AI Article Synopsis

  • Freshwater crabs and snails were collected in Ninghai County, Zhejiang Province, to study the presence of Paragonimus metacercariae and cercariae.
  • Among the 97 crabs examined, 11.3% tested positive for metacercariae, with higher prevalence in lighter weight groups.
  • No cercariae or metacercariae were detected in 200 snails of the species Semisulcospira libertino.
  • The male-to-female ratio of crabs was 2.5:1, with no significant prevalence differences between genders.

Article 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).

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