ABSTRACT
Objective To know the current situation of prevention and control of iodine deficiency disorders in Guangming District of Shenzhen through analyzing related monitoring indicators from 2010-2012.Methods According to the National Iodized Salt Monitoring Program,in Guangming District of Shenzhen,2 Street Offices were chosen,then 4 Neighborhood Committees were chosen in each Street Office randomly,15 household salt samples were selected randomly in each Neighborhood Committee; 5 primary schools were chosen in this district,and 20 urine samples were selected from 8-10 years old children in each school in 2011,one source water and one tap water sample were collected of all the water supply companies in this district in 2012.Salt iodine was determined by direct titration method; urinary iodine was determined by As3--Ce4+ catalytic spectrophotometry method; water iodine was determined by sulfate Ce catalytic spectrophotometry of drinking water standard test method.Results Salt iodine were 27.13 and 21.23 mg/kg in 2010 and 2012,respectively.The rates of qualified iodized salt in 2010 and 2012 were 93.33％ (112/120) and 90.00％ (108/120),respectively.The median concentration of urinary iodine of 8-10 years old children in 2011 was 208.19 μg/L.The median concentration of water iodine in 2012 was 31.60 μg/L.Conclusions The district isn't an iodine excess.The rates of qualified iodized salt in resent years are in line with national standards.There is no iodine deficiency in children and additional supplementation of iodine is not necessary.But relevant monitoring still needs to be improved.
ABSTRACT
Objective To analyze the prevalent feature and variant tendency of Scrub Typhus in Guangdong Province from 2006 to 2012, and provide a basis of strategy and measure on prevention and protection of Scrub Typhus. Methods Clinical information of all individual cases was gained from China Information System for Disease Control and Prevention. Cochran-Armitage trend χ2 test was used to describe the variance of Scrub Typhus incidence and the clinical cases of 2013 were predicted by autoregressive integrated moving average (ARIMA) model, while descriptive epidemiological analysis was adopted to describe the endemic distribution, seasonal characteristics and population distribution of Scrub Typhus. Results A total of 8 163 Scrub typhus cases were reported in Guangdong Province from 2006 to 2012. Annual mean incidence of the disease was 1.15/100 000 with the incidence showing an upward tendency (χ2 = 3 191.976, P < 0.01). There were 14 dead clinical cases reported with a fatality rate to be 1.72‰(14/8 163). Totally 3 166 people were predicted to infect Scrub Typhus in 2013 by ARIMA model. The disease was prevalent from the end of May to early October and the peak time was in late August (Z = 2 303.71, P < 0.01). The top five cities developed Scrub Typhus were Zhaoqing, Guangzhou, Yunfu, Shaoguan and Qingyuan. Male-female ratio was 1.00 ∶ 1.08 in all reported cases in which 52.78%(4 309/8 163) of them aged from 40 to 65 years old and 59.30%(4 841/8 163) of them were farmers. Conclusions The incidence of Scrub Typhus is rising in Guangdong Province, with the prevalent peak in summer and autumn, and rural populations are at high risk. The most effective preventions are strengthening health education , enhancing individual protection and protecting key populations in special districts.