The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk
We aimed to evaluate the impact of selective dry cow therapy (SDCT) (protocol 1: antimicrobial combined with internal teat sealant (ITS); vs. protocol 2: ITS alone) on bacterial diversity and the abundance of quarter milk. Eighty high production cows (parity ≤ 3 and an average milk yield of 36.5 kg/...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Veterinary Sciences |
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| Online Access: | https://www.mdpi.com/2306-7381/9/10/550 |
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| author | Juliano L. Goncalves Juliana Young Renata de F. Leite Carlos E. Fidelis Priscila A. Trevisoli Luiz L. Coutinho Nathália C. C. Silva Roger I. Cue Vera Lucia Mores Rall Marcos V. dos Santos |
| author_facet | Juliano L. Goncalves Juliana Young Renata de F. Leite Carlos E. Fidelis Priscila A. Trevisoli Luiz L. Coutinho Nathália C. C. Silva Roger I. Cue Vera Lucia Mores Rall Marcos V. dos Santos |
| author_sort | Juliano L. Goncalves |
| collection | DOAJ |
| description | We aimed to evaluate the impact of selective dry cow therapy (SDCT) (protocol 1: antimicrobial combined with internal teat sealant (ITS); vs. protocol 2: ITS alone) on bacterial diversity and the abundance of quarter milk. Eighty high production cows (parity ≤ 3 and an average milk yield of 36.5 kg/cow/day) from the largest Brazilian dairy herd available were randomly selected; milk quarter samples were collected for microbiological culture (MC) on the day of drying-off (<i>n</i> = 313) and on day 7 post-calving (<i>n</i> = 313). Based on the results of the MC before and after calving, 240 quarters out of 313 were considered healthy, 38 were cured, 29 showed new infections and 6 had persistent infections. Mammary quarters were randomly selected based on intramammary information status and SDCT protocols for bacterial diversity analyses. The bacterial diversity was similar when comparing both healthy and cured quarters submitted to both drying-off protocols. Despite healthy cows that were treated at dry-off using only teat sealant showing no alteration in the alpha and beta bacterial diversity, they did show a higher abundance of bacterial groups that may be beneficial to or commensals of the mammary gland, which implies that antibiotic therapy should be reserved for mammary quarters with a history of mastitis. |
| first_indexed | 2024-03-09T19:24:29Z |
| format | Article |
| id | doaj.art-ffda6c1005d142e0939c4bde067dee27 |
| institution | Directory Open Access Journal |
| issn | 2306-7381 |
| language | English |
| last_indexed | 2024-03-09T19:24:29Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Veterinary Sciences |
| spelling | doaj.art-ffda6c1005d142e0939c4bde067dee272023-11-24T03:06:31ZengMDPI AGVeterinary Sciences2306-73812022-10-0191055010.3390/vetsci9100550The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter MilkJuliano L. Goncalves0Juliana Young1Renata de F. Leite2Carlos E. Fidelis3Priscila A. Trevisoli4Luiz L. Coutinho5Nathália C. C. Silva6Roger I. Cue7Vera Lucia Mores Rall8Marcos V. dos Santos9Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Sciences, University of São Paulo (USP), Pirassununga, São Paulo 13635-900, BrazilDepartment of Bacteriology, University of Wisconsin-Madison (UW), Madison, WI 53706, USADepartment of Animal Nutrition and Production, School of Veterinary Medicine and Animal Sciences, University of São Paulo (USP), Pirassununga, São Paulo 13635-900, BrazilDepartment of Animal Nutrition and Production, School of Veterinary Medicine and Animal Sciences, University of São Paulo (USP), Pirassununga, São Paulo 13635-900, BrazilLuiz de Queiroz College of Agriculture, University of São Paulo (USP), Piracicaba, São Paulo 13418-900, BrazilLuiz de Queiroz College of Agriculture, University of São Paulo (USP), Piracicaba, São Paulo 13418-900, BrazilDepartment of Food Science and nutrition, Faculty of Food Engineering, University of Campinas, Campinas, São Paulo 13083-862, BrazilDepartment of Animal Science, Macdonald Campus, McGill University, Quebec, QC H9X 3V9, CanadaDepartment of Chemical and Biological Sciences, Institute of Biosciences, Sao Paulo State University, Botucatu, São Paulo 18618-689, BrazilDepartment of Animal Nutrition and Production, School of Veterinary Medicine and Animal Sciences, University of São Paulo (USP), Pirassununga, São Paulo 13635-900, BrazilWe aimed to evaluate the impact of selective dry cow therapy (SDCT) (protocol 1: antimicrobial combined with internal teat sealant (ITS); vs. protocol 2: ITS alone) on bacterial diversity and the abundance of quarter milk. Eighty high production cows (parity ≤ 3 and an average milk yield of 36.5 kg/cow/day) from the largest Brazilian dairy herd available were randomly selected; milk quarter samples were collected for microbiological culture (MC) on the day of drying-off (<i>n</i> = 313) and on day 7 post-calving (<i>n</i> = 313). Based on the results of the MC before and after calving, 240 quarters out of 313 were considered healthy, 38 were cured, 29 showed new infections and 6 had persistent infections. Mammary quarters were randomly selected based on intramammary information status and SDCT protocols for bacterial diversity analyses. The bacterial diversity was similar when comparing both healthy and cured quarters submitted to both drying-off protocols. Despite healthy cows that were treated at dry-off using only teat sealant showing no alteration in the alpha and beta bacterial diversity, they did show a higher abundance of bacterial groups that may be beneficial to or commensals of the mammary gland, which implies that antibiotic therapy should be reserved for mammary quarters with a history of mastitis.https://www.mdpi.com/2306-7381/9/10/550antibiotic resistanceselective dry cow therapyinternal teat sealantbacterial diversitynew intramammary infection |
| spellingShingle | Juliano L. Goncalves Juliana Young Renata de F. Leite Carlos E. Fidelis Priscila A. Trevisoli Luiz L. Coutinho Nathália C. C. Silva Roger I. Cue Vera Lucia Mores Rall Marcos V. dos Santos The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk Veterinary Sciences antibiotic resistance selective dry cow therapy internal teat sealant bacterial diversity new intramammary infection |
| title | The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk |
| title_full | The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk |
| title_fullStr | The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk |
| title_full_unstemmed | The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk |
| title_short | The Impact of Selective Dry Cow Therapy Adopted in a Brazilian Farm on Bacterial Diversity and the Abundance of Quarter Milk |
| title_sort | impact of selective dry cow therapy adopted in a brazilian farm on bacterial diversity and the abundance of quarter milk |
| topic | antibiotic resistance selective dry cow therapy internal teat sealant bacterial diversity new intramammary infection |
| url | https://www.mdpi.com/2306-7381/9/10/550 |
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