Amato S B, Bezerra J C
Departamento de Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brasil.
Mem Inst Oswaldo Cruz. 1989 Jan-Mar;84(1):75-9. doi: 10.1590/s0074-02761989000100014.
A total of 4,298 snails Bradybaena similaris were collected from the rural area of Rio de Janeiro County and from the Counties of Paracambi and Itaguai, State of Rio de Janeiro. Two thousand and five of these snails had metacercariae in their pericardial cavity. The collecting was done between October 1983 and September 1986. The annual average prevalences were: 42.89% (1st year), 43.42% (2nd year) and 55.86% (3rd year). Experimental infection in chicks allowed the identification of these metacercariae as Postharmostomum gallinum. The small variation in size observed among metacercariae from the same host indicates that recruitment does not occur on a continuous basis. Statistical analysis showed no correlation between the snail size and the number of metacercariae in the pericardical cavity, and that the snail mortality observed in the laboratory was due to the parasitic infection.
总共从里约热内卢县的农村地区以及里约热内卢州的帕拉坎比县和伊塔瓜伊县采集了4298只相似双脐螺。其中2005只螺的心包腔中有尾蚴。采集工作于1983年10月至1986年9月期间进行。年平均感染率分别为：42.89%（第1年）、43.42%（第2年）和55.86%（第3年）。对雏鸡进行的实验性感染确定这些尾蚴为鸡后殖吸虫。同一宿主的尾蚴在大小上观察到的微小差异表明补充感染并非持续发生。统计分析表明，螺的大小与心包腔中尾蚴的数量之间没有相关性，并且在实验室观察到的螺死亡率是由寄生虫感染所致。
