New host, geographic records, and histopathologic studies of Angiostrongylus spp. (Nematoda: Angiostrongylidae) in rodents from Argentina, with updated summary of records from rodent hosts and host specificity assessment

ROBLES, M. R.; KINSELLA J. M.; GALLIARI, C.; NAVONE, G. T.

MEMóRIAS DO INSTITUTO OSWALDO CRUZ.

FUNDACO OSWALDO CRUZ

Lugar: Rio de Janeiro; Año: 2016

0074-0276

To date, 21 species of the genus Angiostrongylus (Nematoda: Angiostrongylidae) have been reported around the world, and 15 species parasite rodents. In this study, new host, geographic records, and histopathologic studies of Angiostrongylus spp. in sigmodontine rodents from Argentina, with updated summary of records from rodent hosts and host specificity assessment are provided. As results, Angiostrongylus costaricensis from Akodon montensis and Angiostrongylus morerai from six new host and geographical rodents in Argentina are reported. The gross and histopathologic changes in the lungs of the host species due to angiostrongylosis are described. Moreover, comprehensive data on all the records of the genus Angiostrongylus from rodents and patterns of host specificity are presented. Angiostrongylus species parasitize between one and 19 different host species. The most frequent values of STD were between 1 and 5.97, level to different orders. The elevated number of host species (n=7) of A. morerai with a STD= 1.86 is a reflection of systematic studies of parasites from sigmodontine rodents in the area of Cuenca del Plata Argentina, showing that an increase in sampling effort can result in new findings. Accordingly, the low host specificity and the low influence on geographic distribution of Angiostrongylus spp., this study would indicate a troubling epidemiological scenario.