Composition of the teat canal and intramammary microbiota of dairy cows subjected to antimicrobial dry cow therapy and internal teat sealant

Journal of Dairy Science
Hooman DerakhshaniEhsan Khafipour

Abstract

Antimicrobial dry cow therapy (DCT) is an important component of mastitis control programs aimed to eliminate existing intramammary infections and prevent the development of new ones during the dry period. However, to what extent the microbiota profiles of different niches of the udder change during the dry period and following administration of DCT remains poorly understood. Therefore, the main objective of the present study was to qualitatively evaluate dynamics of the microbiota of teat canal (TC) and mammary secretions (i.e., milk and colostrum) of healthy udder quarters subjected to DCT using a long-acting antimicrobial product, containing penicillin G and novobiocin, in combination with internal teat sealant. To this end, TC swabs (n = 58) and their corresponding milk (n = 29) and colostrum samples (n = 29) were collected at the time of drying off and immediately after calving from clinically healthy udder quarters of Holstein dairy cows from a commercial dairy farm. All samples were subjected to DNA extraction and high-throughput sequencing of the V1-V2 hypervariable regions of bacterial 16S rRNA genes. Overall, shifts were more pronounced within the microbiota of mammary secretions than the TC. In particular, microbiota...Continue Reading

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Citations

Jun 7, 2019·Veterinary Research·Suvi TaponenSatu Pyörälä
Mar 3, 2020·Frontiers in Microbiology·Georgios OikonomouSergine Even
Jan 30, 2021·The Veterinary Quarterly·Khan SharunWanpen Chaicumpa
May 4, 2021·Frontiers in Veterinary Science·Jeroen De BuckHerman W Barkema
Jul 3, 2021·Animals : an Open Access Journal From MDPI·Leonida KajdičMaja Zakošek Pipan

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