To investigate the prevalence of infection in market-sold and field-captured snails in Fujian Province, so as to provide the scientific basis for the formulation of the angiostrongyliasis control measures.
In each month from May to October during the period from 2017 through 2021, snails were collected from two field fixed surveillance sites and collected from one agricultural product market in Fuzhou City, while and snails were collected from two agricultural product markets and four restaurants in Xiamen City. At least 50 snails and 500 g were sampled each time. infection was detected in snails using lung microscopy, and in using a tissue homogenate method.
A total of 9 531 snails were detected for infection in two cities of Fuzhou and Xiamen, and the overall prevalence of infection was 4.40%, with the highest prevalence in 2017 (6.82%, 116/1 701) and the lowest prevalence in 2019 (3.46%, 83/2 400). The prevalence of infection was significantly higher in snails sampled from Fuzhou City (11.23%, 326/2 903) than from Xiamen City (1.40%, 93/6 628) (χ = 461.48, < 0.01). larvae were detected in larval snails in two cities of Fuzhou and Xiamen each month. The prevalence of infection in snails appeared an overall tendency towards a rise with month in Fuzhou City, with the highest prevalence in October (15.24%), and there was a significant difference among month (χ = 14.56, < 0.05), while the prevalence of infection in snails was low in snails sampled from Xiamen City each month, with the highest prevalence in June (2.64%), and there was a significant difference among month (χ = 23.17, < 0.05). A total of 18 966 snails were detected for infection in two cities of Fuzhou and Xiamen, and the overall prevalence of infection was 0.01%.
infection was identified in and snails in Fujian Province from 2017 to 2021, and there is a potential risk of human infection.