Symptoms arise 4 to 12 hours after exposure to an<unk> <unk> , and generally last from one to five days. Common generalised symptoms include fever over 38 °C, chills, myalgia and malaise. The most frequent respiratory symptoms are dyspnea and a dry cough, while a wheeze may be present less commonly. Headache, rhinitis, conjunctivitis and keratitis can also be present, and skin irritation may occur in those handling grain. Respiratory function may worsen to the point where hypoxia occurs, and damage to the airways may lead to non-cardiogenic pulmonary edema one to three days post exposure. Laboratory investigations may show a raised white cell (and specifically neutrophil) count, while a chest X-ray is often normal or shows minimal interstitial infiltration.
Organic dust toxic syndrome
Mineral dust airway disease
Chemical pneumonitis
Dust pneumonia
Pigment dispersion syndrome
Allergic bronchopulmonary aspergillosis
Occupational asthma
Reactive airway disease