Objective To appraise determination of serum type Ⅳ collagen protein with latex-enhanced immunoturbidimetry.Methods The evaluation test was performed including precision, linearity determination, prozone reaction, correlation, recovery test and interference test.Results The intra-batch CV% was within 2.47%-3.48%, inter-batch CV% was within 3.46%-4.07%, and recovery rate was within 96.2%-99.3%. There was a good linearity, and the tolerance limit was 800 ng/mL.Regression equation:Y=1.011 8X-1.788 3;detection correlation of different concentrations of standard preparations:r2=0.999 9,Y=1.003 1X-1.236 2.The assay had a very good anti-interference performance to bilirubin, cruorin, and triglyceride without exception.Conclusion Determination of serum type Ⅳ collagen protein attains the demand of the clinic with latex-enhanced immunoturbidimetry in fully automatic biochemical analyzer.

Objective To get the information about the infection condition of blood in voluntary donors in Fuling District from 2001 to 2007, so as to take measures to improve blood quality and ensure blood safety.Methods Serum ALT was detected with Reitman-Frankel assay, and HBsAg, anti-HCV, anti-HIV and anti-TP were detected with ELISA.Results A total of 72 868 serum samples from blood donors were detected, in which 5 512 (7.56%) were positive. The positive rates of HBsAg, anti-HCV, anti-HIV and anti-TP were 3.09%, 0.48%, 0.07% and 1.27% respectively, and the abnormality rate of ALT was 2.73%. There was statistical difference of positive rate among various years (from 2001 to 2007).Conclusion The positive rate of blood in voluntary donors decreases year by year. HBsAg was the highest (1.16%), followed by ALT (2.73%), anti-TP (1.27%), anti-HCV and anti-HIV. It suggests that blood quality monitoring should be strengthed to assure blood safety.

Objective To investigate the status of extended-spectrum β-lactamases (ESBLs) production by Escherichia coli and Klebsiella pheumoniae, analyze the characteristics of drug resistance of Escherichia coli and Klebsiella pheumoniae in our hospital from Jan 1998 to Dec 2006, in order to provide a guidance to clinical rational use of antibiotics.Methods Disc diffusion test (K-B method) was used to study the drug resistance of E. coli and K.pheumoniae isolates, and ESBLs-producing strains were identified with screening test and confirmatory test. WHONET5.4 software was apllied to performing data analysis.Results In 947 strains of E. coli, 311 strains (32.8%) were detected to produce ESBLs;in 293 strains of K.pheumoniae, 69 ESBLs-producing strains (23.5%) were detected. The resistance rate of ESBLs-producing strains was significantly higher than that of ESBLs non-producing ones (P<0.05), and but ESBLs-producing strains displayed multi-resistant.Conclusion The positive rate of ESBLs producing strains is higher in our hospital. Drug resistance monitoring should be strenghed to rationally use antibacterials and to prevent increase, prevalence and outbreak of ESBLs producing strains.

Objective To investigate the resistance of multi-drug resistant Acinetobacter baumannii against aminoglycosides and its resistance genes.Methods The minimal inhibitory concentrations (MICs) of seven antimicrobials (gentamicin, amikacin, tobramycine, netilmicin, neomycin, streptomycin and kanamycin) against 20 strains of multi-drug resistant Acinetobacter baumannii were detected by agar dilution method. Meanwhile, two resistance genes of aminoglycoside nucleotidyltransferase were amplified by PCR and vertified by DNA sequencer.Results It was found that MIC50 and MIC90 of gentamicin, amikacin, streptomycin and kanamycin in 20 strains of Acinetobacter baumannii were all above 1 024 mg/L, and their resistant rates were 95%, 95%, 100% and 90% respectively, while the resistant rates of tobramycin, netilmicin and neomycin were 85%, 90% and 40% respectively. Two aminoglycoside-modification genes ant(2″)-Ⅰ and ant(3″)-Ⅰ were detected in 20 strains, with 55% and 80% of positive rate respectively. The double positive rate of two resistance genes was 50%.Conclusion The resistance of multi-drug resistant Acinetobacter baumannii against aminoglycosides was closely associated with ant(2″)-Ⅰ and ant(3″)-Ⅰ genes.

Objective To promote worldwide standardization of methods to determine creatinine by tracing to reference measurement for achieving universal accuracy measurement of creatinine.Methods The results of external laboratory assessment (EQA) survey in China and CAP were compared and analyzed. Results There was significant difference among different measurement methods and assay systems.Conclusion It should promote worldwide standardization of determine creatinine, which makes it trace to reference measurement liquid chromatography-isotope dilution mass spectrometry (LC-IDMS).

Objective To investigate the change of peripheral blood CD4+CD25+ regulatory T cells (Tr) in patients with idiopathic thrombocytopenic purpura (ITP), and to analyze its role in the pathogenesis of ITP.Methods Anticoagulated venous blood was collected from ITP patients (ITP group,n=35) and healthy controls (healthy control group,n=35). T lymphocytes were isolated and purified with human CD3+ T cell enrichment columm. The percentage of peripheral blood CD4+CD25+ regulatory T cells was detected by immunofluorescence staining (PE-anti-CD4 monoclone antibody and FITC-CD25 monoclone antibody) and bicolor flow cytometry by CD25/CD4 gating.Results The number and constituent ratio of CD4+CD25+T cell were significantly lower in ITP group than those of healthy control group (P<0.05).Conclusion There is peripheral blood celluar immunological function disorder in ITP patients, and decrease of CD4+CD25+ T cell population may be involved in the pathogenesis of ITP.

Objective To investigate the change of serum prealbumin (PA) and C-reactive protein (CRP) in burn patients and its clinical significance.Methods Sixty eight cases of burn patients were divided into two groups,group Ⅰ [n=38,with total burn surface area less than 15% of total body surface area (TBSA)] and groupⅡ(n=30,with total burn surface area more than 50% of TBSA). Thirty healthy people were set as healthy control group. Particle enhanced immunoturbidimetic assay was applied to detecting the serum levels of PA and CRP for all subjects on the day 1 after burns.Results The CRP level was much higher and serum level of PA was much lower in group Ⅱ than that of group Ⅰ,respectively. There existed significant negative correlation between PA and CRP level.Conclusion The level of serum PA decreases significantly along with total burn surface area expansion. PA can be used as a sensitive marker for estimation of inflammation degree after burns.

Objective To investigate the infection statue of new drug experimenters with hepatitis B,as well as liver fuction in 6 kind of infection modes of serum HBV,and to provide evidence for clinical therapy of hepatitis B.Methods 5 immunological HBV markers were measured with ELISA in serum sample of 550 patients before new drug test. Velocity method was applied to detecting serum TBiL,ALT,AST,γ-GT and GLO.Results New drug experimenters with hepatitis B mainly suffered from "small three positive" [HBsAg (+),anti-HBe (+) and anti-HBc (+)] (52.9%),followed by "big three positive" [HBsAg (+),HBeAg (+) and anti-HBc (+)] (28.2%). The rate of hepatic function abnormality was significantly higher in "small three positive" group than that of the other groups (P<0.01),while the rate of hepatic function abnormality was much higher in "big three positive" group than that of the other groups except "big three positive" group (P<0.05).Conclusion In 550 cases of new drug experimenters,HBV are all positive,mostly in "small three positive" or "big three positive" mode. The rate of hepatic function abnormality is markedly elevated in 6 kind of infected modes,in which "big three positive" mode is the highest,followed by "1,3" mode and"small three positive" mode.

Objective To investigate the status of urogenital Ureaplasma urealyticum (Uu) infection and their drug tolerance in our area,so as to guide rational administration for the clinic.Methods Mycoplasma culture and drug susceptibility test were performed for 771 patients with urogenital infaction. The culture,identification and drug resistance of mycoplasma were carried out with one complex mycoplasma kit.Results The positive rate of Uu was 49.9%. The proportional percentage of males was 12.5% and the Uu positive rate was 22.3%,for females,the proportional percentage and Uu positive rate was 87.5% and 60.6% respectively. The population aged 21-40 was susceptible to Uu infection. The most sensitive antibioties to Uu was clindamycin (95.12%),followed by doxycycline (87.57%) and roxithromycin (86.24%).Conclusion The difference of Uu drug sensitivty was significant in different areas. So it is necessary to select antibioties by drug sensitivity. Clindamycin,doxycycline and roxithromycin may are used as preferred antibioties in treating Uu infection in our area. The drug-resistance status of spectinomycin and lincomycin was serious.

Objective To explore the diagnostic value of serum myoglobin (Mb) and cardiac troponin (cTn) in patients with acute myocardial infarction (AMI) by reviewing and evaluating the corresponding references with evidence-based medicine (EBM) theory.Methods All references (including papers,reviews and abstracts) of CNKI-CHKD,CMCC(1994-2005)and EMCC(1995-2005) were collected and retrospectively analyzed according to evidence based medicine (EBM) standard,with Mb cTn as the detected indices for diagnosing AMI.Results In the searched period of 1994-2005,123 papers were published (93 pieces were written in Chinese,and 30 were written in English). In most references,the authors set clinical control trial (CCT) (Chinese: 92.5%;English: 53.3%),blind control trial (Chinese: 19.4%;English: 10.0%) and/or random control trial (RCT) (Chinese: 9.7%;English: 16.7%). The respective reference ranges weren′t provided in 42 pieces of articles.Conclusion The analytic result of the references in home and aborad indicates combined detection of Mb and cTnI posseses favourite sensitivity and specificity,which contributes to the early diagnosis of acute myocardial infarction.