Moreover, we previously identified associations between alleles HLA-B*15, HLA-DQB1*03:01 and haplotype HLA-DRB1*11:01/HLA-DQB1*03:01 with increased incidence of asymptomatic and symptomatic Cryptosporidium infection [16]. This evidence concerns the gene HLA-DQB1 and cryptosporidiosis.