INVESTIGADORES
ETCHEGOIN Jorge Alejandro
artículos
Título:
Population dynamic of two digenean species parasitizing
Autor/es:
PARIETTI, MANUELA; MERLO, MATÍAS J.; ETCHEGOIN, JORGE A.
Revista:
ACTA PARASITOLOGICA
Editorial:
VERSITA
Referencias:
Lugar: Varsovia; Año: 2015 vol. 60 p. 124 - 129
ISSN:
1230-2821
Resumen:
The microphallids Microphallus szidati and Levinseniella cruzi
parasitized at least three crustacean species as second intermediate host
in Mar Chiquita coastal lagoon: the crabs Neohelice granulata and Cyrtograpsus
angulatus and the grass shrimp Palaemonetes argentinus. Palaemonetes
argentinus acts as host for both metacercariae in brackish and freshwater
environments; however the seasonal variations of these digeneans in freshwater
habitats remain unexplored. The aim of the present study was to analyze the
seasonal dynamic of the larval digenean populations parasitizing P.
argentinus in a lentic environment. From the total sample of 600 P.
argentinus collected seasonally, 28.370 and 194 metacercariae of M.
szidati and L. cruzi, respectively, were recovered. Microphallus
szidati was characterized by high prevalence, 100% in all seasons. In
contrast, L. cruzi presented low prevalence values, which increased
towards summer. The two species of digeneans exhibit seasonal fluctuations in
intensity of infection, which was related to host size. Temporal variation of
larval digenean assemblage in the crustacean host is probably associated with
the presence of the other hosts included in their life cycles. The high values
of prevalence found for M. szidati in Nahuel Rucá lagoon suggest that P.
argentinus could favor the contact between the larval digenean and the definitive
hosts, establishing the presence of M. szidati also in freshwater
environments and, thus, increasing the presence of the parasite in different
areas of Mar Chiquita coastal lagoon.