Debnath Falguni, Ponnaiah Manickam, Acharya Pralay
Scientist C, Division of Epidemiology, ICMR - National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal; MPH Scholar, ICMR - National Institute of Epidemiology, Chennai, Tamil Nadu, India.
Scientist E, ICMR School of Public Health, ICMR - National Institute of Epidemiology, Chennai, Tamil Nadu, India.
Indian J Public Health. 2017 Oct-Dec;61(4):239-242. doi: 10.4103/ijph.IJPH_309_16.
In November 2015, death due to fever and increased number of fever cases were reported from Baranagar Municipality of North 24 Parganas district of West Bengal.
The episode was investigated with the objective to (1) confirm the existence of an outbreak, (2) describe it in terms of time, place, and person, (3) determine the cause of outbreak, and (4) recommend control measures.
Monthly incidence of dengue from 2012 to 2014 was calculated and compared with 2015 to confirm the outbreak. We used Integrated Disease Surveillance Programme definition and searched for suspect dengue cases going door-to-door in ward number one of Baranagar Municipality. Active case search was done in health facilities also. Information on date of onset, symptoms, sociodemographic, serological reports, and clinical outcome for suspected and confirmed dengue cases was collected. Blood specimens were collected for NS1 ELISA/monoclonal IgM antibody capture-ELISA test. Environmental and entomological surveys were done.
Six hundred and seventy-one dengue cases (Overall attack rate = 3/1000), two deaths (Case fatality = 3/1000) were reported during September 14, 2015, till December 12, 2015. Out of 34 wards, attack rate was highest in ward number 1 (0.7%) and was 3 per 1000 among females. All age groups were affected. Thirty-two percent required hospitalization. NS1 ELISA was positive for 612 cases. Out of interviewed 31 dengue cases, 94% had headache, 90% had myalgia, followed by arthralgia, rash, and retro-orbital pain. Only in ward number 1, house index was >5%.
We confirmed dengue outbreak. All age groups got affected. Deaths occurred in this outbreak. Potential breeding sources were present in ward number 1.
2015年11月，西孟加拉邦北24帕加纳斯区巴拉纳加尔市报告了因发热导致的死亡以及发热病例数量增加的情况。
对该事件进行调查，目的是（1）确认疫情的存在，（2）从时间、地点和人群方面对其进行描述，（3）确定疫情的原因，以及（4）推荐控制措施。
计算2012年至2014年登革热的月发病率，并与2015年进行比较以确认疫情。我们采用综合疾病监测计划的定义，在巴拉纳加尔市第一病房挨家挨户搜索疑似登革热病例。也在卫生设施中进行了主动病例搜索。收集了疑似和确诊登革热病例的发病日期、症状、社会人口统计学、血清学报告和临床结果等信息。采集血液标本进行NS1 ELISA/单克隆IgM抗体捕获ELISA检测。进行了环境和昆虫学调查。
2015年9月14日至2015年12月12日期间，共报告了671例登革热病例（总发病率=3/1000），2例死亡（病死率=3/1000）。在34个病房中，第一病房的发病率最高（0.7%），女性发病率为每1000人中有3例。所有年龄组均受影响。32%的患者需要住院治疗。612例病例的NS1 ELISA检测呈阳性。在接受访谈的31例登革热病例中，94%有头痛症状，90%有肌痛，其次是关节痛、皮疹和眶后疼痛。仅在第一病房，房屋指数>5%。
我们确认了登革热疫情。所有年龄组均受影响。此次疫情中有死亡病例。第一病房存在潜在的滋生源。
