COMPARATIVE METHODS FOR DETECTION OF SUBCLINICAL MASTITIS AT DAIRY COWS IN ORDER TO IMPROVE MILK QUALITY

Trajkovska, Biljana and Risteski, Blagoja and Karapetkovska-Hristova, Vesna (2023) COMPARATIVE METHODS FOR DETECTION OF SUBCLINICAL MASTITIS AT DAIRY COWS IN ORDER TO IMPROVE MILK QUALITY. In: AGBIOL 2023 Conference, 18-20 September, Edirne, Turkey.

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Abstract

The control of the health status of the udder is a significant element for obtaining a hygienically
and safety milk. The aim of our research was to make a comparative analysis of the methods
for determining subclinical mastitis, such as CMT and somatic cell count (SCC/mL) in
comparison with electrical conductivity (EC) and lactose as an indirect method for detection of
subclinical mastitis. It was determined that by increasing the number of somatic cells in milk
(SCC/mL), the percentage of lactose in milk decreases from 4.80% to 4.13%, and the electrical
conductivity increases from 4.21 mS/cm to 4.95 mS/cm. The number of somatic cells obtained
using the MKC EN ISO 13366-2:2010 method was taken as a standard method for determining
the somatic cells in milk, and based on these results, the sensitivity of the other methods was
further determined. The results indicate that the California mastitis test (CMT) has 57%
sensitivity and 88% specificity, while measuring the electrical conductivity (EC) has a
sensitivity of 82% and a specificity of 50%. Whereas the sensitivity of the lactose is 79%, and
the specificity is 60%. The sensitivity of the test, the so-called true positive rate, or probability
of detection, expresses the percentage of correctly identified infected quarters. According to
this with determination of EC and the percentage of lactose, more reliable results are obtained
compared to the CMT test. On the other hand the specificity of the test, the ability to detect all
negative samples, i.e. healthy cows, better results were obtained with the CMT test.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Scientific Fields (Frascati) > Agricultural Sciences > Animal and diary science
Divisions:	Faculty of Biotechnical Sciences
Depositing User:	Prof. d-r Biljana Trajkovska
Date Deposited:	18 Oct 2023 20:49
Last Modified:	18 Oct 2023 20:49
URI:	https://eprints.uklo.edu.mk/id/eprint/9032

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