Litomosoides silvai (Nematoda: Onchocercidae) parasitizing Akodon montensis (Rodentia: Cricetidae) in the southern region of Brazil

Abstract

In the present study, Litomosoides silvai parasitizing Akodon montensis in the southern region of Brazil is reported for the first time. New morphological information is provided for some structures of this nematode species, such as a flattened cephalic extremity, presence of two dorsal cephalic papillae, female tail with a constriction at its tip, "s" shaped vagina, spicules characteristic of the carinii species group and microfilaria tail constricted at the tip. This nematode was found parasitizing the thoracic cavity with a prevalence of 10% (2/20), mean intensity of 4 (6/2), mean abundance of 0.4 (8/20) and range of infection of 2-6 specimens per host, in southern Brazil. This occurrence of L. silvai in A. montensis is a new geographical record for southern Brazil, in the Upper Paraná Atlantic Forest ecoregion of the northwestern region of Rio Grande do Sul, which is part of the Atlantic Forest biome.

Helminth metacommunity structure of wild rodents in a preserved area of the Atlantic Forest, Southeast Brazil

“…Considering the helminth fauna of A. montensis, all helminth species found in the present study were previously reported (MALDONADO Jr. et al, 2010;SIMÕES et al, 2011;PANISSE et al, 2017). Other genera and species already registered for this host include Angiostrongylus lenzii, S. lanfrediae, Syphacia carlitosi, Litomosoides silvai, Trichuris sp., Echinostoma luisreyi in Brazil (SIMÕES et al, 2011;GRESSLER et al, 2017), Eucoleus sp., Platynosomoides sp., Tapironema coronatum and Trichuris navonae in Argentina (ROBLES, 2011;PANISSE et al, 2017).…”