%. It is crucial to understand the pathogenesis and development of calf diarrhea for its prevention and treatment. We aimed to study the effect of pathogenic &l...
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MDPI AG
2022-04-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/12/8/959 |
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| author | Lina He Chunjie Wang Huasai Simujide Han Aricha Jian Zhang Bo Liu Chen Aorigele |
| author_facet | Lina He Chunjie Wang Huasai Simujide Han Aricha Jian Zhang Bo Liu Chen Aorigele |
| author_sort | Lina He |
| collection | DOAJ |
| description | Calf diarrhea caused by pathogenic <i>Escherichia coli</i> is a major cause of death in calves, with a mortality rate of over 50%. It is crucial to understand the pathogenesis and development of calf diarrhea for its prevention and treatment. We aimed to study the effect of pathogenic <i>E. coli</i> on the flora composition, function, and short-chain fatty acid (SCFA) content of calf feces using a calf diarrhea model. Sixty-four newborn Holstein calves (40–43 kg) were divided into a normal group (NG; <i>n</i> = 32) and a test group (TG; <i>n</i> = 32). At the beginning of the experiment, the TG were orally administered pathogenic <i>E. coli</i> O1 (2.5 × 10<sup>11</sup> CFU/mL, 100 mL) to establish a calf diarrhea model, and the NG were orally administered the same amount of physiological saline solution. The calves of the two groups were subjected to the same feeding and management. Fresh feces samples were collected at different time points and subjected to 16S rRNA high-throughput sequencing and gas chromatography–mass spectrometry to determine the fecal microbial composition and SCFA content. Pathogenic <i>E. coli</i> O1 significantly altered microbiotas composition in the feces of calves, increasing the relative abundance of Proteobacteria and decreasing that of Firmicutes. It also led to a significant increase in the relative abundance of <i>Escherichia-Shigella</i> and a decrease in <i>Lactobacillus</i>, as well as significantly decreased SCFA content. Therefore, we postulate that pathogenic <i>E. coli</i> induces calf diarrhea by causing intestinal florae imbalance and reducing the content of SCFA. |
| first_indexed | 2024-03-09T11:16:00Z |
| format | Article |
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| language | English |
| last_indexed | 2024-03-09T11:16:00Z |
| publishDate | 2022-04-01 |
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| record_format | Article |
| series | Animals |
| spelling | doaj.art-846d877dffd441dd90b019f265301d402023-12-01T00:30:03ZengMDPI AGAnimals2076-26152022-04-0112895910.3390/ani12080959Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf FecesLina He0Chunjie Wang1Huasai Simujide2Han Aricha3Jian Zhang4Bo Liu5Chen Aorigele6College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCalf diarrhea caused by pathogenic <i>Escherichia coli</i> is a major cause of death in calves, with a mortality rate of over 50%. It is crucial to understand the pathogenesis and development of calf diarrhea for its prevention and treatment. We aimed to study the effect of pathogenic <i>E. coli</i> on the flora composition, function, and short-chain fatty acid (SCFA) content of calf feces using a calf diarrhea model. Sixty-four newborn Holstein calves (40–43 kg) were divided into a normal group (NG; <i>n</i> = 32) and a test group (TG; <i>n</i> = 32). At the beginning of the experiment, the TG were orally administered pathogenic <i>E. coli</i> O1 (2.5 × 10<sup>11</sup> CFU/mL, 100 mL) to establish a calf diarrhea model, and the NG were orally administered the same amount of physiological saline solution. The calves of the two groups were subjected to the same feeding and management. Fresh feces samples were collected at different time points and subjected to 16S rRNA high-throughput sequencing and gas chromatography–mass spectrometry to determine the fecal microbial composition and SCFA content. Pathogenic <i>E. coli</i> O1 significantly altered microbiotas composition in the feces of calves, increasing the relative abundance of Proteobacteria and decreasing that of Firmicutes. It also led to a significant increase in the relative abundance of <i>Escherichia-Shigella</i> and a decrease in <i>Lactobacillus</i>, as well as significantly decreased SCFA content. Therefore, we postulate that pathogenic <i>E. coli</i> induces calf diarrhea by causing intestinal florae imbalance and reducing the content of SCFA.https://www.mdpi.com/2076-2615/12/8/959pathogenic <i>Escherichia coli</i> O1calfdiarrheaintestinal floraeshort-chain fatty acids |
| spellingShingle | Lina He Chunjie Wang Huasai Simujide Han Aricha Jian Zhang Bo Liu Chen Aorigele Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces Animals pathogenic <i>Escherichia coli</i> O1 calf diarrhea intestinal florae short-chain fatty acids |
| title | Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces |
| title_full | Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces |
| title_fullStr | Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces |
| title_full_unstemmed | Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces |
| title_short | Effects of Pathogenic <i>Escherichia coli</i> Infection on the Flora Composition, Function, and Content of Short-Chain Fatty Acids in Calf Feces |
| title_sort | effects of pathogenic i escherichia coli i infection on the flora composition function and content of short chain fatty acids in calf feces |
| topic | pathogenic <i>Escherichia coli</i> O1 calf diarrhea intestinal florae short-chain fatty acids |
| url | https://www.mdpi.com/2076-2615/12/8/959 |
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