The mutation patterns of HBV P gene and genotyping in patients with lanivudine-resistant chronic hepatitis B / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To analyze the mutation patters of HBV P gene and genotyping of heptitis B virus in patients with chronic hepatitis B (CHB) after the emergence of drug-resistance during lamivudine (LAM) therapy.</p><p><b>METHODS</b>LAM-resistant mutations and genotype of HBV were dectected in patients with LAM-resistant CHB in our hospital from Sep. 2008 to June. 2010.</p><p><b>RESULT</b>107 patients had 8 mutation patterns. YMDD mutations happened in 100%, only YMDD mutation were 43 patients, while others were YMDD combined with rtL180M mutations; the HBV genotype among 107chronic hepatitis was mainly B (25.2%) and C (73.8%) and only 1 patient was happend B and C mixed infection. Genetype C was mainly YMDD combined with rtL180M mutations pattern, the rate is 60.7% (48/79); while genetype B was mainly rtM204 mutation pattern, the rate is 66.7% (18/27); there were significant difference between the genetype B and C in mutation pattern (chi2 = 8.4, 7.2, respectively, P < 0. 01).</p><p><b>CONCLUSION</b>YMDD mutation is the major mutation pattern of HBV P gene after emergence of LAM-resistance. Genotypes of hepatitis B virus can determine the related mulation patterns of HBV P gene.</p>

Clinical value of CD64 expression in adults with measles complicating bacterial pneumonia / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To study the clinical value of expression of peripheral blood neutrophil CD64 in adults with measles complicating pneumonia.</p><p><b>METHODS</b>106 patients were divided into two groups by clinical manifestation and bacteria study: measles complicating bacterial pneumonia group and measles complicating viral pneumonia, using flow cytometry determination of CD64, C-reactive protein (CRP) and white blood cell (WBC) count.</p><p><b>RESULTS</b>The expression of CD64 in the bacterial pneumonia group with eruptive stage was (32.15 +/- 11.07) MFI, which was significantly higher than that in the group of with recovery stage (10.6 +/- 3.23) MFI (P < 0.01) and viral pneumonia (9.55 +/- 3.48) MFI (P < 0.01). These markers were considered positive if CD64 > or = 8.5 MFI, CRP > or = 10 mg/L and WBC > or = 9.05 x 10(9)/L. Their sensitivity was 78.12%, 80.48% and 59.37%. Their specificity was 76.19% ,67.67% and 64.28%. Their accuracy rate was 77.35%, 74.52%, 61.32%; CD64 has a positive relationship with CRP.</p><p><b>CONCLUSION</b>Compared to CRP, expression of peripheral blood neutrophil CD64 can be a better marker in the early diagnosis of patients with measles complicating bacterial pneumonia and as one of the indicators of disease conditions.</p>