Objective: To assess the presence of vector-borne pathogens [including Zika virus (ZIKV), dengue virus (DENV), chikungunya virus (CHIKV), and Plasmodium (PLAS)] among voluntary blood donors in Wenshan Zhuang and Miao Autonomous Prefecture (referred to as Wenshan), so as to provide a basis for formulating blood safety-related strategies. Methods: Blood samples from voluntary blood donors in Wenshan from June to August 2022 to 2024 were selected. Real-time fluorescent quantitative reverse transcription polymerase chain reaction (RT-qPCR) was used to test 20 426 samples for ZIKV RNA, DENV RNA, and CHIKV RNA; and 19 765 samples were tested for PLAS DNA. Results: All 20 426 samples tested for ZIKV RNA, DENV RNA, and CHIKV RNA were negative; similarly, all 19 765 samples tested for PLAS DNA were negative. Conclusion: The risk of ZIKV, DENV, CHIKV, and PLAS infection among voluntary blood donors in Wenshan is relatively low. Routine surveillance for these pathogens as endemic diseases is not currently warranted. It is recommended to adjust the screening strategy based on the dynamic situation of local epidemiology control and prevention.

Objective To analyze the reason why ALT had high failure rate after blood donor screening. Methods Ran-domly selected 10647 blood donors as control group and 12129 blood donors as the screening group, statistics for the failure rate of ALT, HBsAg, anti-HCV, anti-HIV and anti-TP. In the screening group, visually inspect ALT unquali-fied specimens and review on dry type biochemistry analyzer. Analyzed the consistencies between the street screening results and laboratory test results. Results The ALT, anti HCV positive rate and total unqualified rate of screening group decreased more significantly than that of the control group, but the HBsAg, anti TP positive rate decreased in-conspicuously. Most of the reasons for ALT unqualified in the screening group was chyle blood abnormalities. Screening for ALT on street dry type biochemistry analyzer had some missing. Conclusion In order to improve the qualified rate of blood, chyle blood screening is necessary before blood donor screening, moreover, we should strengthen the quality control of street screening.