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A skin disease of intensively reared rainbow trout in Ontario, Canada, known to the farmers as 'no-mucus skin disease' , is reported for the first time. It is characterized by erosive and ulcerative lesions found mainly on the flanks of fingerlings which results in exposure of the tips of the scales...
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Sampling of the demersal fishes in part of the Madeleine Plateau (4T) was carried out between 21st and 27th Aug 1974. The best mean catch of cod was made in the west. There was a correlation between the regions of best yields and those where the bottom temp was between 1 {degree} and 4 {degree}C. Fe...
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Observations were carried out on the catches of 2 fixed fishing gears in the upper estuary of the St-Lawrence during the 1974 season (June-Oct) as part of a programme for improving fixed fishing gears. The total catch of the experimental fishery was 18,034 (36 spp) and of the control, 5,367 (35 spp)...
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By cross hybridization with the mammalian growth-related protein, GAP-43, we have isolated several Drosophila cDNAs and genomic sequences. These sequences correspond to a single copy gene that encodes two developmentally regulated transcripts 2.4 and 2.0 kb in length. The predicted protein sequence ...
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The results showed that mpk-1 plays an important functional role as an activator in ras-mediated cell signalling in vivo in C. elegans..
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The epidemiology and importance of coagulase negative staphylococcal (CNS) mastitis in Prince Edward Island had not been documented. To investigate this, a cohort of 84 cows at seven farms were quarter sampled eight times over a lactation, commencing with samples taken prior to drying off in the pre...
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Mitogenic responsiveness of intestinal intraepithelial lymphocytes (i-IEL) to concanavalin A (Con A), phytohemagglutinin P (PHA-P), and lipopolysaccharide (LPS) from Salmonella typhimurium were evaluated in various age groups of turkeys by a colorimetric blastogenic microassay. Comparisons were made...
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Glutamic acid (GA) and kainic acid (KA) are structurally related to domoic acid (DOM), a neurotoxic amino acid that caused human food poisoning in 1987, following consumption of toxic mussels (Mytilus edulis ) from Prince Edward Island, Canada. To study the difference in response of mussels to a phy...
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Two invertebrate haemoglobins (Hb) from Ascaris suum and Lucina pectinata in which residues E7 and B10 are a glutamine and tyrosine, respectively, and which have high oxygen affinities stemming from slow ligand off rates were compared with respect to conformational and functional properties. Ultravi...
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Enterotoxigenic colibacillosis was experimentally produced in four colostrum-deprived calves given 10(10) Escherichia coli strain 210 (serotype 09+:K30+:K99-:F41-:H-) orally and the histopathological changes compared to those seen in colostrum-fed calves infected in an earlier study with strain B44 ...
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Four avian reoviruses were orally inoculated into 1-day-old chickens to determine pathogenicity, virus persistence in the intestinal tract, and effects on body weight gains. Avian reoviruses Reo-25 and W3-492 belonged to two separate serotypes, and viruses TC 897 and W3-410 were antigenically relate...
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Two viruses, infectious salmon anaemia (ISA) virus and a novel togavirus-like virus, were isolated from ISA disease outbreaks that were first reported as a new syndrome, haemorrhagic kidney syndrome (HKS) affecting farmed Atlantic salmon Salmo salar L. on the East coast of Canada. Laboratory confirm...
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An immunofluorescent antibody test (IFAT) developed for the diagnosis for plasmacytoid leukemia was evaluated against histology under field conditions. Previously published results from a laboratory evaluation indicated that the IFAT had a much higher sensitivity than did histology. One hundred seve...
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A field trial to evaluate a whole cell vaccine for the prevention of caseous lymphadenitis (CLA) in sheep and goats was performed in one goat herd and one sheep flock over a period of three years. In goats, there was a nonstatistically significant trend for fewer cases of CLA in the vaccinated anima...
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A report is given of the discovery in New Brunswick in May 1996 of a dead St. Lawrence beluga aged >=34 years and in the latter stages of lactation. It indicates that some old females in this population remain reproducibly active..
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The general objective of this study was to evaluate a crude Ostertagia ostertagi antigen enzyme-linked immunosorbent assay (ELISA) for monitoring gastrointestinal parasites in lactating dairy cattle. A longitudinal study of gastrointestinal parasites in lactating dairy cows was carried out in 38 her...
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In order to describe the farm-level Salmonella status, 113 Ontario swine farms were tested for Salmonella one to five times within the time period 2001-2006. During 422 visits, 6844 fecal samples were collected and cultured for Salmonella. Salmonella was recovered from 437 (6.38%) of the fecal sampl...
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A microbiological assay was developed to quantify the concentrations of the quinolone antibiotics sarafloxacin and oxolinic acid in Atlantic salmon (Salmo salar) plasma. The assay was a modification of the Association of Official Analytical Chemists (AOAC) method for antibiotic concentrations in fee...
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A method used to calculate the number of P. haemolytica reaching the lungs of calves during an aerosol exposure is described. This method is based on a linear relationship of bacterial deposition in lungs of mice and calves when exposed to the same bacterial aerosol.
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Newcastle disease virus (NDV) and avian pneumovirus (APV) cause Newcastle disease and rhinotracheitis respectively, in turkeys. Both of these viruses infect the respiratory system. A one-tube, multiplex, reverse transcription-polymerase chain reaction (RT-PCR) assay for the detection of both NDV and...