ABSTRACT
Objective@#To investigate the outbreak of mumps in a remote village school of Zhaoqing City, to evaluate and vaccine effectiveness ( VE ) of mumps containing vaccine (MuCV), so as to provide reference for the formulation of epidemic prevention and control strategies.@*Methods@#Through on site case investigations and interviews, case data and epidemic related epidemiological information were obtained. Descriptive and retrospective cohort studies were used to analyze the epidemic characteristics, explore risk factors, and evaluate the protective effect of vaccines.@*Results@#Totally 166 cases of mumps were found, and all of them were students. The total attack rate was 7.79% and the outbreak lasted for 60 days. The first case occurred on October 11th and the last case occurred on December 9th in 2018. Most of the cases aged from 10 to 13 years old, accounting for 66.27%. There were 96 male patients and 70 female patients, with no statistically significant sex difference in the incidence rate ( χ 2=2.40, P >0.05). Involving 28 classes, 11 of which had an incidence rate more than 10%, mainly distributed in grades 2, 4 and 6. There were statistically significant differences in incidence rates among different grades ( χ 2=96.89, P <0.01) and different floors ( χ 2=67.35, P < 0.01 ), with the third floor higher than the other floors. Twelve out of 58 boarding pupils were cases, and boarding pupils were 1.89 times higher in risk of contracting mumps than day students ( RR=1.89, 95%CI =1.10-3.23). Pupils without being given the shot of MuCV were higher in the infection rate than those having the shot ( χ 2=5.70, P <0.05), and the VE % was 35% (95% CI = 7%- 55%). The VE % of one dose was 34% (4%-54%), while the effectiveness of protection was declined with time ( χ 2 trend =6.53, P < 0.05). The effectiveness of vaccine almost diasappeared six years after the shot ( χ 2=1.12, P >0.05).@*Conclusion@#Delayed case report and isolation, low rate of receiving MuCV, and decreasing effectiveness of one shot MuCV are closely assocaited with the outbreak and ongoing spread of the epidemic.
ABSTRACT
Objective@#To determine the levels of vitamin D in patients with pulmonary tuberculosis in Shenzhen and identify the influencing factors of vitamin D levels and key groups of vitamin D deficiency, so as to provide a scientific basis for tuberculosis- and nutrition-related health education and promotion in Shenzhen.@*Methods@#Patients with smear-positive pulmonary tuberculosis who were diagnosed in 2016 were selected as the research subjects. Their relevant information and blood samples were collected, and the sample pool was established according to the inclusion criteria. One hundred and twenty patients were selected based on simple random sampling, including 84 men (70.0%) and 36 women (30.0%). Blood 25-hydroxyvitamin D [25(OH)D] concentrations were measured using chemiluminescence technology. Vitamin D statuses in patients were statistically described, and vitamin D levels in patients with different characteristics were compared. Multivariate linear regression analysis was performed to identify important factors influencing vitamin D levels in patients.@*Results@#Mean serum concentration of 25(OH)D in 120 patients was (40.2±16.0) nmol/L. There were 2 cases of vitamin D sufficiency (1.7%), 28 cases of vitamin D insufficiency (23.3%), and 90 cases of vitamin D deficiency (75.0%), of which 23 cases (19.2%) were of severe deficiency. 25(OH)D concentrations in patients with different lifestyles (indoors; indistinguishable indoors or outdoors; outdoors) were significantly different (35.3 nmol/L vs. 40.6 nmol/L vs. 49.5 nmol/L, F=8.274, P<0.001). Mean concentration of 25(OH)D in patients with sun exposure time of >30 min/d was higher compared to that in those with sun exposure time <30 min/d in the last month (46.4 nmol/L vs. 36.7 nmol/L, t=3.342, P=0.001). Multivariate linear regression analysis showed that the risk factors for 25(OH)D with statistical significance were Han ethnicity or not (β=-11.576, t=-1.991, P=0.049), housekeeping (including unemployment and retirement) or not (β=-6.136, t=-1.998, P=0.048), sun exposure time<30 min/d or none (β=-9.644, t=-2.829, P=0.006), body mass index (β=-2.056, t=-3.439, P=0.001) , and indoor degree of lifestyles (β=-4.419, t=-2.155, P=0.033).@*Conclusion@#Level of vitamin D is generally insufficient in patients with pulmonary tuberculosis in Shenzhen. It is necessary to strengthen health education related to vitamin D in patients with tuberculosis, especially in the high-risk population of vitamin D deficiency, such as in those with a lack of exposure to sunlight or high BMI.
ABSTRACT
Objective To clarify the status of tobacco exposure and identify risk factors of smoking among smear-positive pulmonary tuberculosis patients in Shenzhen,in order to provide a scientific basis for the formulation of tuberculosis-tobacco control strategy in Shenzhen.Methods From January to December 2016,a special survey was carried out in 8 districts in Shenzhen.A unified questionnaire was used to make face to face interviews for 958 smear-positive pulmonary tuberculosis patients registered in 2016.Descriptive statistics was conducted to analyze the status of tobacco exposure.Single factor analysis and multiple logistic regression were used to identify the important risk factors of smoking.Results Among smear-positive pulmonary tuberculosis patients in Shenzhen,the rates of general smoking,current smoking,regular smoking were 40.9％,34.2％ and 30％,respectively.All smoking rates were higher among male than female participants (x2=255.226,197.463 and 162.707,respectively,and the P values were all＜0.001);164cases of heavy smokers accounted for 50.0％ of current smokers.Among 392 smokers,64 had quitted smoking,and the rate of smoking cessation was 16.3％.Among 566 nonsmokers,the rate of passive smoking from cohabiting smokers was 17.8％ (101/566),and it was higher in female than male participants (23.1％ vs.12.3％,x2=11.219,P=0.001).In single factor analysis,gender,work or living environment,age,education level,marital status,and body mass index were closely related to smoking (x2=255.226,28.375,40.922,29.585,9.117,and 7.052,respectively,and the P values were all＜0.05).In multiple logistic regression,the major risk factors for smoking included in the model were gender (x2=120.797,P＜0.001),age (x2=5.728,P=0.017),education level (x2=17.159,P＜0.001),mode of case-finding (x2=3.670,P=0.055),work or living environment (x2=6.039,P=0.049),and marital status (x2=5.091,P=0.078).Conclusion The smoking status of smear-positive pulmonary tuberculosis patients was serious in Shenzhen.Tuberculosis patients were the key smokers.We should provide accurate intervention and health guidance for patients,such as,macro policy guidance,instillation of knowledge,mental health intervention,and smoke-free environment.