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Casein hydrolyzate for drying-off lactating mammary quarters in cows with chronic mastitis

Published online by Cambridge University Press:  17 May 2021

Melina M. Barcelos ,
Gustavo Freu ,
Bruna G. Alves ,
Camylla P. Monteiro  and
Marcos V. Santos
Melina M. Barcelos
Affiliation:
Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
Gustavo Freu
Affiliation:
Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
Bruna G. Alves
Affiliation:
Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
Camylla P. Monteiro
Affiliation:
Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
Marcos V. Santos*
Affiliation:
Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
*
Author for correspondence: Marcos V. dos Santos, Email: mveiga@usp.br
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Abstract

In this research communication we address the hypothesis that a single intramammary infusion of casein hydrolyzate (CH) would have a similar effect to three intramammary infusions of CH for drying-off quarters with chronic mastitis (CM) during lactation. Sixty cows with CM were selected and randomly distributed into two treatment groups: (a) three intramammary CH infusions (100 mg, 50 ml per infusion, with 24-h intervals) or (b) single intramammary CH infusion (300 mg, 50 ml). Milk samples from the treated and untreated quarters were collected for microbiological culture and somatic cell count (SCC) before and after CH infusions. Milk yield was recorded and a manual pressure index measurement was used to evaluate cessation of lactation. Of the 60 quarters selected, 43 (71.67%) had positive microbiological culture. The quarters treated with three intramammary CH infusions had higher udder pressure index than those treated with single CH infusion. However, the average milk yield and composite SCC of three functional quarters were not different among treatments. Therefore, a single infusion of CH has the potential to be used as an alternative method for drying-off mammary quarters with CM during lactation.

Keywords

Bovine mastitischronic intramammary infectionintramammary treatmentrelapsing mastitis
Type
Research Article
Information
Journal of Dairy Research , Volume 88 , Issue 2 , May 2021 , pp. 185 - 188
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of Hannah Dairy Research Foundation

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References

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