Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Eur J Protistol ; 46(3): 196-203, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20226640

RESUMO

Copidognathus nautilei Bartsch, 1997, from a hydrothermal vent field of the Mid-Atlantic Ridge at about 13 degrees N, 45 degrees W and 4090 m depth, was infested with the suctorian Corynophrya abyssalis n. sp., with up to 58 epizoans per mite. The new suctorian has a sacciform body with seven longitudinal ribs, a compact macronucleus and up to 40 non-retractile tentacles. The budding is exogenous. The systematic position of the new species and the genus Corynophrya is discussed, as well as infestation rates and sites of suctorians on their halacarid hosts.


Assuntos
Ácaros e Carrapatos/parasitologia , Fontes Termais/parasitologia , Cinetofragminóforos/classificação , Cinetofragminóforos/isolamento & purificação , Animais , Oceano Atlântico , Feminino , Cinetofragminóforos/citologia , Masculino , Microscopia
2.
J Eukaryot Microbiol ; 41(6): 602-7, 1994.
Artigo em Inglês | MEDLINE | ID: mdl-7866384

RESUMO

A total of 4.1% infestation with Chilodonella spp. was found among fish studied in 144 tanks in 1987-1989, representing 14.0% of the tanks in which fish are reared at four salmonid farms in northern Finland. Two species were found, C. hexasticha and C. piscicola, and both occurred on salmon (Salmo salar L.), sea trout [S. trutta m. trutta (L.)] and brown trout [S. t. m. lacustris (L.)]. Variability was observed in the length and width of the C. piscicola specimens and the number of ciliary rows or kineties. Large specimens which had more kineties than average for C. piscicola were found mainly on the skin of salmon aged 1-2 years. The number of kineties in the right ciliary band was found in stepwise logistic regression analysis to be of importance when typing C. piscicola specimens. Fingerlings were found to be more susceptible to Chilodonella infestation than older fish, and mortality varied in the range 2-10% in the course of the epizootics in the three fish species. Most mortality cases were caused by C. hexasticha, occurring mainly on the gills of the fish. Chilodonella piscicola was most often found in salmon and occurred at lower water temperatures than C. hexasticha (mean water temperature when found for the first time being 13 degrees C and 16 degrees C, respectively).


Assuntos
Infecções por Cilióforos/veterinária , Doenças dos Peixes/parasitologia , Pesqueiros , Cinetofragminóforos/isolamento & purificação , Salmão/parasitologia , Truta/parasitologia , Animais , Infecções por Cilióforos/parasitologia , Finlândia , Brânquias/parasitologia , Cinetofragminóforos/citologia , Pele/parasitologia
3.
J Eukaryot Microbiol ; 41(2): 103-11, 1994.
Artigo em Inglês | MEDLINE | ID: mdl-8167616

RESUMO

Protozoal concentrations were determined in rumen and cecal contents of 20 blue duikers (Cephalophus monticola). Ten animals of each sex were fed either a high concentrate or high roughage diet. Rumen protozoa were present in 19 of the 20 animals and concentrations ranged from 4.5 to 33.7 x 10(6) per g of rumen contents. At the higher concentrations, protozoal cells equaled between 30-40% of the total rumen contents volume. No protozoa were found in cecal contents. Weight of rumen contents was higher in females than in males (P < 0.01), and rumen protozoa concentrations were higher in males (P < 0.05) and in those animals fed the high concentrate diet (P < 0.05). All the protozoa were identified as belonging to a single species, Entodinium dubardi. However, an average of about 30% of the E. dubardi cells varied from the typical morphology of this species. These cells appeared to be on variation lines leading toward 7-10 other non-caudate species of Entodinium. The present data were used to evaluate and discuss the concept of variation lines within E. dubardi.


Assuntos
Antílopes/parasitologia , Cinetofragminóforos/isolamento & purificação , Rúmen/parasitologia , Animais , Feminino , Variação Genética , Cinetofragminóforos/citologia , Masculino , Especificidade da Espécie
4.
J Protozool ; 38(5): 483-8, 1991.
Artigo em Inglês | MEDLINE | ID: mdl-1920147

RESUMO

The morphology, infraciliature, and life cycle of Endosphaera terebrans, a suctorian endocommensal of peritrichs, have been studied with the aid of silver impregnation. The life cycle of Endosphaera terebrans begins with infection of the host cell by a small larva. The swarmer has a pointed needle-like cellular projection and two rings of cilia. The swarmer penetrates the the peritrich, loses the cilia, and then matures into an adult. The infraciliature of the adult form has four rows of barren kinetosomes that lack kinetodesmal fibers. By endogenous budding, a migratory larva is produced that leaves the host cell through the peristomial disc and that can infect other peritrichs.


Assuntos
Cinetofragminóforos/citologia , Animais , Cílios , Cilióforos/parasitologia , Cinetofragminóforos/crescimento & desenvolvimento , Larva , Morfogênese
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...