Paecilomyces

Characteristics: Type I and Type III allergy symptoms. Rarely considered a pathogen, it has been known to cause infections in immunocompromised patients. It is considered toxigenic.

Description: It is often found in soil, decaying plant material, composting processes, legumes, cottonseed, and some species of parasitic insects. It generally has an ocher or lilac coloration. It is disseminated as a dry spore by the wind. For indoor growth this fungus has been found on common items such as jute fibers, paper, PVC, timber (oak wood), optical lenses, leather, photographic paper, cigar tobacco, harvested grapes, bottled fruit, and fruit juice undergoing pasteurization. Paecilomyces are thermophilic and can grow in temperatures from 37°C up to 55°C. As an allergen, it has been known to cause both Type I allergy symptoms including hay fever and asthma as well as Type III symptoms including hypersensitivity pneumonitis and humidifier lung. Rarely considered a pathogen, it has been known to cause myopic keratitis in conjunction with corneal implants, nosocomial infections, endocarditis, and infections in immunocompromised patients. As a toxigenic agent, it produces paecilotoxins, byssochlamic acid, variotin, ferrirubin, viriditoxin, indole-3-acetic acid, fusigen and patulin.


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