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Neutrophil and CD4+ milk cell count related to natural incidence of mastitis in Jersey cattle

Published online by Cambridge University Press:  08 July 2021

Zlatina Chengolova ,
Milka Atanasova  and
Tzonka Godjevargova
Zlatina Chengolova*
Affiliation:
Biotechnology Department, “Prof. Dr Asen Zlatarov” University of Burgas, Burgas, Bulgaria
Milka Atanasova
Affiliation:
Biotechnology Department, “Prof. Dr Asen Zlatarov” University of Burgas, Burgas, Bulgaria
Tzonka Godjevargova
Affiliation:
Biotechnology Department, “Prof. Dr Asen Zlatarov” University of Burgas, Burgas, Bulgaria
*
Author for correspondence: Zlatina Chengolova, Email: [email protected]
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Abstract

This Research Communication describes the relation between somatic cells and microbial content in milk from Jersey cattle. Milk samples were classified in groups: healthy, dirty and mastitic (from Staphylococcus spp., Escherichia coli, Coliforms). The somatic cells in each of those groups were analysed by two methods – flow cytometric and automatic fluorescent cell counting. Those methods were compared. Total somatic cell count (SCC), neutrophil count, and lymphocytes with cluster of differentiation 4 (CD4+cells) were determined. There was a positive relationship between microbes and somatic cells. It was noticed that the neutrophil count was generally increased together with SCC, whilst the CD4+ cell count was higher in healthy milk samples (about 8%) compared to mastitic ones (about 3%). Lower number of CD4+ cells (from 1 to 4%) was determined in samples positive for Staphylococcus spp. but with lower SCC (from 2.7 to 4.0 × 105 cells/ml). Also, the number of CD4+ cells in Staphylococcus spp.-positive samples increased (to 4.8%) together with higher SCC, something that was not observed in the other mastitic samples. Knowledge of those relations could be useful for veterinary medical tests in the initial phase of inflammation.

Keywords

CD4+ cellsmastitisneutrophilssomatic cell countStaphylococcus aureus
Type
Research Article
Information
Journal of Dairy Research , Volume 88 , Issue 3 , August 2021 , pp. 334 - 336
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of Hannah Dairy Research Foundation

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