Chadee Dave D
Insect Vector Control Division, 3 Queen Street, St. Joseph, Trinidad, West Indies.
J Am Mosq Control Assoc. 2003 Sep;19(3):199-205.
An island-wide house survey was conducted in January 2002 to determine the geographic distribution, container profile, and population density of the Aedes aegypti in Tobago, West Indies. The results showed the Ae. aegypti infestation levels were significantly different (P > 0.01) among the 4 districts, with greater infestation levels (P > 0.01) observed in the Northern and Windward districts than in the Central and Leeward districts. From the 50 towns in Tobago, houses were found positive in Delaford (21), Argyle (18), and Goodwood (14). representing 42.1% of the total number of positive houses in the Windward district (3,971 houses); Parlatuvier (15), Whim (14), Castara (12), and Bloody Bay (12), representing 62.3% of the total number of positive houses in the Northern district (3,087 houses); Calderhall (12), Mason Hall (11), and Government House (10), representing 46.5% of the total number of positive houses in the Central district (4,706 houses); and Lambeau (10), Bucco (6), and Bethel (6), representing 53.7% of the total number of positive houses in the Leeward district (3,175 houses). The majority (66 or 63.5%) of dengue cases occurred in the Central district where the Breteau indices ranged from 7.1 to 44.0 (mean = 16.6). These results suggest that a more systematic and sustained vector control program that uses both biological and chemical control methods should be adopted to reduce Ae. aegypti populations to below dengue transmission thresholds.
2002年1月在整个岛屿范围内进行了房屋调查，以确定西印度群岛多巴哥岛埃及伊蚊的地理分布、容器情况和种群密度。结果显示，4个区的埃及伊蚊感染水平存在显著差异（P>0.01），北部和向风区的感染水平高于中部和背风区（P>0.01）。在多巴哥岛的50个城镇中，德拉福德（21处）、阿盖尔（18处）和古德伍德（14处）的房屋检测呈阳性，占向风区阳性房屋总数（3971所房屋）的42.1%；帕拉图维尔（15处）、惠姆（14处）、卡斯塔拉（12处）和血腥湾（12处），占北区阳性房屋总数（3087所房屋）的62.3%；卡尔德霍尔（12处）、梅森霍尔（11处）和总督府（10处），占中区阳性房屋总数（4706所房屋）的46.5%；以及兰博（10处）、布科（6处）和伯特利（6处），占背风区阳性房屋总数（3175所房屋）的53.7%。大多数（66例或63.5%）登革热病例发生在布雷托指数范围为7.1至44.0（平均=16.6）的中区。这些结果表明，应采用更系统、持续的病媒控制计划，同时使用生物和化学控制方法，将埃及伊蚊数量减少到登革热传播阈值以下。
