【Abstract】 Objective To study the natural infection situation of Angiostrongylus cantonensis in murid from Maoming city of Guangdong province. Methods The rats were caught with live trap and snap trap method and identified with microscope. The adults of A.cantonensis were examined in lungs and hearts of the rats. Results A total of 196 rats were collected, and the natural infection rate of A.cantonensis was 10.71%. The natural infection rates of A.cantonensis in Rattus norvegicus and Mus musculus were about 11.93%(21/176) and 0(0/20) respectively. Conclusion There is a high infection level of A.cantonensis in R.norvegicus in Maoming city and R.norvegicus is an important final host in this area.

Objective To understand the natural infection rate of Angiostrongylus cantonensis in Achatina fulica and Ampullaria gigas from countryside of Maoming city of Guangdong province. Methods The Ac.fulica and Am.gigas collected from the district were digested with the Pepsin, and then larvae of An.cantonensis in the snails were identified and counted. Results 276 of Ac.fulica and 432 of Am.gigas were examined. The infective rate and average infectiosity of An.cantonensis in Ac.fulica were 38.41% and 36.65, and 20.14% and 8.33 in Am.gigas. Conclusion Maoming city is the natural focus of An.cantonensis in Guangdong, and the infection of Ac.fulica is more serious than Am.gigas now.