NDLI: Use of milk amyloid A in the diagnosis of subclinical mastitis in dairy ewes.

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Use of milk amyloid A in the diagnosis of subclinical mastitis in dairy ewes.

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Use of milk amyloid A in the diagnosis of subclinical mastitis in dairy ewes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Miglio, Arianna Moscati, Livia Fruganti, Gabriele Pela, Michela Scoccia, Eleonora Valiani, Andrea Maresca, Carmen
Description	Country affiliation: Italy Author Affiliation: Miglio A ( Department of Veterinary Clinical Science, University of Perugia, Perugia 06124, Italy.)
Abstract	Subclinical mastitis (SM) is one of the most important diseases affecting dairy ewes worldwide, with negative impact on the animal health, farm income and public health. Animals with SM often remain untreated because the disease may not be revealed. Increase in somatic cell count (SCC) and positive bacteriology for mastitis pathogens in milk samples are indicative of SM but the evidence of only one of these alterations must suggest an uncertain SM (UM). UM is defined when positive bacteriological examination (Latent-SM) or SCC>500 000 cells/ml (non-specific-SM) are detected in milk. Nevertheless, SCC and bacteriological examination are expensive, time consuming and are not yet in use at the farm level in dairy ewes. Recently, a sensitive acute phase protein, amyloid A, displaying multiple isoforms in plasma and different body fluids including mammary secretion (milk amyloid A-MAA), has been investigated as a marker of mastitis in cows and, in a few studies, in sheep. The aim of this trial was to compare the concentration of MAA of single udder-halves in ewes with healthy udder-halves (HU-control group) and naturally occurring subclinical mastitis, both confirmed (SM group) and uncertain (UM groups: Latent-SM and non-specific-SM), for monitoring udder health. The reliability of a specific ELISA kit for the measurement of MAA was also tested. During a 3-month trial period, 153 udder halves were assigned to the experimental groups based on their health status: 25 with SM, 40 with UM (11 with latent-SM and 29 with non-specific-SM) and 88 HU. SCC and bacteriological analysis were performed to establish the control and subclinical mastitis groups. MAA concentrations in milk samples were measured using a specific commercially milk ELISA kit. The data were submitted to statistical analysis. Significant (P<0·05) differences among the groups SM, non-specific-SM and HU were detected with the SM having the highest level and HU the lowest. MAA concentration is affected by the udder health status and is a useful indicator of subclinical mastitis and increased SCC in sheep.
File Format	HTM / HTML
ISSN	00220299
Issue Number	4
Volume Number	80
e-ISSN	14697629
Journal	Journal of Dairy Research
Language	English
Publisher	Cambridge University Press
Publisher Date	2013-11-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Veterinary Medicine Mastitis Diagnosis Milk Chemistry Serum Amyloid A Protein Sheep Diseases Animals Female Metabolism Sheep Journal Article
Content Type	Text
Resource Type	Article
Subject	Medicine Animal Science and Zoology Food Science

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