TY - CHAP M1 - Book, Section TI - Chapter 296. Blastomycosis A1 - Powell, Dwight A. A2 - Rudolph, Colin D. A2 - Rudolph, Abraham M. A2 - Lister, George E. A2 - First, Lewis R. A2 - Gershon, Anne A. PY - 2011 T2 - Rudolph's Pediatrics, 22e AB - North American blastomycosis is a pulmonary or disseminated fungal infection caused by Blastomyces dermatitidis.1,2 Although rare in children,3 the infection is often difficult to detect unless considered in the differential diagnosis. Blastomyces dermatitidis is a dimorphic fungus that exists as a mold in nature and is generally acquired through the inhalation of spores that transform to yeast in the lungs. Although isolation from natural sources has been very difficult, growth appears to occur in acidic soil in which there is decaying organic matter and high humidity. Cases of blastomycosis are reported from other countries (particularly those in central Africa), but the vast majority of cases have occurred in the Ohio and Mississippi river basins and the southeastern United States. The highest incidence of cases appears to occur in Wisconsin, Minnesota, Mississippi, Kentucky, Tennessee, and Arkansas. In endemic areas, the annual incidence of symptomatic infection is about 1 to 2 per 100,000 population. Pockets of hyperendemic regions exist where the annual incidence of symptomatic infection may approach 40 per 100,000 population. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/19 UR - accesspediatrics.mhmedical.com/content.aspx?aid=7028768 ER -