OBJECTIVE To probe into the impact factors of the nosocomial respiratory tract infections after the operations with tracheal intubation under general anesthesia in order to establish the prevention and treatment strategies and provide the scientific basis.METHODS By descriptive epidemiological method and case-control study method,80 cases with nosocomial respiratory tract infections in nearly 3 years who had tracheal intubation under general anesthesia were selected,and another 180 patients with non-nosocomial respiratory tract infections with tracheal intubation under general anesthesia were selected as the control.RESULTS The incidence of the nosocomial infections from 5923 patients of the operation with tracheal intubation under general anesthesia from 2005 to 2007 accounted for 10.1%.The incidence of the respiratory tract infections of operations under general anesthesia accounted for 5.25%.The nosocomial respiratory tract infection from the tracheal intubation under general anesthesia toped the list and accounted for 52.0%.It showed seven impact factors on the nosocomial respiratory tract infection after the operation with tracheal intubation under general anesthesia by the multi-factorial Logistic regression,respectively,with significant differences(P1).CONCLUSIONS There are many impact factors that the nosocomial respiratory tract infection(especially lower respiratory tract infection) resulting from the operation with tracheal intubation under general anesthesia.The study shows the main risk factors: age,the complications of the disease,surgical condition,the ventilation time of tracheal intubationunder the anesthesia,post-operative recovery time,smoking status,the time that the operated patients start coughing after the operation.Therefore,the prevention is especially important.

A cross-sectional survey of 3589 adolescents was conducted in three cities from different typical geographical zones of Guangdong province. The median urinary iodine concentrations (MUI) of adolescents in Nanxiong, Guangzhou and Maoming were 286.6,204.1 and 166.0μ/L, respectively. The MUI of all these adolescents Was 231.7μg/L, which was slightly higher than the current World Health Organization recommendation.

Objective: To analyze the prevalence and influencing factors of suicidal behaviors among middle school students in minority areas of Guizhou Province, and to provide the reference for targetedly preventing suicidal behavior among middle school students. Methods: Questionnaire survey including adolescent health information, Depression Self-rating Scale for Children(DSR-SC), Childhood Trauma Questionnaire-Short Form (CTQ-SF) and the Pittsburgh Sleep Quality Index survey were conducted among 6 139 middle school students in minority areas of Guizhou Province, Logistic regression was used to analyze the influencing factors of suicidal behavior of middle school students. Results: A total of 1 241(20.2%) had suicidal ideation in the past 12 months, and 250 (4.1%) of middle school students had committed suicide in the past 12 months. Suicidal ideation among middle school students was positively associated with: female, non-residence, being only child, smoking, having poor relationship with teachers, poor relationship with classmates, school violence victimization, physical abused, sexual abuse, emotionally neglected, having depression, having sleeping disorders(OR=1.67, 1.64, 0.84, 0.72, 0.67, 0.58, 2.06, 2.45, 2.12, 1.68, 2.82, 1.62). While being women(OR=1.52), non-residence(OR=2.25), smoking(OR=0.52), poor relationship with teachers(OR=0.49), poor relationship with classmates(OR=0.47), school violence victimization (OR=1.79) and physically abused(OR=2.17), sexual abused(OR=1.97), physically neglected(OR=1.94), depressive symptoms(OR=3.14), sleep disorders (OR=1.66) were associated positively with the risk of suicide attempt. Conclusion Suicide-related behaviors are more common in minority areas of Guizhou Province. Teachers and parents should attach great importance to it, and their suicidal risk should be early recognized to reduce suicide-related behaviors.

Objective To understand the prevalence rate of genital Chlamydia trachomatis among a population with suspected-Neisseria gonorrhoeae infection,the distribution of Chlamydia trachomatis genotypes,assess changes in omp1 sequences among patients with Neisseria gonorrhoeae and Chlamydia trachomatis coinfections.Methods Four hundred and one swabs were collected.Chlamydia trachomatis and Neisseria gonorrhoeae were detected by Roche Amplicor System.DNA were extracted from those samples and were amplified by nested PCR.PCR products were sequencing and analyzed by software Mega4.0.Results The prevalence of genital Chlamydia trachomatis infection,Neisseria gonorrhoeae infection and coinfection with genital gonorrhoea and genital chlamydia were 82.3%,24.2% and 21.7% each.Eight genotypes were identified in 73 sequences,including E(27.4%),G/Ga(23.3%),D/Da(16.4%),F(13.7%),J (11.0%),H(5.5%),B and K(each 1.4%).Sequencing analysis showed that 3 cases(4.1%) had missense mutation,including genotype D/Da,E,G/Ga.Genotypes F,H,J and K were more variable,however,most of them were silent mutation.Conclusion The prevalence rate of genital Chlamydia trachomatis among a population with Neisseria gonorrhoeae infection was high.The most common genotypes were genotype E,G/Ga,D/Da and F; Sequencing analysis has provided a tool for the molecular epidemiology of genital Chlamydia trachomatis infections.