RESUMO
【Objective】 To investigate whether the current retention methods in blood stations can fully meet the traceability requirements of blood test results by analyzing the traceability of retained samples for syphilis antibody testing. 【Methods】 Thirty-four one-assay-positive deep-well plate retention samples, 68 double-assay-positive deep-well plate retention samples and 263 negative retention blood braids and corresponding deep-well plate retention samples that expired retention period for syphilis antibody testing from 2014 to 2020 in our center were collected. The TP-ELISA assays of two manufacturers were used for retesting, and the results were recorded and compared with the original results statistically. 【Results】 The concordance rate of the double-assay-positive and single-assay-positive samples with their corresponding deep-well plate samples was 98.53%(67/68) and 67.65%(23/34), respectively(P<0.05). Specific results for single-assay-positive syphilis antibody samples and their corresponding deep-well plate retention samples were as follows: 1) Single positive (reagent A): 13 out of 14 original samples were 0.65
RESUMO
【Objective】 To improve the efficiency and screening strategy by evaluating the performance of HBsAg screening before blood donation in Dalian. 【Methods】 The confirmed HBsAg positive samples were detected qualitatively and quantitatively, and retested with HBsAg rapid testing kit pre-donational used parallelly. Efficiency of HBsAg screening before donation was calculated, and compared between first-time and repeated donors. 【Results】 The pre-donation HBsAg screening was conducted for 199 553 cases, including 95 321 first-time donors (63.2%) and 55 396 repeated donors(36.8%).1 015 donors (first-time/repeated: 999/16) were reactive in HBsAg rapid testing. 113 samples (first-time/repeated: 108/5), initially negative in HBsAg rapid testing, were confirmed HBsAg positive by laboratory testing. The efficiency of pre-donation HBsAg screening for first-time donors(10.9‰) was significantly higher than that of repeated donors(0.3‰)(P130) and 92.44 (18.7->130), respectively. 【Conclusion】 The HBsAg rapid testing kit used in Dalian Blood Center could meet requirements for blood donor screening before donation, while good efficiency of HBsAg pre-donation screening could be achieved only in first-time blood donors.
RESUMO
The human cytomegalovirus (HCMV) is a widespread herpesvirus. Virus reactivation from latency can lead to stillbirth, miscarriage, fetal anomalies, and intrauterine growth retardation. During latent infection with the HCMV, the virus can be cleared by the immune response or apoptosis of host cells. However, the HCMV has developed several strategies to manipulate expression of its genes and the microenvironment of host cells. Recent studies have shown that latent infection with the HCMV is associated with viral: regulation of early expression of genes; evasion of cell death; evasion of the immune response; regulatin of non-coding RNAs. This review summarizes recent research progress on the mechanisms underpinning latent infection with the HCMV.