Figure 3. Occurrence of Angiostrongylus cantonensis according to hosts in mainland China, 2006/2007.

Each point represents a county where the national survey was implemented. All field sites are located within a region delimited by northern latitude 18°13′–34°50′ and eastern longitude 97°50′–122°07′. The results pertaining to two invasive snail species, i.e., Pomacea canaliculata and Achatina fulica, are highlighted, and the infection status of other animals was omitted whenever infected snails were found in the same places.