Where are Histoplasma Capsulatum Spores Found?

H. capsulatum grows in soils throughout the world. In the United States, the fungus is endemic and the proportion of people infected by the fungus is higher in central and eastern states, especially along the valleys of the Ohio, Mississippi, St. Lawrence rivers, and the Rio Grande. The fungus seems to grow best in soils having a high nitrogen content, especially those enriched with bat droppings or bird manure. Disturbances of contaminated material cause H. capsulatum spores to become airborne or aerosolized. Once ariborne, spores can easily be carried by wind and inhaled by individuals, which may result in that individual contracting histoplasmosis.

Who can contract Histoplasmosis?

Anyone working at a job or present near activities where material contaminated with Histoplasma capsulatum becomes airborne may develop histoplasmosis if enough spores are inhaled. After an exposure, how ill a person becomes varies greatly and most likley depends on the number of spores inhaled and a person's age and susceptiblity to the disease.

How can someone know if soil or droppings are contaminated with H. Capsulatum spores?

To learn whether soil or droppings are contaminated with H. capsulatum spores, samples must be collected and cultured. Presently, the method used to isolate this fungus is an animal bioassy technique which was developed by the Centers for Disease Control. This testing should be performed prior to any disturbance of an area, such as demolition of buildings, excavation of birdroost areas, etc. in order to prevent workers from developing histoplasmosis, if the fungus is present.

How do I find out about having samples tested for this fungus?

You may contact our laboratory for more information about collection and processing of samples. Samples may be collected by the EnviroHisto Laboratory personnel or you may wish to contract with another agency, such as your local Health Services, to collect and mail samples to our laboratory. Please call the laboratory prior to shipping for price quote. Reults will be mailed within six to eight weeks from the date of receipt.

Where do I get more information about Histoplasmosis?

You may also contact the National Institute for Occupational Safety and Health (NIOSH) or the National Center for Infectious Diseases (NCID), both of the Centers for Disease Control and Prevention, for any questions about histoplasmosis or decontamination of an infected site.