The prevalence of present or past HIV-HBV co-infection was 27.8% (27/97) (IC95%: 19.8–37.7), with 4 samples showing positive results for HBsAg, 19 samples showing serological reactivity for anti-HBc alone, and 4 samples having reactivity against both HBsAg and anti-HBc. The gene discussed is KRT88P; the disease is coinfection.