RT Book, Section A1 Kleiman, Martin B. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7029000 T1 Chapter 300. Histoplasmosis T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7029000 RD 2023/06/04 AB Histoplasmosis, the most common endemic fungal infection in the United States, is caused by a thermal dimorphic fungus, Histoplasma capsulatum.1,2 The spore-bearing mold form grows in the environment at temperatures less than 35°C and is commonly found in the Mississippi River and Ohio River basins of the United States (eFig. 300.1). The extent and degree of environmental contamination with the mold is augmented by bird and bat droppings; the latter may contain fungal spores as well as provide factors that stimulate mold growth.