Observations on the lack of specificity of Spinitectus carolini and Spinitectus gracilis (Spirurida: Nematoda) for their intermediate hosts

Abstract

JILEK, R., and J. L. CRITES. 1981. Observations on the lack of specificity of Spinitectus carolini and Spinitectus gracilis (Spirurida: Nematoda) for their intermediate hosts. Can. J. Zool. 59: 476-477. Species representing 27 different genera of invertebrate animals were utilized in determining the intermediate host specificity of Spinitectus carolini and Spinitectus gracilis. A broad co-accommodation was demonstrated, as members of several different orders of insects were experimentally infected and observed to be naturally infected with both S. carolini and S. gracilis. This study also expands the intermediate host records for both S. carolini and S. gracilis. JILEK, R., et J. L. CRITES. 1981. Observations on the lack of specificity of Spinitectus carolini and Spinitectus gracilis (Spirurida: Nematoda) for their intermediate hosts. Can. J. Zool. 59: 476-477. Des esp&ces appartenant A 27 genres diffkrents d'invertkbrks ont kt6 utiliskes pour dkterminer la s@cificitk de l'h6te intermkdiaire de Spinitectus carolini et de Spinitectus gracilis. I1 semble y avoir une grande co-accomodation, puisque des insectes appartenant A plusieurs ordres peuvent Ctre infect& exph'imentalernent ou naturellement par S. carolini et S. gracilis.

The Life Cycle and Development of Spinitectus carolini Holl, 1928 (Nematoda: Spirurida)

“…The presence of melanin in the capsule walls has been demonstrated by Jilek and Crites (1980). This does, however, occur only after the larvae have reached their infective state, therefore being a time-related phenomenon, with the older encapsulations containing proportionally more melanin.…”

The influence of altitude, hydrographic network and season on brown trout parasites in Corsica using indicator species analysis

“…Many studies have shown that several species of the Spinitectus genus have an ephemeropteran as intermediate host. This has been reported for S. carolini , S. gracilis (Jilek & Crites, 1980, 1981, 1982; Gustafson, 1983), S. micracanthus (Keppner, 1975) and S. inermis (Saraiva et al , 2002b), a parasite of the European eel Anguilla anguilla present in Corsica.…”

“…According to Pereira-Bueno (1978), prevalence and intensity of fish infection reached their maxima in autumn and spring, when parasite recruitment occurs, but minima during the summer. One explanation for these differences may be the seasonal maturation cycle of R. gnedini, which is at least partly dependent on the water temperature (Chubb, 1982;Moravec, 2004 (Jilek & Crites, 1980, 1981, 1982Gustafson, 1983), S. micracanthus (Keppner, 1975) and S. inermis (Saraiva et al, 2002b), a parasite of the European eel Anguilla anguilla present in Corsica. One explanation for these differences may be the seasonal maturation cycle of R. gnedini, which is at least partly dependent on the water temperature (Chubb, 1982;Moravec, 2004 (Jilek & Crites, 1980, 1981, 1982Gustafson, 1983), S. micracanthus (Keppner, 1975) and S. inermis (Saraiva et al, 2002b), a parasite of the European eel Anguilla anguilla present in Corsica.…”

In vitro infection experiments with eggs of the nematode Contracaecum rudolphii Hartwich, 1964 (sensu lato) targeting aquatic insect larvae (Odonata: Coenagrionidae and Libellulidae; Trichoptera: Integripalpia) as possible intermediate hosts

“…Numerous parasites are capable of using the larvae of insects representing the orders Ephemeroptera, Plecoptera, Diptera, Trichoptera, and Odonata as intermediate hosts (Jilek & Crites 1981, Moravec & Škoriková 1998, Saraiva et al 2002. In this study, the nematode larvae were present in the bodies of the odonates and trichopterans exposed to nematode eggs and freeswimming larvae, as well as in the infected cyclopoids.…”