MBL2 and deltaretrovirus infections: Regarding HTLV-1/2, the frequencies of alleles MBL*A, MBL*B, and MBL*D were similar between seropositive individuals and healthy controls, but genotype differences were statistically significant; where the genotype BB, related to low MBL production, was 9-fold higher among HTLV-infected individuals as compared to controls, suggesting a possible association with susceptibility to HTLV infection.