Association of environmental air contaminants with disease and productivity in swine.

摘要: A cross-sectional epidemiologic study associating air quality with swine health was conducted on 28 farms in southern Sweden. Correlation of housing environment to diseases and productivity (data collected over the preceding 12 months) were investigated. The most prevalent problems detected at slaughter pneumonia pleuritis. In farrowing nursery operations, problem neonatal pig mortality. Several contaminants (dust, ammonia carbon dioxide, microbes) found be correlated these problems. Maximal safe concentrations estimated basis dose-response correlation or human Recommended maximal contaminant were: dust, 2.4 mg/m3; ammonia, 7 ppm; endotoxin, 0.08 total microbes, 10(5) colony-forming units/m3; 1,540 ppm. overall ventilation system lower concentration microorganisms, but not dust concentrations. High animal density related high microbe Animal measured as kilograms per cubic meter (compared weight square meter) had highest contaminants.