title: Sacroiliitis associated with Cryptosporidium parvum in an HLA-B27-negative patient.
mesh_terms: D000328:Adult; D000818:Animals; D001168:Arthritis / Q000276:immunology / Q000469:parasitology*; D003457:Cryptosporidiosis / Q000276:immunology / Q000469:parasitology*; D016785:Cryptosporidium parvum / Q000276:immunology / Q000302:isolation & purification*; D015796:HLA-B27 Antigen / Q000032:analysis; D006801:Humans; D008297:Male; D012446:Sacroiliac Joint / Q000276:immunology / Q000469:parasitology*; D012698:Serologic Tests