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Larval trematodes of Schistosoma mamsoni transmitting snails, Biomphalaria spp., in northeastern Argentina

100%

Ostrowski de Nunez M. , Hamann M. I. , Rumi A.

Acta Parasitologica Polonica

1990

tom 35

nr 2

Population dynamics of planorbid snails from a lenitic biotope in northeastern Argentina. Larval trematodes of Biomphalaria occidentalis and analysis of their prevalence and seasonality

100%

Ostrowski de Nunez M. , Hamann M. I. , Rumi A.

Acta Parasitologica Polonica

1991

tom 36

nr 4

Larval survival strategy during winter of Chordodes nobilii Camerano, 1901 [Gordiida, Nematomorpha]

100%

Zanca F. , De Villalobos C. , Rumi A.

Acta Parasitologica

2007

tom 52

nr 4

There are numerous open questions concerning the life cycle of Gordiida (Nematomorpha), especially about egg development and viability of larvae during winter, when the temperature of freshwater environments where they inhabit is low. On the basis of experimental studies we demonstrate that egg development of Chordodes nobilii takes 20–25 days at 22°C and 45–55 days at 5°C. We also observed that larvae of C. nobilii obtained from egg strings at 5°C and maintained at that temperature during six months remained inside their egg shells as a survival strategy.

Paratenic hosts: larval survival strategy of Paragordius varius [Leidy, 1851] [Gordiida, Nematomorpha]

88%

De V. C. , Rumi A. , Nunez V. , Schmidt-Rhaesa A. , Zanca F.

Acta Parasitologica

2003

tom 48

nr 2

There are numerous open questions concerning the life cycle of horsehair worms (Nematomorpha), especially about the parasitic phase. Complete development takes place only in a few host species. These hosts, almost exclusively arthropods, may be infected directly or indirectly through a paratenic host which carries larvae and cysts of hairworms and was infected in an aquatic habitat. Even though different aquatic animals have been cited as paratenic hosts, little is known about the viability of the larvae or the cysts inside them. On the basis of experimental infections we demonstrate that the larvae entering a paratenic host (Physella cubensis) do not encyst immediately and that larvae and cysts can infect a second paratenic host (Jenynsia multidentata).