ABSTRACT
Abstract Litomosoides chagasfilhoi, originally described by Moraes Neto, Lanfredi & De Souza (1997) parasitizing the abdominal cavity of the wild rodent, Akodon cursor (Winge, 1887), was found in the abdominal cavity of Nectomys squamipes (Brants, 1827), from the municipality of Rio Bonito, Rio de Janeiro State, Brazil. This study led to addition of new morphological data and a new geographical distribution for this filarioid in Brazil. Several characters were detailed and emended to previous records of L. chagasfilhoi in N. squamipes, and confirming the original description in A. cursor: buccal capsule longer than wide with walls thinner than the lumen, right spicule slightly sclerotized, with membranous distal extremity slender, with a small tongue-like terminal portion, left spicule with handle longer than the blade, whose edges form large membranous wings folded longitudinally.
Resumo Litomosoides chagasfilhoi, originalmente descrito por Moraes Neto, Lanfredi & De Souza (1997) parasitando a cavidade abdominal do roedor silvestre Akodon cursor (Winge, 1887), foi encontrado na cavidade abdominal de Nectomys squamipes (Brants, 1827), no município de Rio Bonito, Estado do Rio de Janeiro, Brasil. Este estudo propiciou a adição de novos dados morfológicos e uma nova distribuição geográfica deste filarídeo no Brasil. Vários caracteres foram detalhados e adicionados ao registro anterior de L. chagasfilhoi em N. squamipes, e confirmando a descrição original em A. cursor: cápsula bucal mais alta do que larga com paredes mais finas que o lúmen, espículo direito ligeiramente esclerotizado, com extremidade distal membranosa mais estreita, com uma pequena porção terminal em forma de língua, espículo esquerdo com cabo mais longo do que a lâmina, cujas bordas formam grandes asas membranosas dobradas longitudinalmente.
Subject(s)
Animals , Rodent Diseases/parasitology , Sigmodontinae/parasitology , Filarioidea/anatomy & histology , Rodentia , Brazil , Filarioidea/ultrastructureABSTRACT
Scanning Electron Microscopic (SEM) observations were made on the adult worms of Brugia malayi from rodent hosts. Descriptions of the surface features of mouth, vulva, anus, caudal papillae and spicules are given.
Subject(s)
Animals , Brugia/anatomy & histology , Female , Filarioidea/ultrastructure , Gerbillinae , Male , Microscopy, Electron, ScanningABSTRACT
The in vitro effect of immune monkey serum on microfilariae of Brugia malayi was investigated using the electron microscope. The sheaths of microfilaria incubated with immune serum were seen to be covered with electron dense precipitates. After 24 hours of incubation, majority of microfilariae incubated with immune serum exhibited degenerative changes. Comparable changes were not seen in microfilariae incubated with normal serum. The significance of these observations are discussed.