CEPAVE   05420
CENTRO DE ESTUDIOS PARASITOLOGICOS Y DE VECTORES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Helminth communities in two cricetids rodents from a secondary rain forest of Misiones, Argentina
Autor/es:
NOTARNICOLA, JULIANA
Lugar:
Mendoza
Reunión:
Congreso; 10th International Mammalogical Congress; 2009
Institución organizadora:
Biodiversity Research Group- SAREM
Resumen:
The reserve UNLP Valle del Arroyo Cuñá Piru (27º05’S; 54º09’W) is located in the central hills of Misiones, northeast Argentina, an area originally covered by Interior Atlantic Forest, currently largely represented by ‘capueras’ (secondary forest). Despite Akodon montensis and Oligoryzomys nigripes (Cricetidae) are the two most commonly trapped rodents in the area their parasite fauna has not been described. Here I provide the first description of their helminth communities. Rodents were trapped using 180 Sherman live traps arranged in 15 concentric circles 12 traps each, forming a ‘trapping-web’. Mice were trapped, marked, and released on the first five consecutive nights, collected on both the sixth and seventh nights, and prospected for parasites. Eight species of helminthes were recovered from A. montensis (n=61). Nippostrongylina (2 genera included) (Prevalence [P] = 68.8%; Mean Intensity [MI] = 48.7) and Trichofreitasia sp. (P=6.2%; MI=5.7), Trichuris n. sp. (Trichuridae) (P= 52.4%; MI=2.5), Syphacia carlitosi (Oxyuridae) (P=27.8%; MI=10.4), and Litomosoides sp. (Onchocerdicae) (P=1.6%; MI=1); a Cyclophyllidea cestod (P=70,4%; MI=2,9) and a Diplostomidae trematode (P=1,6; MI=8). In O. nigripes (n=22) six species of helmithes were recorded including the Nippostrongylina Guerrerostrongylus zetta and other undescribed species (P=90.9%; MI=48.7), S. kinsellai (P= 22.7%; MI= 30.6), Trichuris sp. (P=4.5; MI=1), L. odilae (P= 4.4, MI=4), and a Cyclophyllidea (P=13.6%; MI=1). Nippostrongylina helminthes and Syphacia spp. were the dominant parasite species on both host rodents. While the “core species” (those with high P and MI) were also represented by the Nippostrongylina. The “satellite species” in A. montensis were represented by Trichofreitasia, S. carlitosi, and Litomosoides sp., and in O. nigripes by the remaining parasite species. No “secondary species” was identified. The cestode and Trichuris from A. montesis could not be assigned to any category since they have medium to high P but low intensity. Litomosoides sp. and Trichuris sp. are accidental species since only one imature specimen was collected.