A new species of Trichuris from Thrichomys apereoides (Rodentia: Echimyidae) in Brazil: Morphological and histological studies.
Trichuris thrichomysi n. sp., recovered from the cecum of the wild rodent Thrichomys apereoides from a transition zone between the Atlantic Forest and Cerrado morfoclimatic domains, and its life cycle observed under experimental conditions are described. This new species is closely related to Trichuris travassosi, Trichuris chiliensis and Trichuris fulvi, but can be distinguished from them mainly by differences in the posterior end of males. Details of the surface such as the bacillary gland, cuticular inflations and several morphological details obtained by scanning electron microscopy and field emission scanning electron microscopy confirmed the characteristics that differentiate the new species. The histopathology of the intestinal wall of naturally infected rodents is also reported. The present study extends the geographical distribution of T. thrichomysi n. sp to the Pantanal ecosystem and reports a new host, Thrichomys pachiurus.
Laboratório de Biologia de Helmintos Otto Wucherer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho, s/n Centro de Ciências da Saúde, Bloco G, CEP: 21941-902, Rio de Janeiro, Brazil. ejtorres@biof.ufrj.br
Eduardo J Lopes
EJ
Torres
Ariel P F
AP
Nascimento
Aleksandra O
AO
Menezes
Juberlan
J
Garcia
Marcos Antônio José
MA
dos Santos
Arnaldo
A
Maldonado
Kildare
K
Miranda
Reinalda M
RM
Lanfredi
Wanderley
W
de Souza
D000818:Animals; D001938:Brazil / Q000453:epidemiology; D005260:Female; D008297:Male; D012376:Rodent Diseases / Q000453:epidemiology / Q000469:parasitology*; D012377:Rodentia / Q000469:parasitology*; D013045:Species Specificity; D014257:Trichuriasis / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D014258:Trichuris / Q000033:anatomy & histology* / Q000145:classification*