Autor(es): Kan, Chih-Chun; Lee, Pei-Fen; Wen, Tzai-Hung; Chao, Day-Yu; Wu, Min-Huei; Lin, Neal H.; Huang, Scott Yan-Jang; Shang, Chuin-Shee; Fan, I-Chun; Shu, Pei-Yun; Huang, Jyh-Hsiung; King, Chwan-Chuen; Pai, Lu

Resumo: This study analyzed the spatio-temporal patterns of 4,587 (94% of the total) confirmed dengue cases in Kaohsiung and Fengshan Cities (a two-city area) that occurred in Taiwan from 2001 to 2003. The epidemic had two simultaneous distinct diffusion patterns. One was a contiguous pattern, mostly limited to I km from an initial cluster, reflecting that there was a rapid dispersal of infected Aedes aegypti and viremic persons. The second followed a relocation pattern, involving clusters of cases that diffused over 10 weeks starting from the southern and moving to the northern parts of the two-city area. The virus from one clustering site jumped to several distant areas where it rapidly dispersed through a series of human-mosquito transmission cycles to several localities. In both patterns, transmission of disease quickly enlarged the epidemic areas. Future dengue control efforts would benefit from a timely syndromic surveillance system plus extensive public education on how to avoid further transmission.

Palavras-Chave: Aedes aegypti; Hemorrhagic fever; Vector; Transmission; Infection

Imprenta: American Journal of Tropical Medicine and Hygiene, v. 79, n. 3, p. 344-352, 2008

Descritores: Aedes aegypti - Epidemiology ; Aedes aegypti - Public health

Data de publicação: 2008

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