4,748 results match your criteria: "Ontario Veterinary College[Affiliation]"

Article Synopsis
  • GDV (Gastric dilatation and volvulus) is a serious medical emergency in dogs, and this study aimed to analyze its radiographic features and how accurately different radiologists can diagnose it.
  • The study found that the sensitivity of radiographs to detect 360-GDV was relatively low (43.7%-50%), while the specificity was higher (84.6%-92.1%), indicating some challenges in accurately diagnosing this condition.
  • Key radiographic signs unique to 360-GDV included severe esophageal distension and the absence of small intestine swelling, but diagnosing it can be complicated due to similarities with other conditions like gastric dilatation (GD).
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Introduction: Predicting which species are susceptible to viruses (i.e., host range) is important for understanding and developing effective strategies to control viral outbreaks in both humans and animals.

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Article Synopsis
  • TLS is a bacteriophage that targets specific cell surface receptors, TolC and lipopolysaccharide.
  • The genome reannotation process identified 49,902 base pairs and 86 coding sequences, showing significant similarity to the T1 phage.
  • Findings indicate that TLS uses a unique DNA packaging method and classifies it within a specific family and genus based on its genome sequence.
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Although significant progress in the treatment of breast cancer has been achieved, toxic therapies would not be required if breast cancer could be prevented from developing in the first place. While breast cancer prevention is difficult to study in humans due to long disease latency and stochastic cancer development, transgenic mouse models with 100% incidence and defined mammary tumor onset, provide excellent models for tumor prevention studies. In this study, we used Neu/Erbb2 transgenic mice (MTB-TAN) as a model of human HER2 breast cancer to investigate whether a family of microRNAs, known as the miR-200 family, can prevent mammary tumor development.

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Identifying skills required of new epidemiologists: a content analysis of Canadian job postings and master's programs.

Front Public Health

October 2024

Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada.

Introduction: The rise of emerging public health threats has increased the need for qualified epidemiologists in Canada. Our study aimed to identify the knowledge, skills, and abilities (KSAs) required of epidemiologists entering the workforce and determine whether these align with those taught in graduate epidemiology programs.

Methods: An inductive content analysis of Canadian job postings from May to December 2023 containing the keyword "epidemiology" and requiring master's degrees in epidemiology or related fields was conducted to identify the KSAs required in the workforce.

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A Pressure-Based Model of IV Fluid Therapy Kinetics.

Bull Math Biol

October 2024

Department of Mathematics and Statistics, University of Guelph, 50 Stone Rd. E., Guelph, ON, N1G 2W1, Canada.

The kinetics of intravenous (IV) fluid therapy and how it affects the movement of fluids within humans and animals is an ongoing research topic. Clinical researchers have in the past used a mathematical model adopted from pharmacokinetics that attempts to mimic these kinetics. This linear model is based on the ideas that the body tries to maintain fluid levels in various compartments at some baseline targets and that fluid movement between compartments is driven by differences between the actual volumes and the targets.

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Host genetic diversity and body condition influence parasite resistance and clearance in a wild marine mammal population.

Biol Lett

October 2024

Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile.

Host genetic variability can modulate infection resistance, although its role in infection clearance remains unclear. Hookworm disease ( sp.) is the leading cause of pup mortality in several otariid species, although the parasite can be cleared through immune-mediated processes.

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Utilizing machine learning and hemagglutinin sequences to identify likely hosts of influenza H3Nx viruses.

Prev Vet Med

December 2024

Department of Population Medicine, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario, Canada; Centre for Public Health and Zoonoses, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario, Canada. Electronic address:

Influenza is a disease that represents both a public health and agricultural risk with pandemic potential. Among the subtypes of influenza A virus, H3 influenza virus can infect many avian and mammalian species and is therefore a virus of interest to human and veterinary public health. The primary goal of this study was to train and validate classifiers for the identification of the most likely host species using the hemagglutinin gene segment of H3 viruses.

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Passive sampling of microbes in various water sources: A systematic review.

Water Res

November 2024

Water, Health and Applied Microbiology Lab (WHAM Lab), Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada; Department of Civil and Environmental Engineering, Queensland University of Technology, Brisbane, Australia. Electronic address:

Traditional methods for monitoring pathogens in environmental waters have numerous drawbacks. Sampling approaches that are low-cost and time efficient that can capture temporal variation in microbial contamination are needed. Passive sampling of aquatic environments has shown promise as an alternative water monitoring technique for waterborne pathogens and microbial contaminants.

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Estimation of genetic parameters and genome-wide association study for enzootic bovine leukosis resistance in Canadian Holstein cattle.

J Dairy Sci

January 2025

Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, Ontario Agricultural College, University of Guelph, Guelph, ON N1G 2W1, Canada; Institute of Genetics, Department of Clinical Research and Veterinary Public Health, University of Bern, Bern 3001, Switzerland. Electronic address:

Bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis (hereafter referred to as leukosis), frequently observed in North American dairy herds. Infection with BLV can lead to persistent lymphocytosis and tumors and is associated with decreased production, immunity. and fertility.

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Background: It is unknown if gastrointestinal dysbiosis in diarrheic calves causes disease or is a consequence of the disease.

Objectives: Describe the fecal microbiota of calves before, during, and after recovering from diarrhea.

Animals: Fifteen female Holstein calves of 0 to 21 days old from a single farm.

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mRNA Vaccination: An Outlook on Innate Sensing and Adaptive Immune Responses.

Viruses

September 2024

Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada.

Vaccination has led to significant dismantling of infectious diseases worldwide. Since the dawn of the SARS-CoV-2 pandemic, there has been increased popularity in the usage and study of the mRNA vaccine platform. Here, we highlight fundamental knowledge on mRNA vaccine pharmacology, followed by the immunity conferred by innate sensing and adaptive responses resulting from exposure to the mRNA vaccine construct and encapsulation materials.

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The main goals of this study were to document and compare the normal ranges of testicular haemodynamic parameters in pre- (aged 8-12 months; n = 4) and postpubertal (aged 24-259 months; n = 16) Miranda donkeys in the breeding season, and to correlate animal biometric data and testicular Doppler indices with basic semen quality parameters of sexually mature jacks. Colour and pulsed-Doppler ultrasonography were employed to assess blood flow in the left and right distal supratesticular artery (DsTA) and their marginal branches (marginal arteries-MA). Peak systolic velocity (PSV), end diastolic velocity (EDV), pulsatility index (PI) and resistive index (RI) were evaluated in both blood vessels, and TAMV (time-averaged mean velocity), TABF (total arterial blood flow) and TABF rate (TABF-R) were calculated for MA.

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This paper is derived from a presentation given by the first author at the 2024 Symposium for the Calvin Schwabe Award, presented to Dr. Jan Sargeant for Lifetime Achievement in Veterinary Epidemiology and Preventive Medicine. Researchers must work toward ensuring validity throughout the research process, but we also should ensure that our resulting outcomes are specified to appropriately inform and enable decision-making by the end-users.

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Transmission dynamics of ESBL/AmpC and carbapenemase-producing Enterobacterales between companion animals and humans.

Front Microbiol

September 2024

CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal.

Article Synopsis
  • Antimicrobial resistance, particularly from ESBL- and AmpC-producing Enterobacterales, is rising in companion animals, posing a health threat to humans in contact with these animals.
  • A study in Portugal and the UK examined the transfer of these resistant strains between infected pets and their owners through fecal samples and nasal swabs.
  • The findings showed significant rates of resistant bacteria in both animals and humans, with evidence of transmission in multiple households, underscoring the need for better antimicrobial surveillance and public health strategies.
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Feline respiratory disease complex: insights into the role of viral and bacterial co-infections.

Front Microbiol

September 2024

Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States.

Feline respiratory disease complex (FRDC) is a highly prevalent syndrome in cats that often result in fatal outcomes. FRDC etiology is complex, and often, multiple viral and bacterial pathogens are simultaneously associated with disease causation. There is limited information about the role of co-infections in pathogenesis and the current prevalence of pathogens in North America.

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Endothelial glycocalyx degradation in critically ill foals.

J Vet Intern Med

September 2024

Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA.

Background: Endothelial glycocalyx (EG) degradation occurs in septic humans and EG products can be used as biomarkers of endothelial injury. Information about EG biomarkers and their association with disease severity is lacking in hospitalized foals.

Objectives: Measure serum syndecan-1 (SDC-1), heparan sulfate (HS), angiopoietin-2 (ANG-2), aldosterone (ALD), and plasma atrial natriuretic peptide (ANP) concentrations and to determine their association with disease severity and death in hospitalized foals.

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Factors Associated with Medication Noncompliance in Dogs in New Zealand.

Animals (Basel)

September 2024

School of Veterinary Science, Massey University, Palmerston North 4442, New Zealand.

Client compliance with prescribed medication instructions to treat their pets is a concern. This study describes factors associated with the noncompliance of dog owners with veterinary recommendations for medication, as well as client-reported barriers and aids to administering medications. A cross-sectional survey of dog owners' compliance with veterinary medication recommendations was performed from 9 January 2019 to 18 July 2020.

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The indicator amino acid oxidation (IAAO) method has been used to determine metabolic availability (MA) of amino acids in feedstuffs for pigs, humans, and preliminarily for cats. Peas are a commonly used protein source in grain-free extruded dog diets. However, peas have a poor sulfur amino acid (AA) ratio (methionine [Met]:cysteine) with Met being the first limiting AA.

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Cattle produce Abs with an H chain ultralong CDR3 (40-70 aa). These Abs have been shown to have features such as broad neutralization of viruses and are investigated as human therapeutics. A common issue in sequencing the bovine BCR repertoire is the sequence length required to capture variable (V) and isotype gene information.

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Objective: To report local progression and survival in dogs following surgery and postoperative definitive radiotherapy (dRT) for management of soft tissue sarcoma (STS) and to evaluate risk factors for local progression and survival.

Methods: Records were retrospectively reviewed at 9 referral hospitals for dogs managed with postoperative dRT between January 1, 2010, and January 1, 2020, following surgery for STS. Data related to presentation, surgery, dRT, systemic therapy, and outcome were abstracted.

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In humans and mice, the induction of interleukin (IL)-17 expression enhances epithelial barrier integrity through the secretion of antimicrobial peptides (AMP), thereby improving antibacterial defense. However, it is unclear whether IL-17 has similar antibacterial effects in chickens by modulating the expression of AMPs, such as avian beta-defensins (also known as gallinacins) and cathelicidins. This study evaluated the in vivo effects of inoculating 20-day-old broiler chickens with two doses of a plasmid encoding chicken IL-17 (pCDNA3.

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Development of an ic-CLEIA for precise detection of 3-CQA in herbs and patent medicines: ensuring quality control and therapeutic efficacy.

Front Nutr

August 2024

Chinese-German Joint Institute for Natural Product Research, Shaanxi International Cooperation Demonstration Base, Shaanxi University of Technology, Hanzhong, China.

Background: 3-caffeoylquinic acid (3-CQA), a member of the chlorogenic acid family, possesses diverse pharmacological properties, such as scavenging, antioxidant, and antiapoptotic activity, rendering substantial value to alimentary consumables and therapeutic substances. However, the pervasiveness of non-standard practices, notably the misuse and abuse of indigenous botanicals, coupled with the inherent susceptibility of 3-CQA to degradation under light and heat exposure, engenders discernible disparateness in the quality profiles of the same kinds of herbs. Consequently, precise quantification of 3-CQA becomes imperative.

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