Occurrence of fruiting structures allows determination of Purpureocillium lilacinum as an inciting agent of pleuritis and pneumonia in a loggerhead sea turtle (Caretta caretta) by histopathologic correlation to culture.

Purpureocillium lilacinum and Beauveria bassiana were isolated from lung sampled at necropsy of a 12 year-old female loggerhead sea turtle (Caretta caretta) that had displayed abnormal buoyancy. Histopathologic evaluation revealed pleuritis and pneumonia with non-melanized, septate hyphae and fruiting structures identical to those of P. lilacinum. This case emphasizes the importance of a histological correlate to fungal culture when environmental fungi are isolated and demonstrates the infrequent phenomenon of fruiting or conidial production in tissue.