Hypersensitivity Reactions

Thermopoilic actinomycetes, Cryptostroma, Graphium, Penicillium, Aspergillus, Mucor, and Pullularia are all fungal genera that produce spores capable of causing agricultural occupational hypersensitivity pneumonitis as well as the less severe allergic reactions. The most common cause of myco-toxin hypersensitivity pneumonitis is probably T. actinomycetes, which grows readily in decaying vegetation, such as hay or silage (especially when vegetation appears moldy). Hypersensitivity pneumonitis is described in detail in Chapter 19 (17-20).

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