Results

1 - 25 of 102
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The potential for cross-transmission of Perkinsus karlssoni from bay scallops Argopecten irradians to various native Atlantic Canadian species of shellfish was investigated. Lateral proximal transmission was investigated whereby infected moribund bay scallops were maintained with uninfected individu...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Improved rates of in vitro excystation of sporozoites from sporocysts of Sarcocystis capracanis, Sarcocystis cruzi, and Sarcocystis tenella were obtained by pretreating sporocysts with an aqueous sodium hypochlorite (NaOCl) solution followed by incubation in excysting fluid (EF). After pretreatment ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Two hundred and eleven of 4404 (4.8%) crows (Corvus brachyrhynchos) collected in the winters of 1976-77 and 1977-78 in Essex County, southwestern Ontario, were infected with Diplotriaena tricuspis (Fedtschenko, 1874) Henry and Ozoux, 1909. Prevalence of potentially patent infections was only 2.6%, h...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The site of development, survival of larvae, and reaction to the presence of Physaloptera maxillaris [a nematode parasite of the skunk Mephitis mephitis that has arthropod intermediate hosts] are described in Gryllus pennsylvanicus Burm. (Acheta pennsylvanicus) and Blattella germanica (L.) from obse...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Studies were undertaken to monitor for the presence of Borrelia burgdorferi, the etiologic agent of Lyme disease, on Prince Edward Island, Canada. Gut contents were removed for culturing from seven engorged ticks collected in 1991-1992 including five Ixodes dammini (Spielman, Clifford, Piesman &...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Oocysts of Eimeria stigmosa isolated from a wild juvenile lesser snow goose (Anser caerulescens caerulescens) were used in experimental infections of laboratory-reared geese. The structure of oocysts is described; a peculiar bumpy surface and a calyx-like thickening around the micropyle are illustra...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
In North America, one of the largest traditional surviving fisheries involves the coldwater clawed American lobster Homarus americanus. However, post-harvest losses are conservatively estimated at 10-15%, representing an economic impact of $50-75 million annually. The mandate of the Lobster Health R...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
In 1989, an unidentified protistan parasite, QPX (Quahaug Parasite X), was found in quahaugs Mercenaria mercenaria (Linnaeus, 1758) from a hatchery on Prince Edward Island, Canada, which was suffering extensive mortalities. The parasite was identical to one reported from mass mortalities of wild pop...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The development of the sarcocyst of Sarcocystis rauschorum in its intermediate host was studied. Lemmings were orally administered sporocysts of S. rauschorum obtained from snowy owls (Nyctea scandiaca). Beginning at 9 days postinoculation (DPI) and at various intervals to 84 DPI, skeletal muscle ti...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
A genomic library of Sarcocystis cruzi sporozoite DNA was constructed in bacteriophage lambda gt10. Recombinant phages containing insert DNA were selected by growth on Escherichia coli strain C600 hflA150. Of 14 clones examined, 11 contained DNA inserts ranging in size from approximately 1.45 kiloba...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The status of Perkinsus parasites continues to challenge scientists. Are they fungi or protistans? Are they apicomplexans? How many species of Perkinsus exist? Molecular biology is a powerful tool which has been used to address these questions of taxonomy and phylogeny. In particular, nucleotide seq...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Zygote development and oocyst wall formation of Eimeria truncata occurred in epithelial cells in renal tubules and ducts of experimentally infected lesser snow geese (Anser c. caerulescens). Post-fertilization stages were present throughout the kidneys beginning nine days post-inoculation. Initially...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
To study the potential for transmission of Perkinsus karlssoni, an apicomplexan parasite, among bivalve hosts, a long-term laboratory-scale, closed, artificial seawater system for shellfish was designed. Species of shellfish utilised were as follows: bay scallops, Argopecten irradians; blue mussels,...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Two coccidia-free N. scandiaca were fed bradyzoites of S. rauschorum from varying lemmings (Dicrostonyx richardsoni). At necropsy 7 days later zygotes, oocysts in various stages of sporulation, and fully sporulated oocysts were observed only in the lamina propria of the small intestine. Sporogony of...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Visceral and systemic infection with a Dermocystidium -like organism was diagnosed recently in post-seawater entry smolts of Atlantic salmon farmed in the Bay of Fundy. In late summer and early fall, young fish developed "black smolt" disease, characterized by anorexia, lethargy and black skin. Para...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The objective of this study was to identify risk factors for productivity losses in the Canadian lobster industry. Lobster handling and fishing practices onboard 64 fishing boats and transportation conditions on 49 vehicles subsequently transporting these lobsters from fishing wharves to processing ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Free sporocysts of a Sarcocystis-like organism (11.6 x 9.2 micro m with a diffuse residuum of numerous small refractile granules) from intestinal scrapings of an N. scandiaca from Saskatchewan, Canada, were orally administered to laboratory-reared D. richardsoni. Merants were present in hepatocytes ...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Anophryoides haemophila is a ciliated protozoan and the causative agent of bumper car disease in lobsters. An in vitro system was developed to assess the effects of chemotherapeutants on ciliate motility and morphology. Monensin, formaldehyde and pyrimethamine + sulphaquinoxaline caused a dose-depen...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
This case report provides pathologic and confirmatory molecular characterization of an outbreak of bumper car disease caused by the scuticociliate Anophryoides haemophila in American lobster Homarus americanus, from a commercial holding facility in Nova Scotia, Canada. Although sporadically and anec...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Skeletal and cardiac muscle from wild geese dead of avian cholera was examined and sarcocysts were found in skeletal muscle of 42 of 88 Lesser Snow Geese, Anser caerulescens caerulescens, 1 of 7 Ross Geese, Anser rossi, and 1 of 3 Canada Geese, Branta canadensis, collected during April and May in ce...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Besnoitia was diagnosed in 2 caribou (Rangifer tarandus caribou) which died of pneumonia at the Assiniboine Park Zoo, Winnipeg, Manitoba, Canada, in 1983. During the following 3 years, besnoitiosis spread to an isolated herd of caribou, to mule deer (Odocoileus hemionus hemionus) and to reindeer (R....
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Sporozoites of S. hirsuta, although they also penetrated into bovine monocytes, developed to the schizogonous phase only in bovine pulmonary artery endothelial cells. Schizonts were evident from 14 days after sporozoite inoculation (DAI) and persisted to 62 DAI, when experiments were terminated. Mer...