Seroincidence of Coccidioidomycosis during Military Desert Training Exercises
Abstract
Coccidioidomycosis is a common fungal infection acquired in the southwestern United States. This is the first study in over 2 decades to determine the seroincidence of Coccidioides immitis infections among U.S. military members performing training exercises in an area of endemicity. Only 8% of participants were aware of coccidioidomycosis, despite the majority having visited or lived previously in an area of endemicity. One (0.6%) of the 178 participants developed "definite" serologic evidence of infection over a 5-week training period; four (2.3%) additional patients developed "possible" coccidioidomycosis infections. None had complicated disease. The calculated annual incidence ranged from 6 to 32%. This study suggests that the risk of serious coccidioidomycosis is low among military personnel during desert training exercises; however, disease incidence may vary depending on specific activities and geographic factors. Due to the potential morbidity and mortality of this infection, preventative strategies, including vaccine development, are advocated.
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