Exposures to irritant particles and gases in swine farming may encourage early selection out of the occupation when compared to grain farming or cotton dust exposure environments. D. Early signs of impending health problems. There is sufficient evidence that acute cross-shift change in lung function is predictive of longitudinal lung function decrements. Additionally, at least two studies have shown that lowered baseline pulmonary function is associated with declines in pulmonary function over a work period. Chest tightness or wheezing associated with working in the building that occurs most of the time.
Pulmonary function declines.
E. Reversibility of damages or health problems. It is likely that some of the lung problems experienced by swine workers do cause irreversible damage. However, there are unpublished anecdotal cases observed that some acute lung illnesses are probably reversible. It should be realized that reversible health problems should still be prevented. Simple bronchitis is likely reversible without further occupational exposure.