GJDFM Navigation
About
Publication Ethics
Call For Paper
Editorial Board
Guide to Authors
Scope
Editorial Workflow
Submit Manuscript
Archives
Viewing Options
[View Abstract]
[View Full Text PDF]
[Download Full Text PDF]
Authors Articles on Google Scholar
Dinaw Bekele Selassie
Authors Articles on Pubmed
Dinaw Bekele Selassie
Preferences
Email this Article to a friend
Print this Article
Statistics
Viewed: 69
Forwarded: 0
Printed: 43
Downloaded: 98
Browse Journals By Category
Agricultural Sciences
Biological Sciences
Education
Engineering
Legal Studies
Medical Sciences
Physical Sciences
Social Sciences

Newsletters Subscription

Global Journal of Dairy Farming and Milk Production

ISSN: 2449-1861 Vol. 4 (6), pp. 171-176, June, 2016.                                                          

 

Full Length Research Paper

 

Occurrence of subclinical mastitis in lactating cows in selected commercial dairy farms of Holeta district

 

Dinaw Bekele Selassie

 

Accepted 01 May, 2016

A cross-sectional study was carried out to determine the prevalence of subclinical mastitis in lactating dairy cows from August 10, 2011 to May 25, 2012 in three purposively selected commercial dairy farms in Holeta district, Ethiopia. The study was carried out through field screening surveys by California mastitis test for each quarter milk sample, followed by bacteriological examination to identify the causative agents of intra-mammary infection. A total of 546 milking cows were examined, out of which 224 (41.02%) were found positive for subclinical mastitis on the basis of California mastitis test. Milk samples collected from 224 positive cows were subjected to microbiological culture for the isolation of pathogenic bacteria. One hundred eighty three (81.7%) of the samples were found positive for bacterial isolation. The major isolate pathogens were Staphylococcus aureus (13.8%), Streptococcus uberis (12.1%), Staphylococcus epidermidis (11.7%), Escherichia coli (11.6%), Streptococcus dysagalactiae (10.6%), Pseudomonas aeruginosa (9.7%), E. coli O157:H7 (6.9%), Micrococcus species (6.5%) and Streptococcus agalactiae (6.4%) and others (10.7%). Subclinical mastitis is endemic in Holeta dairy farms and thereby necessary measures are needed to be taken to prevent further losses.

Key words: California mastitis test, bacteriological culture, prevalence, subclinical mastitis.