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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 94, No. 1, 1999, pp. 31-35
Bioline Code: oc99010
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 94, No. 1, 1999, pp. 31-35

 en Some Aspects of the Development of Lobatostoma jungwirthi Kritscher, 1974 (Aspidogastrea) in Snails and Cichlid Fishes from Buenos Aires, Argentina
María Inés Zylber & Margarita Ostrowski de Núñez


The molluscs Heleobia castellanosae and Ampullaria canaliculata and cichlid fishes were collected from an artificial pond at Tres de Febrero Park (Buenos Aires city), between June 1994 and May 1995. One hundred and eighty of 2,467 H. castellanosae examined were infected with pre-adults of Lobatostoma jungwirthi, 112 of them in concurrent infections with digeneans. L. jungwirthi was
significantly more prevalent in larger snails, especially those infected with larval digeneans, but
the prevalence of infection did not fluctuate significantly throughout the year. A.
canaliculata and cichlids smaller than 10 cm were not infected, but larger Cichlasoma
facetum harboured adults of L. jungwirthi in their intestines. Experimental
infections of C. facetum and Gymnogeophagus meridionalis with pre-adult
aspidogastreans obtained from H. castellanosae were successful. The
development of L. jungwirthi in the snail host involves five arbitrary growth
phases.Its life-cycle is heteroxenous, similar to that described for L. manteri,
with H. castellanosae as the intermediate host and cichlid fishes as the definitive host
in this pond.

Aspidogastrea - Lobatostoma jungwirthi - Heleobia castellanosae - concurrent infections - prevalence of infection - seasonality - Buenos Aires - Argentina

© Copyright 1999 Fundacao Oswaldo Cruz - Fiocruz
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