Gene Expression Regulation; HTLV-I Infections/complications; Interferon-gamma/biosynthesis; Intestinal Diseases, Parasitic/complications; Strongyloides stercoralis; Strongyloidiasis/complications; Transforming Growth Factor beta/biosynthesis; Aged; Albendazole/therapeutic use; Animals; Anthelmintics/therapeutic use; Antibodies, Helminth/blood; Antibodies, Helminth/immunology; Feces/parasitology; Female; HTLV-I Infections/drug therapy; HTLV-I Infections/immunology; HTLV-I Infections/metabolism; Humans; Immunocompromised Host; Immunoglobulin E/blood; Immunoglobulin E/immunology; Immunoglobulin G/blood; Immunoglobulin G/immunology; Interferon-gamma/genetics; Intestinal Diseases, Parasitic/drug therapy; Intestinal Diseases, Parasitic/immunology; Intestinal Diseases, Parasitic/metabolism; Intestinal Diseases, Parasitic/parasitology; Male; Middle Aged; RNA, Messenger/biosynthesis; Reverse Transcriptase Polymerase Chain Reaction; Strongyloides stercoralis/immunology; Strongyloides stercoralis/isolation & purification; Strongyloidiasis/drug therapy; Strongyloidiasis/immunology; Strongyloidiasis/metabolism; Transforming Growth Factor beta/genetics; Treatment Failure