Tong-de area of Qinghai Province had been identified by seroepidemiology as the high infection area of hepatitis B virus where the Zang population inhabit.To formulate a preventive strategy against hepatitis,we invest...Tong-de area of Qinghai Province had been identified by seroepidemiology as the high infection area of hepatitis B virus where the Zang population inhabit.To formulate a preventive strategy against hepatitis,we investigated in this area the biological characteristics and the genotypes of hepatitis B virus(HBV).PCR was used to amplify HBV S and C genes of samples from Zang population. The amplified products were sequenced,the nucleotide identities were analysed(MEGA 3 software) and the phylogenetic tree was constructed.The results showed that S gene of most of the HBV serum samples clustered into genotype D while C gene of the samples clustered into genotype C which demonstrated that HBV genotypes mostly were recombinants of HBV C and D genes in Zang population in Tong-de area of Qinghai Province.展开更多
为选择合适的化学消毒剂,采用载体定量杀菌试验对3种含氯消毒剂杀灭细菌芽孢的效果进行了比较。结果,三种含氯消毒剂在相同条件下,二氯异氰尿酸钠以有效氯800 mg/L溶液对载体上枯草杆菌黑色变种芽孢作用25 m in平均杀灭率达到100%;二氯...为选择合适的化学消毒剂,采用载体定量杀菌试验对3种含氯消毒剂杀灭细菌芽孢的效果进行了比较。结果,三种含氯消毒剂在相同条件下,二氯异氰尿酸钠以有效氯800 mg/L溶液对载体上枯草杆菌黑色变种芽孢作用25 m in平均杀灭率达到100%;二氯一溴异氰尿酸钠以有效氯300 mg/L溶液对枯草杆菌黑色变种芽孢作用30 m in平均杀灭率达到100%;二氧化氯以其含量为250 mg/L的溶液对枯草杆菌黑色变种芽孢作用30 m in平均杀灭率率达到100%。结论,3种含氯消毒剂对细菌芽孢均具有很好的杀灭效果,以二氧化氯杀芽孢效果最好。展开更多
文摘Tong-de area of Qinghai Province had been identified by seroepidemiology as the high infection area of hepatitis B virus where the Zang population inhabit.To formulate a preventive strategy against hepatitis,we investigated in this area the biological characteristics and the genotypes of hepatitis B virus(HBV).PCR was used to amplify HBV S and C genes of samples from Zang population. The amplified products were sequenced,the nucleotide identities were analysed(MEGA 3 software) and the phylogenetic tree was constructed.The results showed that S gene of most of the HBV serum samples clustered into genotype D while C gene of the samples clustered into genotype C which demonstrated that HBV genotypes mostly were recombinants of HBV C and D genes in Zang population in Tong-de area of Qinghai Province.
文摘为选择合适的化学消毒剂,采用载体定量杀菌试验对3种含氯消毒剂杀灭细菌芽孢的效果进行了比较。结果,三种含氯消毒剂在相同条件下,二氯异氰尿酸钠以有效氯800 mg/L溶液对载体上枯草杆菌黑色变种芽孢作用25 m in平均杀灭率达到100%;二氯一溴异氰尿酸钠以有效氯300 mg/L溶液对枯草杆菌黑色变种芽孢作用30 m in平均杀灭率达到100%;二氧化氯以其含量为250 mg/L的溶液对枯草杆菌黑色变种芽孢作用30 m in平均杀灭率率达到100%。结论,3种含氯消毒剂对细菌芽孢均具有很好的杀灭效果,以二氧化氯杀芽孢效果最好。
