ABSTRACT
【Objective】 To analyze the characteristics of gene mutation in S region of blood donors with occult hepatitis B virus infection (OBI) in Huzhou area. 【Methods】 A total of 60 107 blood samples in Huzhou between October 2018 and June 2020 were collected by our blood station. Among them, 52 samples were NAT, yield and their epidemiological characteristics were analyzed. Twenty-seven OBI out of the 52 NAT yield samples were included in experimental group. Other eight HBV-infected individuals with positive HBsAg, core antibody (anti-HBc) and HBV-DNA were selected as positive control. Liver function and 5 serological markers of HBV were compared between the two groups, and HBV genotypes and amino acid mutation in S region in the two groups were analyzed. 【Results】 The number of NAT-yield samples were different by gender, age, and educational background (P0.05). Surface antigen (HBsAg) in the experimental group was significantly lower than that in the control group, while surface antibody (anti-HBs) and e antibody (anti-HBe) were significantly higher than those in the control group (P<0.05). Twenty sequences in S region were obtained from the experimental group, including 4 in S region and 16 in preSS region; 16 cases with type C and 4 cases with type B. 【Conclusion】 The follow-up of NAT-yield blood donors in Huzhou area should be conducted. Compared with HBV infected individuals with positive HBsAg, anti-HBc and HBV-DNA, those with OBI have a higher gene mutation rate in S region.
ABSTRACT
Objective To explore the prevalence and characteristics of occult hepatitis B virus infection （OBI） among blood donors in Huzhou region. Methods A total of 31 348 blood donors collected from October 2018 to February 2020 were selected for detecting HBV infection markers by serological and nucleic acid detection techniques. According to the detection results， 27 cases of HBsAg double negative （two kinds of reagent detection）， nucleic acid amplification technology （NAT） positive samples were identified as the occult HBV infection group （OBI group）； 25 cases of HBsAg double positive （two kinds of reagent detection）， NAT positive samples were identified as dominant HBV infection group， respectively. HBV nucleic acid quantitative detection， serum hepatitis B three line markers， liver function markers detection， and the results of the two groups were compared and analyzed. Results There were 31 034 HBsAg negative blood donors， 27 of whom were HBV-DNA positive， and the prevalence of OBI was 0.87 ‰. Six kinds of serology were found in 27 OBI patients， among which 25 cases （92.6%） were HBcAb， 17 cases （63.0%） were HBsAb， 17 cases （63.0%） were HBeAb， 15 cases （55.6%） were HBcAb and HBsAb， and 14 cases （51.9%） were HBcAb and HBeAb. There was no significant difference in gender， HBcAb positive rate， TBI， AST and ALT between the two groups （ P >0.05）. There were significant differences in age and HBsAb level （ χ 2=1.201， P <0.001； t =28.336， P <0.001）， and the average viral load was （25.86±19.68） IU/mL， which was significantly lower than the average viral load of the control group （3 254.65±535.98）IU/mL（ t =32.412， P <0.01）. Conclusion There is a certain prevalence of OBI in blood donors in Huzhou area. The main kinds of serology are HBcAb and HBsAb. Serological detection combined with nucleic acid detection can ensure the safety of blood transfusion and reduce the risk of blood borne diseases.
ABSTRACT
Objective To explore the prevalence and characteristics of occult hepatitis B virus infection （OBI） among blood donors in Huzhou region. Methods A total of 31 348 blood donors collected from October 2018 to February 2020 were selected for detecting HBV infection markers by serological and nucleic acid detection techniques. According to the detection results， 27 cases of HBsAg double negative （two kinds of reagent detection）， nucleic acid amplification technology （NAT） positive samples were identified as the occult HBV infection group （OBI group）； 25 cases of HBsAg double positive （two kinds of reagent detection）， NAT positive samples were identified as dominant HBV infection group， respectively. HBV nucleic acid quantitative detection， serum hepatitis B three line markers， liver function markers detection， and the results of the two groups were compared and analyzed. Results There were 31 034 HBsAg negative blood donors， 27 of whom were HBV-DNA positive， and the prevalence of OBI was 0.87 ‰. Six kinds of serology were found in 27 OBI patients， among which 25 cases （92.6%） were HBcAb， 17 cases （63.0%） were HBsAb， 17 cases （63.0%） were HBeAb， 15 cases （55.6%） were HBcAb and HBsAb， and 14 cases （51.9%） were HBcAb and HBeAb. There was no significant difference in gender， HBcAb positive rate， TBI， AST and ALT between the two groups （ P >0.05）. There were significant differences in age and HBsAb level （ χ 2=1.201， P <0.001； t =28.336， P <0.001）， and the average viral load was （25.86±19.68） IU/mL， which was significantly lower than the average viral load of the control group （3 254.65±535.98）IU/mL（ t =32.412， P <0.01）. Conclusion There is a certain prevalence of OBI in blood donors in Huzhou area. The main kinds of serology are HBcAb and HBsAb. Serological detection combined with nucleic acid detection can ensure the safety of blood transfusion and reduce the risk of blood borne diseases.
ABSTRACT
【Objective】 To investigate the prevalence of occult hepatitis B virus infection (OBI) among blood donors in Huzhou, and to analyze the viral load and molecular characteristics of OBI. 【Methods】 45 368 blood samples were screened by enzyme linked immunosorbent assay (ELISA) and nucleic acid testing (NAT) for HBV infection from October 2018 to February 2020 in our center. HBsAg-/NAT+ blood donors were studied as experimental group, contemporary HBsAg+ /NAT+ donors as the control. The serum viral nucleic acids of the two groups were extracted, and HBV DNA copies were detected by real-time PCR, the differences between the two groups were compared. The S region gene of the virus was amplified and sequenced by Nested PCR, then compared with the reference sequence of HBV wild type, in order to confirm the genotyping and molecular mutation characteristics of S region. 【Results】 36 samples were confirmed as OBI (0.08%, 36 / 45 368). The HBV DNA load of 8 samples was lower than the detection limit, and the average HBV DNA load of other 28 samples was (42.3±1.24) IU / mL, which was significantly lower than that of the controls (3.32±1.94) ×104 IU / mL(P<0.05). Among the 28 OBI samples, 20 were type B (71.43%), and 8 were type C (28.57%). The frequency of amino acid variation in HBsAg epitopes was significantly higher in OBI than in MHR(P<0.05). 【Conclusion】 The viral load of OBI blood donors in Huzhou, mainly genotype B, is low, and the variation sites were mainly focused in HBsAg epitope and amino acid region (124~147).
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Objective To determine whether the supplementation of ω-3 polyunsaturated fatty acids in parenteral nutrition (PN) confers treatment benefits to outcomes of septic patients.Methods The databases of MEDLINE,EMBASE,Cochrane central register of controlled trials,the CNKI and the Wanfang biomedicine were searched to identify prospective randomized controlled trials (RCTs) which compared the ω-3 polyunsaturated fatty acids supplemented with the standard PN on outcomes of adult patients with sepsis from January 1996 to June 2013.The methodological quality of the included studies was evaluated,and the Cochrane Collaboration RevMan 5.0 was used for data analysis.Results A total of 12 studies enrolling 721 patients were included.Significant reduction in 28-day mortality [relative risk (RR) 0.77,95％ confidence interval (95％CI) 0.59 to 0.99,P=0.04],short intensive care unit [ICU,weighted mean difference (WMD)=-3.10,95％CI-5.98 to-0.21,P=0.04] and hospital length of stay (WMD =-3.12,95％CI-4.65 to-1.60,P＜0.000 1) were observed in patients receiving ω-3 polyunsaturated fatty acids supplemented PN.There was no differences in days of mechanical ventilation between patients with or without adding ω-3 polyunsaturated fatty acids in PN (WMD =1.33,95％ CI-5.09 to 7.75,P=0.69).Conclusions Meta-analysis results demonstrated that PN supplemented with ω-3 polyunsaturated fatty acids was beneficial in improving the outcomes of patients with sepsis.However,this conclusion must be interpreted with caution due to the low quality of the enrolled trials.