Automatic foggers fall short in disinfecting hog-farm supplies


by Pig Health Today

via The Pig Site - 14 May 2020


Preventing fomites from carrying pathogens into hog farms is a daily biosecurity priority. Decontamination rooms where aerosolized disinfectants are applied to incoming supplies are an increasingly common practice, especially on sow farms. However, it remains unclear just how effective typical disinfection protocols are and whether they may lend a false sense of security.


To gain a better understanding, Kristen Leuck, veterinary student at the University of Illinois, conducted a study to determine how well current fumigation-room practices perform in terms of decontaminating supplies.1 More specifically, she evaluated the surface-area coverage of disinfectants applied with automatic and manual foggers.


The fumigation room


Leuck conducted the study using a fumigation room (1.8 by 2.1 by 2.4 meters) within a commercial sow farm, with a three-tier, wire shelving unit located on the north side of the room. The room included a 0.6-meter ventilation fan located on the east side of the room to exhaust air following the disinfection process. (See accompanying diagram.)


Two automatic foggers and a manual pump sprayer applied an accelerated hydrogen peroxide disinfectant at a 1:16 dilution, according to the manufacturerís recommendation, as follows: