Study compares inhaled disinfectant risks in SPF pigs

A new comparative study in specific pathogen-free pigs housed in barrier environments found that two commonly used aerosol disinfectants, peracetic acid and chlorine dioxide, delivered strong antimicrobial effects but were linked to different subchronic inhalation-related biological changes. According to the study abstract, neither disinfectant appeared to compromise clinical health or growth performance, but both were associated with respiratory tissue changes and shifts in microbiota, suggesting that “effective” disinfection and “biologically neutral” exposure aren’t the same thing. Broader toxicology literature supports that distinction: chlorine dioxide is a recognized respiratory irritant, and peracetic acid exposure has also been associated with eye, skin, and upper respiratory irritation in occupational settings. (wwwn.cdc.gov)

Why it matters: For veterinary professionals managing SPF or other high-biosecurity systems, the study adds nuance to disinfectant selection. In barrier facilities, aerosolized disinfectants can help maintain microbial control, but this paper suggests product choice may shape airway health and microbiome effects even when pigs keep growing normally. That matters for herd health interpretation, welfare monitoring, and staff safety discussions, especially because both peracetic acid and chlorine dioxide are valued for broad antimicrobial activity and are already used in animal and healthcare disinfection settings. (cdc.gov)

What to watch: Watch for the full paper, dose and exposure details, and any follow-up work that clarifies whether the observed tissue and microbiota changes translate into meaningful long-term respiratory or production effects.