CEPAVE   05420
CENTRO DE ESTUDIOS PARASITOLOGICOS Y DE VECTORES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Epizootiology of the parasite Srelkovimermis spiculatus (Nematoda: Mermithidae) in wild mosquito populations in Argentina.
Autor/es:
ACHINELLY MARÍA FERNANDA; MICIELI, MARÍA VICTORIA,
Lugar:
Ciudad Autónoma de Buenos Aires
Reunión:
Congreso; International Congress on Invertebrate Pathology and Microbial Control. 45th Annual Meeting of the Society for Invertebrate Pathology.; 2012
Institución organizadora:
Society for Invertebrate Pathology
Resumen:
Epizootiology of the parasite Strelkovimermis spiculatus (Nematoda: Mermithidae) in wild mosquito populations in Argentina   María Fernanda Achinelly 1, María Victoria Micieli 2 1,2  Centro de Estudios Parasitológicos y de Vectores, CEPAVE (CONICET-CCT La Plata-UNLP)-, calle 2 N° 584, (1900) La Plata, Buenos Aires, Argentina. Address for correspondence: fachinelly@cepave.edu.ar   Strelkovimermis spiculatus (Poinar & Camino, 1986) is a nematode parasite of mosquitoes isolated from the Neotropical region. In this study we investigated the bionomics and prevalence of this parasite, in wild-mosquito populations to a better understanding of the dynamics of this nematode in temporary breeding sites. Five grassy-pool habitats filled by rainwater were sampled during a year. Eight mosquito species were collected throughout all seasons: Anopheles albitarsis, Culex chidesteri, Culex dolosus, Culex maxi, Ochlerotatus albifasciatus, Psorophora ciliata, Psorophora cyanescens, and Psorophora albigenu. Six of these species were parasitized by S. spiculatus: C. chidesteri, C. dolosus, C. maxi, O. albifasciatus, P. ciliata, and P. cyanescens. This mermithid was more frequent from the end of winter (August) to the end of the spring (November). The parasitism ranged from 11 to 100%. High levels of infections were registered only in O. albifasciatus larvae. This species was the most abundant with the 95% of the total mosquito larvae sampled, followed by C. dolosus. Infectivity for other species did not exceed 1%. Strelkovimermis spiculatus completed its development in all infected wild-mosquito larvae. The presence of this nematode in six natural mosquito populations increases the number of susceptible species under natural and laboratory conditions to 24. The ability of this mermithid to infect mosquito species that breed in these habitats when they remain flooded for extensive periods of time, may point to a strategy of this parasite for maintain itself for a long time in environments that periodically dry up partially.   Presentation type: contributed poster Division: Nematodes