Seroprevalence of human immunodeficiency virus, hepatitis B and C viruses, and Treponema pallidum infections among blood donors at Shiyan, Central China

Background: Ordinary screening of transfusion-transmissible infections (TTIs) among blood donors is essential for blood transfusion. Although there is several TTIs studies focus on human immunodeficiency virus, hepatitis B and C viruses, and Treponema pallidum infections in China, it is no data to illustrate any firm conclusion from Shiyan City, Central China. It aims to verify the seroprevalence of TTIs among blood donors at Shiyan. Methods: A retrospective analysis of blood donors' information was conducted for the presence of HIV, HBV, HCV and T. pallidum. Logistic regression analysis was used to demonstrate risk factors including age, gender and occupation associated with them. The variation tendency in seroprevalence of these TTIs over the study period was evaluated by Cochran-Armitage trend test. Results: Of 211 639 blood donors, 2 858 (1.35 %) had serological evidence of TTIs. The seroprevalence of HIV, HBV, HCV and T. pallidum were 0.08 %, 0.51 %, 0.20 % and 0.57 %, respectively. However, the co-infection prevalence of TTIs has not been detected. The HIV seropositivity significantly increased among female donors (OR = 1.63, P < 0.001) and farmers (OR = 2.02, P = 0.020). Significantly increased HBV seropositivity was only observed framers (OR = 1.87, P < 0.001) compared to workers. Analogously, significantly increased HCV seropositivity was observed among farmers (OR = 2.59, P < 0.001), students (OR = 2.43, P < 0.001), merchants (OR = 1.70, P = 0.014) and others (OR = 1.78, P = 0.001). The T. pallidum seroprevalence was notably increased among female (OR = 1.54, P < 0.001), and farmers (OR = 1. 70, P < 0.001). Moreover, significantly increasing trends of HIV (Z = -6.88, P < 0.01), HBV (Z = -4.52, P < 0.01), HCV (Z = -4.16, P < 0.01) and T. pallidum (Z = -1.36, P < 0.01) seropositivity were observed over the study period. Conclusions: It originally offers a substantial prevalence of TTIs among blood donors at Shiyan, Central China. Severe blood donor selection and all-inclusive screening of blood are highly recommended. It might be helpful for developing and updating guidance for blood safety.