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Asthma - occupational exposure; Irritant-induced reactive airways disease
Symptoms usually occur shortly after exposure to the offending agent (the allergen) and often improve or disappear when the affected person leaves the workplace. The symptoms often worsen as the work week progresses and resolve on weekends or vacations. Some people may experience a delayed onset of symptoms, occurring as many as 12 hours after exposure to the allergen.
The medical history reveals a pattern of worsening symptoms associated with exposure to a specific agent or workplace environment. Making the association with the correct allergen can be very difficult.
Wheezing may be heard when listening to the chest with a stethoscope ( auscultation ).
Tests used in the diagnosis of occupational asthma may include the following:
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