ABSTRACT
Objective To analyze the epidemiological characteristics of dengue fever outbreak in Shaoxing City,and to provide a scientific basis for the prevention and control.Methods A retrospective epidemiological investigation was conducted to search the patients by given definition.Enzyme linked immunosorbent assay (ELISA)was used for detecting the anti -dengue virus antibodies.The serum samples from patients were collected for dengue virus isolation and the positive samples were identified by RT -PCR.Breteau Index was carried out to monitor the density of mosquito larva. Results A total of 42 cases were found with no death reported.The symptoms mainly included fever (1 00%),fatigue (59. 52%),arthralgia(50. 00%),headache (47. 62%)and rash (38. 1 0%).The outbreak lasted for 71 days with the first case occurred in July 1 5 and the last in September 23.The peak was from August 30 to September 5. Thirty seven cases were located in Keqiao District and 5 cases were in Yuecheng District.The male/female ratio was 1 . 33∶1 .The age of cases ranged from 1 0 to 79 years old with the 40 -(1 9. 05%)and 50 -(1 9. 05%)age group making the largest proportion.The outbreak also showed family aggregation.IgM antibody and nucleic acid of dengue virus were detected from serum samples of 1 2 patients.The sequence of the isolation indicated that this outbreak was caused by dengue virus typeⅡ.Conclusion The imported cases,high density of mosquito vector and missed diagnosis might contribute to this outbreak.Developing a practical scheme for mosquito elimination,improving diagnostic capacity of medical staff and their consciousness of reporting could be important ways to control dengue fever.
ABSTRACT
Objective Tolearnthecurrentsituationoffoodsafetyrisksurveillanceandtoimprovetheleveloffoodsafety riskmonitoringinShaoxingCity.Methods Wecollecteddatafromthenationalfoodcontaminantinformationsystem, foodbornediseasesurveillancereportingsystem,andthequestionnaireoffoodsafetyriskmonitoringnetwork.Results A total of 1 59 health professionals engaged in the food safety risk surveillance,and the full-time professionals was accounted for 23.90% of all the health professionals.About 90%of working equipments were equipped in the CDC of Shaoxing City, and 46% of working equipments were equipped in the county level CDC under Shaoxing′s jurisdiction.There were 483 food inspection projects in city level CDC,and 1 62 in county/district level CDC.A total of 1.595 million Yuan was allocated by the provincial special financial subsidy funds,and 1.85 million Yuan was allocated by the county special financial subsidy funds.Average 1.1 6 samples per 1 000 people of food safety risk surveillance and the positive detection rate of the foodbornediseasewas2.81%.Conclusion Theworkingfundingoffoodsafetyrisksurveillanceandprofessionalpeople were insufficient.The positive detection rate of specific pathogens foodborne disease was low and the mechanism operation was not perfect.The working mechanism should be to improved.The working funding,staffing,and monitoring ability should be strengthened.