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Eimeria bubonis n.sp. and Caryospora bubonis n.sp. both from Bubo virginianus from Saskatchewan, Canada, are described. E. bubonis differs from E. speotytoi and E. strigis in having shorter and narrower sporulated oocysts (22.8 plus or minus 2.7 mu m long and 21.7 plus or minus 2.4 mu m wide) with a...
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In further laboratory studies in Canada [see preceding abstract], 12 h after infection 1st-stage larvae of Diplotriaena tricuspis had hatched, penetrated the gut wall, and entered the fat-body of the grasshopper Melanoplus sanguinipes (F.) and the locust Schistocerca gregaria (Forsk.). Capsule devel...
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Three B. virginianus were each inoculated orally with 1.0 X 104 sporulated oocysts of E. bubonis and 3 were each fed 2 mice which had been previously intubated with sporulated oocysts of E. bubonis. In the directly infected owls the prepatent period was 5 to 6 days and the patent period was 4 and 6 ...
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Crows (Corvus brachyrhynchos) were experimentally infected with Diplotriaena tricuspis (50 to 530 larvae/bird) and killed at intervals from 4 to 291 days afterwards. The larvae caused traumatic lesions during their movements through the hepatic portal system. Giant cell granulomata surrounded dead n...
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Sporocysts of Sarcocystis were recovered from the intestinal mucosa of A. acadicus from Yellowstone National Park, Wyoming, USA. Sporocysts measured 12.0 x 9.7 micro m (9.6-14.0 x 8.0-12.0 micro m; n = 100). Doses of 0, 500, and 2500 sporocysts were administered orally to 5 P. maniculatus and 5 Swis...
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Lasalocid and pyrimethamine was administered to American lobsters infected with A. haemophila. Lasalocid was found to be toxic and acute mortality was observed, when administered in vivo in both infected and uninfected lobsters. Pyrimethamine was found very efficient to treat these ciliates at repea...
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This study describes the sequential formation of lesions associated with the endogenous development of Sarcocystis rauschorum (Apicomplexa: Sarcocystidae) in varying lemmings, Dicrostonyx richardsoni. Lethal doses of sporocysts (greater than 500) were orally administered to lemmings examined 1-6 day...
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The American lobster fishery is a significant economic driver in coastal communities of North America. Increasingly, the impacts of infectious disease are recognized as important components and factors in the population ecology and subsequent management of the lobster fishery. Both environmental and...
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Shell disease is a major threat to the American lobster ( Homarus americanus, Milne Edwards) fishery. Here we describe the composition of microbial communities associated with lesions of 2 forms of shell disease in Atlantic Canada, ( i) a trauma shell disease (TSD) characterized by massive lesions a...
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The intermediate hosts for Sarcocystis rileyi (Stiles 1893) Minchin 1913 are ducks (Anas spp.), and the striped skunk (Mephitis mephitis) is its definitive host. The structure of sarcocysts from an experimentally infected shoveler duck (Anas cylpeata) fed sporocysts from an experimentally-infected M...
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Two cases of Amoeba-like infections in cultured warmwater marine fish are described, a systemic infection in pompano T. falcatus from Singapore and a gill infection in Mediterranean (Greece) sea bream S. auratus. All pompano showed marked systemic infection of Amoeba-like parasites in the gills, kid...
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A tetrazolium-based cytotoxicity assay was modified to determine the anti-protozoal activity of compounds towards the lobster parasite A. haemophila. To obtain reproducible results, A. haemophila maintained in continuous culture were preferable to freshly isolated A. haemophila. It was also found th...
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Recent (1993) landings of American lobsters (Homarus americanus) were valued at $294 million (Can.) in Canada and $213 million (Can.) in the United States. However, post-harvest losses are estimated at $50-75 million (10-15%) annually. The lobster fishery is one of the few remaining viable tradition...
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We have determined the nucleotide sequence of the nuclear gene encoding small-subunit ribosomal ribonucleic acid of the ciliate Anophryoides haemophila, a parasite of the American lobster Homarus americanus. The gene is 1763 bp in length, and has a guanosine-plus-cytosine content of 43.9%. Inferred ...
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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 &...
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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...
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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...
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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...
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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...
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Spores identified as Myxobolus neurobius were found in head homogenates of both wild young Atlantic salmon Salmo salar and Arctic char Salvelinus alpinus . Formalin-preserved spores from Atlantic salmon measured an average of 12.9 x 9.4 mu m and contained two polar capsules that measured 6.4 x 2.9 m...
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The levels of production, ascarid burden and respiratory disease were measured on 15 purposively selected swine herds, and the relationships between the various measures of ascarid burden were examined. On each farm 30 randomly selected pigs were weighed and rectal fecal samples were collected at ap...
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