title: Survey of histoplasmin skin test reactions among horses in Mexico.
mesh_terms: D000367:Age Factors; D000818:Animals; D005260:Female; D006659:Histoplasmin; D006660:Histoplasmosis / Q000453:epidemiology / Q000276:immunology / Q000662:veterinary*; D006734:Horse Diseases / Q000453:epidemiology* / Q000276:immunology; D006736:Horses; D008297:Male; D008800:Mexico; D012882:Skin Tests / Q000662:veterinary*
chemical_list: D006659:Histoplasmin