J67.4: Maltworker lung

Maltworker's lung, also referred to as hypersensitivity pneumonitis, is a specific form of lung inflammation that often occurs in individuals exposed to moldy barley in the malt production industry. The condition is caused by inhaling microscopic spores from mold that grows on barley, leading to an allergic reaction in the lungs. This can result in symptoms such as cough, fever, and difficulty breathing, typically 4-8 hours following heavy exposure. The problem primarily affects the respiratory system, particularly the tiny air sacs in the lungs (alveoli), and over time, could lead to permanent lung scar if the exposure continues. Despite its name, Maltworker's lung is not limited to malt workers but can also affect those in similar occupations where there is exposure to moldy barley.