de Lima e Costa M F, Rocha R S, de Almeida Magalhães M H, Katz N
Trans R Soc Trop Med Hyg. 1985;79(4):539-45. doi: 10.1016/0035-9203(85)90090-2.
A cross-sectional survey of schistosomiasis was done in Comercinho (Minas Gerais State, Brazil). Faecal (Kato-Katz technique) and physical examinations were performed on 90% and 79% of the population (1474 inhabitants), respectively. The rate of infection with Schistosoma mansoni was 70%, the geometric mean of eggs was 334/g of faeces and 7% of the infected individuals had splenomegaly. The rate of infection, faecal egg counts and the rate of splenomegaly were significantly higher in the environs (zones 3 and 4) of the town than in the central areas (zones 1 and 2) of Comercinho. This difference seemed to be determined by the social differences existing between the population in the central area and the environs; in the environs the heads of families were predominantly manual workers (73 and 94% respectively), only 10 and 3% of the houses had piped water supply and less than 14% were of better quality.
在巴西米纳斯吉拉斯州的科梅林霍开展了一项血吸虫病横断面调查。分别对90%（1474名居民）的人口进行了粪便检查（加藤厚涂片法），对79%的人口进行了体格检查。曼氏血吸虫感染率为70%，虫卵几何平均数为每克粪便334个，7%的感染者有脾肿大。该镇周边地区（3区和4区）的感染率、粪便虫卵计数和脾肿大率显著高于科梅林霍的中心地区（1区和2区）。这种差异似乎是由中心地区和周边地区人群之间存在的社会差异决定的；在周边地区，户主主要是体力劳动者（分别为73%和94%），只有10%和3%的房屋有自来水供应，质量较好的房屋不到14%。
