| NH3 | Ammonia |
| PRISMA | Preferred Reporting Items for Systematic Reviews and Meta-Analyses |
| NH4+ | Ammonium |
| H2S | Hydrogen sulfide |
| OSHA | Occupational Safety and Health Administration |
| CO2 | Carbon dioxide |
| NIOSH | National Institute for Occupational Safety and Health |
| CBF | Ciliary beat frequency |
| PM10 | Concentrations of particulate matter |
| PRDC | Porcine respiratory disease complex |
| BRD | Bovine respiratory disease |
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