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- Title
Screening commercial teat disinfectants against bacteria isolated from bovine milk using disk diffusion.
- Authors
Fitzpatrick, Sarah Rose; Garvey, Mary; Jordan, Kieran; Flynn, Jim; O'Brien, Bernadette; Gleeson, David
- Abstract
Background and Aim: Teat disinfection is an important tool in reducing the incidence of bovine mastitis. Identifying the potential mastitis-causing bacterial species in milk can be the first step in choosing the correct teat disinfectant product. The objective of this study was to screen commercial teat disinfectants for inhibition against mastitis-associated bacteria isolated from various types of milk samples. Materials and Methods: Twelve commercially available teat disinfectant products were tested, against 12 mastitisassociated bacteria strains isolated from bulk tank milk samples and bacterial strains isolated from clinical (n=2) and subclinical (n=3) quarter foremilk samples using the disk diffusion method. Results: There was a significant variation (7-30 mm) in bacterial inhibition between teat disinfection products, with products containing a lactic acid combination (with chlorhexidine or salicylic acid) resulting in the greatest levels of bacterial inhibition against all tested bacteria (p<0.05). Conclusion: In this study, combined ingredients in teat disinfection products had greater levels of bacterial inhibition than when the ingredients were used individually. The disk diffusion assay is a suitable screening method to effectively differentiate the bacterial inhibition of different teat disinfectant products.
- Subjects
BOVINE mastitis; DISINFECTION &; disinfectants; DISC diffusion tests (Microbiology); SALICYLIC acid; LACTIC acid; MILK; BACTERIA
- Publication
Veterinary World, 2019, Vol 12, Issue 5, p629
- ISSN
0972-8988
- Publication type
Article
- DOI
10.14202/vetworld.2019.629-637