Study on thedistribution of high titer neutralizing antibody against human cytomegalovirus in plasma donors

Abstract

Objective To investigate the distribution of plasma donors with high titer neutralizing antibodies against human cytomegalovirus (HCMV) in the general plasma donor population. Methods 920 plasma samples of Taibang were tested in April 2014 to investigate the distribution of anti-HCMV neutralizing antibodies. After further testing of mixed plasma, the threshold for screening plasma was determined. From October 2019 to May 2020, neutralizing anti-HCMV in 40 078 plasma samples from 11 plasma stations in Shandong province were screened by the microcytopathic method (modified high-flux neutralization test method). The proportion of neutralizing anti-HCMV enriched in high titer and the distribution in the donor population were analyzed by SPSS 26 and Minitab19 analysis software. Results Among 920 samples, 73.26%, 0.43%, and 8.69% of them had neutralization titer<1∶15, ≥1∶60 and ≥1∶30, respectively. The neutralization titer of mixed plasma was detected, and 1∶30 was determined as the high titer. The yielding rate of high titer neutralizing anti-HCMV in Shandong was 9.06% (3 633/40 078). The proportion of plasma donors with high-titer neutralizing anti-HCMV in the donation population from plasma stations was 4.95%~13.03% (9.06±2.07) %. The proportion of plasma donors with high-titer neutralizing anti-HCMV by gender was 15.67% (2 185/13 951) in women and 5.54% (1 448/26 127) in men(P<0.05). Conclusion There was a certain proportion of plasma donors wiht high titer neutralizing anti-HCMV in the population of plasma donors in Shandong, and they can constantly serve neutralizing anti-HCMV to ensure the production of anti-HCMV immunoglobulin preparations.

Keywords

• human cytomegalovirus
• neutralizing antibody
• anti-hcmv screening
• anti-hcmv
• plasma donors
• raw plasma