ABSTRACT
Objective The aim of this study was to analyze the HCV seroprevalence in the general population visiting the Second Affiliated Hospital of Kunming Medical University. Methods Between January 2013 and December 2015, a total of 160, 239 subjects were screened for the presence of anti-HCV antibodies in blood serum. Anti-HCV antibodies in serum samples were detected by enzyme-linked immunosorbent assay (ELISA) . The results of anti-HCV were analyzed in the features of year, sex and age. Results The HCV seroprevalence in the general population from 2013 to 2015 was 1.11% , 1.04% and 0.91% , respectively, which was significantly higher in men than in women (1.30% vs. 0.91%,P＜0.05) . The highest HCV seroprevalence occurred in aged 31-65 years. Conclusions The analysis of the data suggests that the features of HCV-positive including year, sex and age could be beneficial for formulating scientific strategy and intervention measures of HCV infection and liver cirrhosis, liver failure and hepatocellular carcinoma caused by HCV in Kunming.
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Objective To evaluate the application of MIRU - VNTR analysis in genotyping of the ofloxacin - resistant mycobacterium tuberculosis in Hangzhou. Methods From April 2010 to June 2012,the clinical isolates of mycobacterium tuberculosis were collected from designated TB hospitals in Hangzhou for drug sensitivity test. The ofloxacin -resistant mycobacterium tuberculosis strains were typed with RD105 deletion test and MIRU-VNTR typing method respectively,and the results from both methods were compared. Results A total of 52 ofloxacin -resistant mycobacterium tuberculosis strains were collected. Using RD105 deletion test,43 strains(82. 69%)belonged to mycobacterium tuberculosis Beijing family. Using a 12-locus MIRU-VNTR typing,52 distinct MIRU-VNTR patterns were detected in the 52 ofloxacin-resistant strains. The Hunter-Gaston discriminatory index(HGI)was 0. 999. Except MIRU40 and ETR-F,the other 10 MIRU-VNTR loci showed moderate or high discriminatory power for both Beijing genotype isolates and non -Beijing genotype isolates. Conclusion The selected 10 MIRU-VNTR loci has a higher discriminatory power and are appropriate for the ofloxacin-resistant mycobacterium tuberculosis genotyping.
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<p><b>OBJECTIVE</b>To study the infection status and pathogenic features of human metapneumovirus (hMPV) among children with acute respiratory tract infection in Hangzhou.</p><p><b>METHODS</b>A total of 372 children less than 14 years old with acute respiratory tract infections were recruited as subjects from the pediatric clinic or intensive care unit (ICU) of 3 hospitals in Hangzhou during November 2009 to January 2010, and November 2010 to January 2011. A total of 372 specimens were collected, including 351 respiratory swab, 9 nasopharyngeal aspirate material, 8 endotracheal aspirate material and 4 sputum. The total nucleic acid was then extracted from the specimens, and the nucleoprotein (N) gene of hMPV was amplified by RT-PCR, whose positive products were sequenced and analyzed. Africa green monkey kidney cells (Vero-E6) were applied to culture hMPV among the positive samples; meanwhile fluorescence quantitative RT-PCR was adopted to test other respiratory virus infection.</p><p><b>RESULTS</b>Out of 372 patients, 42 (11.2%) were positive for N gene of hMPV. The positive rate of hMPV among boys was 11.5% (26/226), and correspondingly 10.9% (16/146) among girls. The difference showed no statistical significance (χ(2) = 0.026, P > 0.05). The youngest patient was only 2 month-old and the eldest patient was 14 years old. The median of the patients' age was 24 months. Fifteen positive samples amplified by RT-PCR were sequenced, and all turned out to be subtype B1; whose similarity to GD165 found in Guangdong was 98.1% - 99.5% and similarity to BJ1897 in Beijing was 87.8% - 89.2%. The co-infection rate between hMPV and other respiratory virus was 45.2% (19/42); most of which was between hMPV and respiratory syncytial virus, whose rate at 26.1% (11/42).</p><p><b>CONCLUSION</b>hMPV was the single genotype relevant with the acute respiratory tract infection disease among children in Hangzhou district; however, the co-infection with other respiratory virus did exist.</p>