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Titolo:
Prevalence of subclinical intramammary infection caused by Staphylococcus epidermidis in a commercial dairy goat herd
Autore:
Contreras, A; Paape, MJ; Miller, RH;
Indirizzi:
Univ Murcia, Fac Vet, E-30071 Murcia, Spain Univ Murcia Murcia Spain E-30071 Murcia, Fac Vet, E-30071 Murcia, Spain ARS, Immunol & Dis Res Lab, USDA, Beltsville, MD 20705 USA ARS BeltsvilleMD USA 20705 & Dis Res Lab, USDA, Beltsville, MD 20705 USA
Titolo Testata:
SMALL RUMINANT RESEARCH
fascicolo: 3, volume: 31, anno: 1999,
pagine: 203 - 208
SICI:
0921-4488(199902)31:3<203:POSIIC>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATIC-CELL COUNTS; ARTHRITIS-ENCEPHALITIS VIRUS; MILK; LACTATION; MASTITIS; PATHOGENS; PARITY; UDDER; STAGE;
Keywords:
dairy goats; Staphylococcus epidermidis; somatic cell count; caprine arthritis-encephalitis virus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Contreras, A Univ Murcia, Fac Vet, E-30071 Murcia, Spain Univ Murcia Murcia Spain E-30071 Vet, E-30071 Murcia, Spain
Citazione:
A. Contreras et al., "Prevalence of subclinical intramammary infection caused by Staphylococcus epidermidis in a commercial dairy goat herd", SMALL RUMIN, 31(3), 1999, pp. 203-208

Abstract

One herd with 138 lactating goats that had a high somatic cell count (SCC)in bulk tank milk was studied. Foremilk was sampled for bacteriology and SCC at two samplings 28 days apart on the Dairy Herd Improvement Associationtest day. Blood samples were obtained for serological analyses of caprine arthritis-encephalitis virus. Bacterial intramammary infection (IMI) was diagnosed when the same pathogen was isolated twice from the same udder half. The prevalence of IMI was 34%. Most of the pathogens isolated (95.7%) wereStaphylococcus spp. Staphylococcus epidermidis was the predominant species(66.7%), and most of these had similar biochemical profiles. Seroprevalence of caprine arthritis-encephalitis virus infection as assayed by agar gel immunodiffusion was 94.3%. Composite SCC as compiled by the Dairy Herd Improvement Association averaged 10(6)/ml for the first sampling and 1.27x10(6)/ml for the second sampling. Uninfected right and left udder halves had a lower foremilk SCC (1.3 and 1.0x10(6)/ml, respectively) than the infected right and left udder halves (1.74 and 1.66x10(6)/ml), respectively, but only in the left halves was the difference significant. Halves infected by S. epidermidis averaged higher SCC (1.8x10(6)/ml) than the halves infected by other staphylococci (1.5 x 10(6)/ml). Milk SCC increased as parity increased. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 19:59:12