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Titolo:
Water quality in cattle feedyard playas in winter and summer
Autore:
Purdy, CW; Straus, DC; Parker, DB; Williams, BR; Clark, RN;
Indirizzi:
USDA ARS, Conservat & Prod Res Lab, Bushland, TX 79012 USA USDA ARS Bushland TX USA 79012 vat & Prod Res Lab, Bushland, TX 79012 USA Texas Tech Univ, Hlth Sci Ctr, Dept Microbiol & Immunol, Lubbock, TX 79430USA Texas Tech Univ Lubbock TX USA 79430 biol & Immunol, Lubbock, TX 79430USA W Texas State Univ, Div Agr, Canyon, TX 79016 USA W Texas State Univ Canyon TX USA 79016 niv, Div Agr, Canyon, TX 79016 USA IBT Reference Lab, Lenexa, KS 66214 USA IBT Reference Lab Lenexa KS USA 66214 Reference Lab, Lenexa, KS 66214 USA
Titolo Testata:
AMERICAN JOURNAL OF VETERINARY RESEARCH
fascicolo: 9, volume: 62, anno: 2001,
pagine: 1402 - 1407
SICI:
0002-9645(200109)62:9<1402:WQICFP>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENDOTOXIN EXPOSURE; PIG FARMERS; DUST; BACTERIA; INDUSTRY; HEALTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Purdy, CW USDA ARS, Conservat & Prod Res Lab, PO Drawer 10, Bushland, TX 79012 USA USDA ARS PO Drawer 10 Bushland TX USA 79012 shland, TX 79012 USA
Citazione:
C.W. Purdy et al., "Water quality in cattle feedyard playas in winter and summer", AM J VET RE, 62(9), 2001, pp. 1402-1407

Abstract

Objective-To determine the impact of feedyards on endotoxin concentration,fecal coliform count, and other water quality measurements during winter and summer in feedyard playas (shallow lakes). Sample Population-Water samples obtained from 7 feedyard playas and 3 nonfeedyard control playas. Procedure-Surface water samples were collected from each playa and at various depths from 3 feedyard playas. Endotoxin concentrations, 22 water quality variables, and fecal coliform counts were determined in samples collected in summer and winter from various combinations of playas. Results-Cattle numbers per feedyard ranged from 40,000 to 175,000 head/y. Mean endotoxin concentrations were significantly lower in control playas than in feedyard playas in winter and summer. Endotoxin concentration appeared to be homogenous at various water depths. Values for 20 of 22 water quality variables were higher in the feedyard playas than in control playas in winter and summer. In winter only, mean total fecal coliform concentration in feedyard playas was significantly greater than in control playas. Conclusions and Clinical Relevance-Results indicated that feedyards have the potential to impact water quality in playas, and cattle should not be allowed access to them. Feedyard playa water should not be used under high pressure to settle dust in pens with cattle or to cool cattle, because aerosols containing pathogens and high concentrations of endotoxin are a health hazard for humans and cattle.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 11:24:19