Objective To survey on the prevalence of schistosomiasis among floating population in Zhejiang province. Methods A survey on prevalence of schistosomiasis among floating population was conducted from September to November 2008, and the stratified cluster sampling method was adopted in the survey. Totally 129 villages of 19 counties or districts were selected as survey sites, and 100 samples of migrants aged 6 to 65 from schistosomiasis-endemic areas were taken in each selected village. All selected individuals were surveyed by questionnaire and underwent serum indirect hemagglutination (IHA) test. For individuals with positive serum IHA testing the fecal examination was carried out to detect the eggs by nylon sedimentation method. SPSS 13.0 software was used for data processing. Results The number of migrants in survey sites was 3 357 420, among whom 303 219 were from schistosomiasis-endemic areas (9.03%).The positive rate in serum IHA test was 2.06% (286/13 898), 276 IHA-positives individuals received fecal examination, and 7 cases were positive (2.52%). Based on above data it was estimated that there would be potentially about 33 500 serum IHA-positive cases and 845 egg-positive cases among floating population in Zhejiang province. Conclusion The risk of schistosomiasis transmission still exists in Zhejiang province due to the infected migrants from endemic areas, and a surveillance system and quick response are required for prevention of re-emergence of the disease.

Objective: To investigate the clinical features and prognosis factors of acquired immunodeficiency syndrome (AIDS) patients complicated with cryptococcal meningitis (CM). Methods: Retrospective analyses were performed on clinical features, laboratory data, treatment status and related prognosis factors in 81 AIDS patients with CM admitted to the Department of Infectious Diseases, Beijing You′an Hospital, Capital Medical University from January 2010 to December 2017. The t test, rank sum test and χ² test were employed to analyze the data. Results: Of the 81 AIDS patients with CM, 71 cases were infected with human immunodeficiency virus (HIV) by sexual transmission (87.7%). The most common clinical symptoms were fever in 60 (74.1%), headache in 72 (88.9%), and nausea and vomiting in 56 (69.1%). Cerebrospinal fluid (CSF) examination results show that 60 cases (74.1%) had elevated opening pressure, the white blood cell count was 17.0 (6.0, 44.5)×10⁶/L, monocyte count was 9.0 (3.0, 29.5)×10⁶/L, the level of chloride was (117.26±5.61) mmol/L, of glucose was 2.89 (2.05, 3.41) mmol/L, of protein was 0.32 (0.21, 0.65) g/L, ink staining positive rate was 84.0% (68/81), fungal culture positive rate was 59.3% (48/81). The positive rate of serum cryptococcal antigen was 96.3% (78/81), and CSF cryptococcal antigen positive rate was 93.8% (76/81). The clinical efficacies were not significant different among different treatment regimens (χ²=1.479, P=0.533). After treatment, 60 patients survived and 21 died, with an overall mortality rate of 25.9%. Univariate analysis showed that consciousness disorder and CSF opening pressure were significantly higher in the death group than those in the survival group (χ²=22.365, t=0.317, respectively, both P<0.05), while serum albumin (Alb) and CD4⁺ T lymphocyte counts were significantly lower in the death group than those in the survival group (t=7.975, Z=-3.073, respectively, both P<0.05). Multivariate logistic regression analysis showed that consciousness disorder and Alb were independent factors influencing the clinical outcome of AIDS patients with CM. Consciousness disorder was related with poor outcome (odd ratio (OR)=26.704, P=0.011, 95% confidence interval (CI) 2.115-337.247), and higher Alb was related with good outcome (OR=0.671, P=0.005, 95%CI 0.507-0.888). The area under the receiver operating characteristic curve of serum Alb for predicting poor outcomes of AIDS patients with CM was 0.932 (95% CI 0.859-0.998, P<0.01). By using 31.7 g/L as cut-off value, the sensitivity was 95% and the specificity was 81% for predicting poor outcome. Conclusions AIDS complicated with CM has a high mortality rate, and its clinical features are lack of specificity. Consciousness disorder and Alb are independent prognosis factors.

OBJECTIVE: To study the combined effect of noise and hydrogen cyanide on noise-induced hearing loss( NIHL)in a metal electroplating enterprise. METHODS: The judgment sampling method was used to select 663 workers in a largescale metal electroplating enterprise as the study subjects. Among them,186 workers exposed to noise alone were designated as noise group; 138 workers exposed to hydrogen cyanide alone were designated as hydrogen cyanide group; and161 workers exposed to noise and hydrogen cyanide were designated as combined effect group,and 178 workers without exposure from occupational disease risk factors were designated as control group. Questionnaires survey and pure tone audiometry were used for analyzing the effects of combined noise and hydrogen cyanide exposure on NIHL. RESULTS: The hearing loss detection rate of the study subjects was 40. 4%. The hearing loss detection rates in the control group,noise group,hydrogen cyanide group,and combined effect group were 17. 4%,47. 8%,32. 6% and 64. 0%,respectively. The detection rate of hearing loss in the control group was lower than that in the other three groups( P < 0. 008). The NIHL detection rates in the combined effect group and the noise group were higher than that in the hydrogen cyanide group( P <0. 008). The hearing loss detection rate of the combined effect group was higher than that of the noise group and the hydrogen cyanide group( P < 0. 008). Ordinal multi-categorical logistic regression model results showed that after adjusting confounding factors such as age,length of service,gender,marital status,smoking,alcohol drinking,we found hydrogen cyanide exposure,noise exposure,and combined exposure to hydrogen cyanide and noise had effects on workers' hearing(P < 0. 05). The risk of hearing loss in workers exposed to noise and hydrogen cyanide was higher than that of workers exposed to noise alone or hydrogen cyanide alone. CONCLUSION: There is a combined effect of noise and hydrogen cyanide in this metal electroplating enterprise,which can increase the risk of NIHL in workers.