NDLI: Milk yield and associated economic losses in quarters with subclinical mastitis due to Staphylococcus aureus in Ethiopian crossbred dairy cows.

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Milk yield and associated economic losses in quarters with subclinical mastitis due to Staphylococcus aureus in Ethiopian crossbred dairy cows.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Tesfaye, Gebreyohannes Y. Regassa, Fekadu Gudeta Kelay, B.
Spatial Coverage	Ethiopia
Description	Country affiliation: Ethiopia Author Affiliation: Tesfaye GY ( MOA, Agricultural and Rural Development, Bahir Dar, Amhara Regional State, Ethiopia.)
Abstract	The objective of the study was to estimate the prevalence and losses associated with subclinical mastitis (SCM) caused by Staphylococcus aureus in Ethiopian crossbred dairy cows. A split-udder trial was carried out to determine milk yield losses in udder quarter with S. aureus-caused SCM. Each quarter of the study cows was examined using the California Mastitis Test (CMT) and quarter milk production was measured over a period of 8 days. Milk yield losses for CMT positive quarters were estimated by comparing production of quarters with CMT score 0. Mean milk yield for uninfected healthy quarters was 1.66 kg per milking (95% CI, 1.66-1.55 kg per milking), and the rate of milk reduction for quarters with CMT scores of 1+, 2+, and 3+ was 25%, 33%, and 48%, respectively. Economic losses at different farm-size levels were calculated by multiplying the prevalence of CMT scores with milk yield losses associated with respective CMT scores. In Debre Ziet dairy herds, a quarter with SCM due to S. aureus lost an average of 34.5% of its potential milk production while the total milk yield loss per cow was estimated at 6.8%. Losses were highest in large-scale (13%) farms and lowest (3.7%) in small-scale. Based on the prevalence, the overall financial loss for each cow per lactation was 984.64 Eth Birr (US\$78.65) and losses in large farms (1,882.40 Eth Birr or US\$150.35) were over 3.5 times the loss in small-size farms. These figures possibly underestimate the potential benefits of mastitis control program as they do not include other direct and indirect costs.
File Format	HTM / HTML
ISSN	00494747
Issue Number	5
Volume Number	42
e-ISSN	15737438
Journal	Tropical Animal Health and Production
Language	English
Publisher	Springer
Publisher Date	2010-06-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Veterinary Medicine Discipline Tropical Medicine Lactation Physiology Mastitis, Bovine Microbiology Milk Staphylococcal Infections Veterinary Staphylococcus Aureus Isolation & Purification Animals Cattle Dairying Ethiopia Epidemiology Female Economics Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Food Animals

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Milk yield and associated economic losses in quarters with subclinical mastitis due to Staphylococcus aureus in Ethiopian crossbred dairy cows

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Milk yield and associated economic losses in quarters with subclinical mastitis due to Staphylococcus aureus in Ethiopian crossbred dairy cows.

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