Paniagua F, Garcés J L, Granados C, Zúñiga A, Ramírez M, Jimenez L
Am J Trop Med Hyg. 1983 Nov;32(6):1294-7. doi: 10.4269/ajtmh.1983.32.1294.
Examination of blood from randomly selected residents in four subdivisions of Puerto Limón, Costa Rica, demonstrated Wuchereria bancrofti infection in 1.8% of 2,879 persons. Previous studies in four other subdivisions of the city revealed infection in 2.7% of 2,338 persons. In both studies the microfilaremia rate in males was approximately twice that in females. Distribution by race was similar in the two surveys, with microfilaremia in 1% of 1,052 white and 4.1% of 1,286 black residents in the first survey and 0.8% of 2,216 white and 5.4% of 663 black residents in the second. The highest rate of infection was in the 10-to 19-year-old and over 40-year-old age groups. In 13 rural communities near Puerto Limón, infection was found in only three (0.1%) of 3,448 individuals (27% of the population). Dissection revealed filarial larvae in 164 (6%) of 2,714 female Culex pipiens fatigans captured in 137 of 140 urban houses and in none of 936 from rural houses. Precipitin tests on stomach contents of 643 C. p. fatigans showed that 85% had taken human blood. The results indicate that endemic bancroftian filariasis in the Puerto Limón area is restricted to the urban population.
对哥斯达黎加利蒙港四个分区随机挑选的居民进行血液检查发现，在2879人中，有1.8%感染了班氏吴策线虫。此前对该市其他四个分区的研究显示，在2338人中，有2.7%感染。在这两项研究中，男性的微丝蚴血症发病率约为女性的两倍。两项调查中按种族分布情况相似，第一次调查中，1052名白人居民中有1%感染微丝蚴血症，1286名黑人居民中有4.1%感染；第二次调查中，2216名白人居民中有0.8%感染，663名黑人居民中有5.4%感染。感染率最高的是10至19岁以及40岁以上年龄组。在利蒙港附近的13个农村社区，在3448人中仅发现3人（0.1%）感染（占人口的27%）。解剖发现，在140所城市房屋中的137所捕获的2714只致倦库蚊雌蚊中有164只（6%）体内有线虫幼虫，而在农村房屋捕获的936只中未发现。对643只致倦库蚊胃内容物进行沉淀素试验表明，85%吸食过人血。结果表明，利蒙港地区的班氏丝虫病流行仅限于城市人口。
