Effects of filtration,vacuum cleaning and washing in pighouses on aerosol levels and pig performance |
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| Institution: | 1. School of Business, Campus Box 4039, 1 Kellogg Circle, Emporia, KS 66801, USA;2. Department of Information Systems and Cyber Security College of Business, University of Texas at San Antonio, USA;1. Department of Biosystems Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium;2. Unit Technology and Food, Flemish Research Institute for Agriculture and Fisheries, Burgemeester Van Gansberghelaan 115, Bus 1, 9820 Merelbeke, Belgium;1. Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Grønnegårdsvej 2, DK-1870 Frederiksberg C, Denmark;2. Department of Animal Science, Faculty of Science and Technology, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark;1. Department of Civil and Environmental Engineering & Construction, University of Nevada Las Vegas, Las Vegas, United States;2. Department of Mathematical Sciences, University of Nevada Las Vegas, Las Vegas, United States;3. Department of Chemistry, University of Nevada Las Vegas, Las Vegas, United States;1. Agroscope, Animal Production Systems and Animal Health, Taenikon, 8356 Ettenhausen, Switzerland;2. Animal Nutrition, Department of Environmental System Sciences, ETH Zürich, 8092 Zürich, Switzerland;3. Agroscope, Research Division Competitiveness and System Evaluation, Taenikon, 8356 Ettenhausen, Switzerland |
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| Abstract: | Three techniques to reduce the exposure of humans and pigs to aerosols in pig houses have been investigated; filtration and recirculation of air in weaner rooms (FR), weekly vacuum cleaning in a finishing house (VC) and weekly washing with water of weaned piglets (WA). All experiments have been carried out in rooms for 70 (FR), 96 (VC) or 72 (WA) animals. For FR seven replications, for VC two replications and for WA six replications have been carried out.Average reduction in gravimetrical dried aerosol concentrations was 40% (1.58 vs. 2.65 mg/m3) for FR (P<0.0001), but did not result in significant changes in daily feed intake nor daily gain of piglets during the weaning stage. Incidence of respiratory health disorders was very low in both groups.Average reduction in aerosol concentrations was 6% (2.34 vs. 2.50 mg/m3) for VC (P>0.05). Reductions improved from −2% on the day following vacuum cleaning to over 10% from 4 days after vacuum cleaning onwards. No significant differences in feed intake or daily gain of pigs were observed. Pigs in rooms without vacuum cleaning received more veterinary treatments for respiratory health disorders, resulting in less pigs with lung lesions.Average reduction in aerosol concentrations was 10% (4.17 vs. 4.66 mg/m3) for WA (P<0.05) compared to the reference level. For weekly washing of piglets the reduction in aerosol concentration was highest (25%) on the day of washing. No significant improvements in production of pigs have been found.Costs of reducing aerosol concentrations in pighouses are not compensated by improved production of pigs. |
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