<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The aim of this study was to investigate the etiology of subclinical mastitis (SCM) in dairy Jersey cows with the use of bacteriological and molecular identification methods. In the study 121 Jersey and 78 hybrid Jersey cows with SCM were observed in the Samsun district of Turkey. A total of 411 California mastitis test (CMT) positive milk samples from these animals were examined bacteriologically. The prevalence of subclinical mastitis was 54.75% and 67.2% in Jerseys and hybrids, respectively. On bacteriological examination, a total of 92 strains were isolated from 411 milk samples. The most prevalent bacteria were <italic>Staphylococcus</italic> spp. (69.56%). Among them 24 isolates were <italic>Staphylococcus aureus</italic> (26.08%) the other isolates were <italic>Streptococcus dysgalactiae</italic> (23.91%), <italic>Enterococcus spp.</italic> (3.26%) and <italic>Streptococcus agalactiae</italic> (3.26%). All strains were identified with bacteriological culture methods, as well as by Polymerase Chain Reaction (PCR). Gram-negative bacteria were not isolated. In conclusion, the etiology of SCM in full blood and hybrid Jersey dairy cows in Samsun and the prevalence of bacteria were determined. The relatively high prevalence of SCM indicates the potential need for the consideration of some factors contributing to the formation of mastitis (e.g. management) as well as bacterial agents. The present study and further studies may be useful to develop mastitis vaccines by means of providing true vaccine strain sources.</p></abstract>

The aim of this study was to investigate the etiology of subclinical mastitis (SCM) in dairy Jersey cows with the use of bacteriological and molecular identification methods. In the study 121 Jersey and 78 hybrid Jersey cows with SCM were observed in the Samsun district of Turkey. A total of 411 California mastitis test (CMT) positive milk samples from these animals were examined bacteriologically. The prevalence of subclinical mastitis was 54.75% and 67.2% in Jerseys and hybrids, respectively. On bacteriological examination, a total of 92 strains were isolated from 411 milk samples. The most prevalent bacteria were Staphylococcus spp. (69.56%). Among them 24 isolates were Staphylococcus aureus (26.08%) the other isolates were Streptococcus dysgalactiae (23.91%), Enterococcus spp. (3.26%) and Streptococcus agalactiae (3.26%). All strains were identified with bacteriological culture methods, as well as by Polymerase Chain Reaction (PCR). Gram-negative bacteria were not isolated. In conclusion, the etiology of SCM in full blood and hybrid Jersey dairy cows in Samsun and the prevalence of bacteria were determined. The relatively high prevalence of SCM indicates the potential need for the consideration of some factors contributing to the formation of mastitis (e.g. management) as well as bacterial agents. The present study and further studies may be useful to develop mastitis vaccines by means of providing true vaccine strain sources.

Investigation On The Etiology Of Subclinical Mastitis In Jersey And Hybrid Jersey Dairy Cows

Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Samsun-Turkey

Department of Microbiology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Samsun-Turkey

Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay-Turkey

Department of Biometry, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Samsun-Turkey

Acta Veterinaria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

ISPITIVANJE ETIOLOGIJE SUBKLINIČKOG MASTITISA DŽERZEJ I HIBRID DŽERZEJ MLEČNIH KRAVA

The aim of this study was to investigate the etiology of subclinical mastitis (SCM) in dairy Jersey cows with the use of bacteriological and molecular...

Investigation On The Etiology Of Subclinical Mastitis In Jersey And Hybrid Jersey Dairy Cows

Published Online: Sep 30, 2015

Page range: 358 - 370

Received: Dec 10, 2014

Accepted: Apr 08, 2015

DOI: https://doi.org/10.1515/acve-2015-0030

Keywords
etiology, Jersey dairy cow, molecular identification, subclinical mastitis

© Gürler Hande et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Investigation On The Etiology Of Subclinical Mastitis In Jersey And Hybrid Jersey Dairy Cows

Published Online: Sep 30, 2015

Page range: 358 - 370

Received: Dec 10, 2014

Accepted: Apr 08, 2015

DOI: https://doi.org/10.1515/acve-2015-0030

Keywordsetiology, Jersey dairy cow, molecular identification, subclinical mastitis

© Gürler Hande et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
etiology, Jersey dairy cow, molecular identification, subclinical mastitis