Endotoxin, ammonia, and total and respirable dust in swine confinement buildings: the effect of recirculated air and respiratory protective masks

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dc.contributor.author Pickrell, J.A.
dc.contributor.author Heber, A.J.
dc.contributor.author Murphy, James P.
dc.contributor.author May, M.M.
dc.contributor.author Nolan, D.
dc.contributor.author Oehme, F.W.
dc.contributor.author Schoneweis, D.
dc.contributor.author Gillespie, J.R.
dc.contributor.author Henry, S.C.
dc.date.accessioned 2010-02-11T22:40:11Z
dc.date.available 2010-02-11T22:40:11Z
dc.date.issued 2010-02-11T22:40:11Z
dc.identifier.uri http://hdl.handle.net/2097/2579
dc.description.abstract Caretakers and pigs in dusty environments with particles and toxic gases may sustain health consequences. We studied concentrations of ammonia, endotoxin, and total and respirable dust particles in four mechanically ventilated swine nurseries and two grower facilities using an ammonia sampler, filter, and British cyclone. In two of the nursery facilities, we determined the protection offered by respiratory masks that were mounted on glass funnels with filters or British cyclones and sampled for dust. In response to the increasing summer ventilation, large, nonrespirable particle concentrations in swine building atmospheres were reduced more completely by ventilation air movement than smaller respirable particles or ammonia. Total airborne endotoxin concentrations were similar to those eliciting pulmonary reactions. Total airborne endotoxin correlated with total suspended particles rather than respirable particles. Smaller respirable fecal particles enriched in endotoxin apparently stick to larger nonrespirable particles or are agglomerated before they became airborne. Internal recirculated air partially limited the mass concentration of respirable particles in the breathing zone of swine caretakers at lower but not higher ventilation rates. Respiratory protection limited the potential total dust exposures of swine caretakers in such atmospheres (<25 %, 2-tie masks; <50%, I-tie masks of the total suspended particles). Respirable particles were reduced to <55% by 2-tie masks. Properly worn 2-tie masks protect against both large and small respirable particles in swine confinement facilities. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 1992 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 93-142-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 667 en_US
dc.subject Swine en_US
dc.subject Dust en_US
dc.subject Respirable dust en_US
dc.subject Endotoxin en_US
dc.subject Recirculated Air en_US
dc.subject Respiratory protective masks en_US
dc.title Endotoxin, ammonia, and total and respirable dust in swine confinement buildings: the effect of recirculated air and respiratory protective masks en_US
dc.type Conference paper en_US
dc.date.published 1992 en_US
dc.citation.epage 171 en_US
dc.citation.spage 167 en_US
dc.description.conference Swine Day, Manhattan, KS, November 19, 1992 en_US
dc.contributor.authoreid pickrell en_US
dc.contributor.authoreid jmurphy en_US
dc.contributor.authoreid dnolan en_US
dc.contributor.authoreid oehme en_US

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