CEPAVE   05420
CENTRO DE ESTUDIOS PARASITOLOGICOS Y DE VECTORES
Unidad Ejecutora - UE
artículos
Título:
Parasite Community (Arthropods and Filarioids) Associated with Wild Rodents from the Marshes of La Plata River, Argentina.
Autor/es:
MARCELA LARESCHI; JULIANA NOTARNICOLA; SANTIAGO NAVA; GRACIELA NAVONE
Revista:
Comparative Parasitology
Referencias:
Año: 2007 vol. 74 p. 141 - 147
ISSN:
1525-2647
Resumen:
We investigated the parasite community (arthropods and filarioids) associated with wild rodents from a marshy area in Buenos Aires province, Argentina. During 1995 and 1996, 105 sigmodontine rodents were trapped in The Reserva Selva Marginal de Punta Lara and in La Balandra (Argentina). Six sigmodontine species with a relative density (RDI) of 11.1% were trapped. A total of 3,371 specimens from 16 species of arthropods and 2 species of filarioids were collected. The values of parasite species richness (S) and prevalence (P) were as follows: from Scapteromys aquaticus S¼9; P¼96%, fromScapteromys aquaticus S¼9; P¼96%, from Oligoryzomys spp. S¼8; P¼100%, from Oxymycterus rufus S¼8; P¼93%, and from Akodon azarae S¼6; P¼93%. The single Deltamys kempi captured was not parasitized. Parasite communities of S. aquaticus and Ox. rufus showed the highest similarity resulting from their overlapped microhabitats, not only when presence/absence of species was considered (Sorenson’s index; Css ¼82%), but also when the proportion of every species was taken into account (Pianka’s index; O ¼spp. S¼8; P¼100%, from Oxymycterus rufus S¼8; P¼93%, and from Akodon azarae S¼6; P¼93%. The single Deltamys kempi captured was not parasitized. Parasite communities of S. aquaticus and Ox. rufus showed the highest similarity resulting from their overlapped microhabitats, not only when presence/absence of species was considered (Sorenson’s index; Css ¼82%), but also when the proportion of every species was taken into account (Pianka’s index; O ¼Deltamys kempi captured was not parasitized. Parasite communities of S. aquaticus and Ox. rufus showed the highest similarity resulting from their overlapped microhabitats, not only when presence/absence of species was considered (Sorenson’s index; Css ¼82%), but also when the proportion of every species was taken into account (Pianka’s index; O ¼¼82%), but also when the proportion of every species was taken into account (Pianka’s index; O ¼ 26.67). The 2 species of filarioids collected were restricted to Oligoryzomys spp. and Ox. rufus. The absence of lice and filarioids from Ox. rufus from La Balandra suggests an isolation of this host population from the northern localities. Considering arthropod–filarioid associations, a significant affinity was observed from Ox. rufus from Punta Lara, betweenOligoryzomys spp. and Ox. rufus. The absence of lice and filarioids from Ox. rufus from La Balandra suggests an isolation of this host population from the northern localities. Considering arthropod–filarioid associations, a significant affinity was observed from Ox. rufus from Punta Lara, betweenOx. rufus from La Balandra suggests an isolation of this host population from the northern localities. Considering arthropod–filarioid associations, a significant affinity was observed from Ox. rufus from Punta Lara, betweenOx. rufus from Punta Lara, between Litomosoides oxymycteri and the mite Ornithonyssus bacoti. Scapteromys aquaticus and Ak. azarae may not be susceptible to filarioids; although Or. bacoti were recovered from both.and the mite Ornithonyssus bacoti. Scapteromys aquaticus and Ak. azarae may not be susceptible to filarioids; although Or. bacoti were recovered from both.Or. bacoti were recovered from both.