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101 - 125 of 1524
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Pooled seminal plasma obtained from six bulls was tested for its immunosuppressive activities in vitro on blastogenesis of bovine lymphocytes. Lymphocyte stimulation assay and mixed lymphocyte reaction were used as test procedures. Concanavalin A and phytohemagglutinin were utilized in the lymphocyt...
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The effect of breed of chicken on infection with an arthrotropic avian reovirus (strain R2) was studied by oral or footpad inoculation of day-old chicks of the SPF light-hybrid, commercial White Leghorn egg-layer, and commercial Ross I broiler breeds, observed to 12 weeks of age. Although most inocu...
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288 mice were divided into four groups and exposed to aerosols of P. haemolytica or S. aureus in four replicates. The numbers of bacteria were determined in the trachea and lungs of mice killed 0, 2, 4, 8, 12, 24, 48 and 72 hours after exposure. Bacterial deposition was greater in lungs than in trac...
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Stunting syndrome is an enteric disease of young turkeys that results in reduced growth (stunting) of poults and impaired feed efficiency. A virus, which has been termed the stunting syndrome agent (SSA), causes stunting syndrome. In this study passive immunity was evaluated as a method of protectin...
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The prevalence of Giardia duodenalis, Cryptosporidium spp. and other intestinal parasites was determined in dogs <1 year old from Prince Edward Island, Canada. Fecal samples were collected from the local animal shelter (n=62), private veterinary clinics (n=78) and a pet store (n=69). Intestinal para...
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The development of molecular diagnostic assays with increased sensitivity compared with conventional histological techniques is highly desirable for effective management of bonamiosis in cultured oyster stocks and wild populations. A real-time TaqMan PCR assay was developed for the specific detectio...
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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...
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Topics discussed in this review include classification of viruses, virus structure, epidemiology of viral infections, cell-mediated and humoral response, viral pathogenicity, viral defences and the detection, treatment and prevention of viral diseases..
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Severe ulcerative, necrotizing bacterial dermatitis, panniculitis and myositis occurred in at least 6 Atlantic salmon cage sites in New Brunswick in 1990. Mortality was due to invasion by opportunistic bacteria, or osmotic failure due to excessive ulceration. Mortality up to 10% on individual cages ...
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Studies on the microanatomy of the mucus-rich biofilm surface of normal or damaged teleost skin tissue have been limited because conventional fixation regimes do not effectively retain mucus during tissue preparation. A non-aqueous fixation method, based on a technique devised to retain airway mucou...
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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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BACKGROUND: Evaluation of serum magnesium (Mg) concentration is becoming important in human and veterinary critical care medicine. An ion-selective electrode can measure the physiologically active ionized fraction. OBJECTIVES: The purpose of this study was to validate an ion-specific electrode analy...
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Chinook salmon Oncorhynchus tshawytscha were experimentally infected per os with Loma salmonae and held in flow-through seawater tanks at 12 to 14 degrees C. The fish exhibited 100% infection when first examined at 7 wk post initial exposure (p.e.), and by 20 wk p.e. they had completely recovered fr...
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The susceptibility of a rodent-adapted strain of Trypanosoma vivax (Leeflant strain Y58) to Berenil, Samorin and Novidium was tested in mice. When infected mice were treated on the second day of detectable parasitaemia, there was complete cure with Berenil at 10 mg/kg, Novidium at 4 mg/kg and Samori...
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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...
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Four trials were performed to evaluate the effects of water temperature on critical aspects of L. salmonae development in rainbow trout (Oncorhynchus mykiss). The permissive water temperature range in which xenomas developed was between 9 degrees C and 20 degrees C. Parasite development was arrested...
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Both histidine-tryptophan-ketoglutarate (HTK) solution and Braile miniplegia are commercially available and used with high success. The objective of this work was to compare the effects of both strategies in an animal model. Twelve pigs were divided into control, HTK, or Braile groups using a model ...
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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...
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Examination over a period of 72 hours from inoculation showed that lesions developed first in astrocytes. where nucleolar changes. the appearance of three types of inclusion bodies, virus antigen and virus particles preceded cell degeneration and virus release. Less numerous inclusions were found in...
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Electrolyte and urea levels of vitreous humor collected from bovine eyes at various times postmortem, were compared with serum levels in the same animals. Provided the vitreous humor was filtered immediately after collection, measured levels of total calcium (Ca), potassium ions (K+), sodium ions (N...
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In utero fetuses are evidently exposed to several factors that cause an interruption of the oxygen flow through the umbilical cord causing asphyxia leading to hypoxia and metabolic acidosis. These conditions are important causes of intra-partum and neonatal mortality. The main objective of this revi...
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