[Epidemiological investigation on the intermediate hosts of Paragonimus in Ninghai County of Zhejiang Province].
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).
Liu
Jian-Fa
JF
School of Medicine, Ningbo University, Ningbo, China.
Wu
Yan
Y
Tang
Zhi-Yuan
ZY
Meng
Dan
D
Yang
Shu-Juan
SJ
Jiang
Wen-Wen
WW
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*