Epidemiological study on the development of Fasciola hepatica eggs in the environment of Valdivia, Chile
Valenzuela, G.
Boletin Chileno de Parasitologia 34(1-2): 31-35
1979
ISSN/ISBN: 0365-9402 PMID: 540082 Document Number: 151680
The epidemiology of F. hepatica was studied under environmental conditions by incubating fluke eggs at outdoor temperatures. Eggs from bile of infected bovines killed at the Valdivian slaughter-house were put out at frequent invervals during a year in a bucket of water. The cultures were examined at weekly intervals until the eggs were in the hatching stage. The minimum period of development was in Jan. and the time of greatest development was in eggs put outside in late autumn and winter. Eggs put out in mid-April failed to hatch in autumn but remained viable in winter under experimental conditions and hatched during Sept.