Fasciola Gigantica: the parasite burden inLymnaea natalensisthat died after a cercarial shedding

Autor: C. Da Costa, Rakotondravao, G. Dreyfuss, Daniel Rondelaud
Rok vydání: 1995
Předmět:
Zdroj: Parasite. 2:177-181
ISSN: 1776-1042
1252-607X
DOI: 10.1051/parasite/1995022177
Popis: Summary : Histological studies were carried out in Lymnaea natalensis to determine why the number of Fasciola gigantica cercariae decrea­ sed when the patent period duration increased. Observations were performed in snails killed between days 30 and 1 35 after exposure, and in snails that died following a cercarial shedding between days 53 and 172 after exposure (at 23 °C). Free and degenerated rediae became increasingly numerous as experiment duration increased; they represented 60 % and more of the redial burden after day 135. Free and degenerated cercariae increased in numbers after day 75, and predominated in older snails.
Databáze: OpenAIRE