Evaluation of systems for reducing the transmission of porcine reproductive and respiratory syndrome virus by aerosol.

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Bulletin No. 27 - Summer 2007

Virology

Porcine Reproductive and Respiratory Syndrome (PRRS)

DEE SA, BATISTA L, DEEN J, PIJOAN C
Evaluation of systems for reducing the transmission of porcine reproductive and respiratory syndrome virus by aerosol.
Canadian Journal of Veterinary Research, 2006, Volume 70, N°1, 28-33

Three methods aiming at reducing the aerosol transmission of porcine reproductive and respiratory syndrome virus (PRRSV) were compared, i.e.:

high-efficiency particulate air (HEPA) filtration consisting of a pre-filter screen, a bag filter and a HEPA filter,
low-cost filtration consisting of mosquito netting associated to a fiberglass filter and an electrostatic furnace,
ultraviolet (UV) light irradiation.

In each case, two groups of pigs (10 PRRSV-aerosol exposed pigs and 10 recipient pigs) were housed in two separate rooms connected by a 1.3m-long duct. The same experiment was conducted without any system in between the two rooms so as to dispose of a control group. At the end of the experiment, 9/10 control pigs resulted infected by PRRSV. The HEPA-filtration proved to be by far the most effective system for reducing the transmission of PRRSV since no recipient pig resulted infected by the virus. Low-cost filtration, though less effective than HEPA-filtration, allowed to reduce significantly the transmission of PRRSV since PRRSV infection occurred in only 4 of 10 recipient pigs while UV irradiation had no effect on the transmission of the virus.

Swine Bibliography Centre

Bulletin No. 27 - Summer 2007

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