title: [Epidemiological investigation on the intermediate hosts of Paragonimus in Ninghai County of Zhejiang Province].
abstract: Freshwater crabs and snails were collected from Ninghai County in Zhejiang Province, and examined respectively for Paragonimus metacercariae and cercariae. Among 97 freshwater crabs found, the prevalence was 11.3% (11/97) with a mean intensity of 1 metacercariae per crab. It was 10.2% (5/49) and 20.2% (4/20) in the groups weighted 5-15 g and 15-25 g respectively, with an average intensity of 1, and no metacercariae were found in weight group of 25-35 g. Two positive crabs were found from 20 crabs with a low weight (< 5 g). Male to female crabs ratio was 2.5:1, and there was no significant difference in prevalence between males [12.7%(7/55)] and females [9.1% (2/22)]. No cercariae or metacercariae were found in 200 snails (Semisulcospira libertino).
authors.affiliation: School of Medicine, Ningbo University, Ningbo, China.
authors.forename: Jian-Fa
authors.initials: JF
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Wu
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Tang
authors.forename: Dan
authors.initials: D
authors.lastname: Meng
authors.forename: Shu-Juan
authors.initials: SJ
authors.lastname: Yang
authors.forename: Wen-Wen
authors.initials: WW
authors.lastname: Jiang
mesh_terms: D000818:Animals; D003386:Brachyura / Q000469:parasitology*; D002681:China / Q000453:epidemiology; D005260:Female; D005618:Fresh Water; D006790:Host-Parasite Interactions; D008297:Male; D010237:Paragonimiasis / Q000453:epidemiology* / Q000469:parasitology; D010238:Paragonimus; D012908:Snails / Q000469:parasitology*