Coinfection by Strongyloides stercoralis in blood donors infected with human T-cell leukemia/lymphoma virus type 1 in Sao Paulo City, Brazil

The frequency of coinfection with Strongyloides stercoralis and human T-cel l leukemia/lymphoma virus type 1 (HTML-1) was determined in 91 blood donors examined at the blood bank of a large hospital in Sao Paulo city: Brazil. As control group 61 individuals, not infected by HTLV-1, were submitted to the same techniques for the diagnosis of S. stercoralis infection. In HTLV- 1 infected patients the frequency of S. stercoralis infection was 12.1%; on the other hand the control group showed a frequency significantly lower of S, stercoralis infection (1.6%), suggesting that HTLV-1 patients shoud be considered as a high risk group for strongyloidiasis in Sao Paulo city.