Publications by authors named "Richard Mellanby"

Objective: To determine the association between ionized calcium (iCa) and/or total magnesium (tMg) and the development of sepsis and to investigate whether iCa or tMg is associated with mortality in puppies with canine parvoviral enteritis (CPE).

Methods: 64 client-owned puppies with CPE were enrolled in this prospective cohort study. Serum iCa and tMg were measured daily from admission until death or discharge.

View Article and Find Full Text PDF
Article Synopsis
  • Canine babesiosis and ehrlichiosis are significant tick-borne diseases in South Africa, but Theileriosis is not well understood, and co-infections are common among dogs in the region.
  • The study aimed to assess the prevalence of co-infections with Ehrlichia canis or Theileria equi in dogs suffering from babesiosis in the Eastern Cape province, using data from 150 infected dogs over nearly a year.
  • Results showed that while Babesia rossi was present in almost all samples, co-infection with E. canis was only found in 2.0% of cases, and no significant associations were found between various dog characteristics or blood measures and co-infection.
View Article and Find Full Text PDF

Background: Pancreatitis is an important cause of disease and death in dogs. Available circulating biomarkers are not sufficiently sensitive and specific for a definitive diagnosis.

Hypothesis: Circulating microRNAs would be differentially expressed in dogs with chronic pancreatitis and could have potential as diagnostic biomarkers.

View Article and Find Full Text PDF
Article Synopsis
  • Low-pass whole-genome sequencing and imputation can significantly reduce costs in genomic studies, especially in livestock and potentially in companion animal breeding, like dogs.
  • In a study with 30 Labrador retrievers, DNA was sequenced at different coverage levels, and the results showed that lower coverage maintained reasonably high accuracy for genotype convergence, particularly at higher depths.
  • The research suggests that saliva samples can be effectively used for whole-genome sequencing in dogs, indicating this method can facilitate genetic assessments in a practical and cost-efficient way.
View Article and Find Full Text PDF
Article Synopsis
  • Despite efforts to eliminate rabies, it remains a significant issue in the Philippines, particularly in Oriental Mindoro Province, where dog vaccination and surveillance are insufficient.
  • The Integrated Bite Case Management (IBCM) approach over three years showed high demand for post-exposure prophylaxis (PEP), yet many patients were not at high risk, and traditional surveillance missed the majority of rabies cases.
  • The study estimated that PEP prevents 20 to 43 human deaths annually at a substantial cost, revealing that improvements are needed in rabies prevention and control strategies to better address the ongoing problem.
View Article and Find Full Text PDF
Article Synopsis
  • * It investigates a novel adjuvant system called calcium phosphate-coated microcrystals (CaP-PCMCs) that enhances specific antibody responses in vaccines, particularly in animal models.
  • * The research reveals that CaP-PCMCs induce a specific type of cell death (pyroptosis) in certain immune cells, which may help explain how these microcrystals work to enhance vaccine effectiveness.
View Article and Find Full Text PDF

Antimicrobial resistance is a major threat to human and animal health. There is an urgent need to ensure that antimicrobials are used appropriately to limit the emergence and impact of resistance. In the human and veterinary healthcare setting, traditional culture and antimicrobial sensitivity testing typically requires 48-72 h to identify appropriate antibiotics for treatment.

View Article and Find Full Text PDF

Background: Genome-wide association studies (GWAS) aim at identifying genomic regions involved in phenotype expression, but identifying causative variants is difficult. Pig Combined Annotation Dependent Depletion (pCADD) scores provide a measure of the predicted consequences of genetic variants. Incorporating pCADD into the GWAS pipeline may help their identification.

View Article and Find Full Text PDF

India has a large, free-roaming dog population, encompassing both owned and stray dogs. Canine surgical neutering is often a central component of dog population management and rabies control initiatives. The provision of practical, surgical training opportunities remains a major challenge for veterinary educational establishments worldwide to ensure competency in this routine procedure.

View Article and Find Full Text PDF

Although immunotherapy is becoming a standard approach of human cancer treatment, only a small but critical fraction of patients responds to the therapy. It is therefore required to determine the sub-populations of patients who will respond to immunotherapies along with developing novel strategies to improve efficacy of anti-tumor immune reactions. Current development of novel immunotherapies relies heavily on mouse models of cancer.

View Article and Find Full Text PDF

As part of the 'Zero by 30' strategy to end human deaths from dog-mediated rabies by 2030, international organizations recommend a One Health framework that includes Integrated Bite Case Management (IBCM). However, little is understood about the implementation of IBCM in practice. This study aims to understand how IBCM is conceptualized, exploring how IBCM has been operationalized in different contexts, as well as barriers and facilitators to implementation.

View Article and Find Full Text PDF

Emerging evidence suggests an important role of vitamin D in the establishment and maintenance of pregnancy, and the regulation of foetal growth across mammalian species. However, the temporal changes in maternal vitamin D status throughout gestation in the pig and the relationship between maternal vitamin D status and litter characteristics of interest across gestation remain poorly understood and under-investigated. The abundance of 25(OH)D in maternal plasma was quantified by HPLC-MS/MS at gestational days (GD) 18, 30, 45, 60 and 90 (n = 5-11 gilts/GD).

View Article and Find Full Text PDF

Background: Vitamin D deficiency is common in humans and is increasingly linked to the pathogenesis of a multitude of diseases including obesity and metabolic syndrome. The biology of vitamin D in horses is poorly described; the relative contribution of the diet and skin synthesis to circulating concentrations is unclear and associations with the endocrine disease have not been explored.

Objectives: To determine the relationship between management, season and endocrine disease and vitamin D status in horses.

View Article and Find Full Text PDF

Background: Metabolic profiles differ between healthy humans and those with inflammatory bowel disease. Few studies have examined metabolic profiles in dogs with chronic enteropathy (CE).

Hypothesis: Serum metabolic profiles of dogs with CE are significantly different from those of healthy dogs.

View Article and Find Full Text PDF
Article Synopsis
  • * A retrospective analysis grouped sick cats by their serum alanine aminotransferase (ALT) levels, revealing significantly higher miR-122 concentrations in those with abnormal ALT activity.
  • * Findings suggest that miR-122 could serve as a reliable biomarker for liver damage in cats, warranting further research to assess its effectiveness compared to existing diagnostic methods.
View Article and Find Full Text PDF

Rabies is a neglected zoonotic disease that causes around 59,000 deaths per year globally. In Africa, rabies virus is mostly maintained in populations of free-roaming domestic dogs (FRDD) that are predominantly owned. Characterizing the roaming behavior of FRDD can provide relevant information to understand disease spread and inform prevention and control interventions.

View Article and Find Full Text PDF

Background: Metabolic profiling identifies seasonal variance of serum metabolites in humans. Despite the presence of seasonal disease patterns, no studies have assessed whether serum metabolites vary seasonally in dogs.

Hypothesis: There is seasonal variation in the serum metabolite profiles of healthy dogs.

View Article and Find Full Text PDF

Vitamin D has a well-established role in skeletal health and is increasingly linked to chronic disease and mortality in humans and companion animals. Despite the clear significance of vitamin D for health and obvious implications for fitness under natural conditions, no longitudinal study has tested whether the circulating concentration of vitamin D is under natural selection in the wild. Here, we show that concentrations of dietary-derived vitamin D and endogenously produced vitamin D  metabolites are heritable and largely polygenic in a wild population of Soay sheep (Ovis aries).

View Article and Find Full Text PDF

Objectives: The steroid hormone vitamin D has roles in immunomodulation and bone health. Insufficiency is associated with susceptibility to respiratory infections. We report 25-hydroxy vitamin D (25(OH)D) measurements in hospitalised people with COVID-19 and influenza A and in survivors of critical illness to test the hypotheses that vitamin D insufficiency scales with illness severity and persists in survivors.

View Article and Find Full Text PDF

The domestic cat is one of the most popular pets in the world. It is estimated that 89-92% of domestic cats in the UK are non-pedigree Domestic shorthair (DSH), Domestic longhair (DLH), or Domestic semi-longhair cats (DSLH). Despite their popularity, little is known of the UK non-pedigree cats' population structure and breeding dynamics.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the genetic basis of backfat thickness in pigs, a key trait in pork production, using data from 275,590 pigs across eight different breeds.
  • A genome-wide association study identified 264 significant SNPs linked to backfat thickness, revealing 27 genomic regions with varying contributions to genetic variance.
  • The research highlights the polygenic nature of backfat thickness and identifies 64 candidate genes, including well-known ones like MC4R and IGF2, which are associated with fat metabolism.
View Article and Find Full Text PDF

Background: Body weight (BW) is an economically important trait in the broiler (meat-type chickens) industry. Under the assumption of polygenicity, a "large" number of genes with "small" effects is expected to control BW. To detect such effects, a large sample size is required in genome-wide association studies (GWAS).

View Article and Find Full Text PDF

Despite bone mineral density (BMD) being regularly measured in human patients, BMD studies in clinical cohorts of dogs is lacking. In order to facilitate BMD assessment and in turn better identify dogs suffering from metabolic bone disease, rapid, easy and precise computed tomography (qCT) techniques are required. In this study we aimed to assess the utility of quantitative computed tomography (qCT) bone mineral density (BMD) measurement of the canine calvarium using a semiautomated osteodensitometry software and define host factors associated with canine bone mineral density in a skeletally healthy population.

View Article and Find Full Text PDF

Objectives: Calcium is the most abundant mineral in the body and plays a critical role in a wide range of physiological processes. Low concentrations of ionised calcium, the most metabolically available form of calcium, have been linked to an increased risk of adverse clinical outcomes in dogs. Magnesium plays an important role in parathyroid hormone function.

View Article and Find Full Text PDF