A5087949638- Salmonella and Campylobacter epidemiology
- Viral gastroenteritis research and epidemiology
- Escherichia coli research studies
- Listeria monocytogenes in Food Safety
- Food Safety and Hygiene
- Animal Disease Management and Epidemiology
- Bacteriophages and microbial interactions
- Characterization and Applications of Magnetic Nanoparticles
- Microfluidic and Bio-sensing Technologies
- bioluminescence and chemiluminescence research
- Identification and Quantification in Food
- Advanced Chemical Sensor Technologies
- Spectroscopy and Chemometric Analyses
- Zoonotic diseases and public health
- Leptospirosis research and findings
- Biosensors and Analytical Detection
- Hydrology and Watershed Management Studies
- Meat and Animal Product Quality
- COVID-19 epidemiological studies
- Water Quality Monitoring Technologies
- Fecal contamination and water quality
- Genomics and Phylogenetic Studies
- Micro and Nano Robotics
- Veterinary medicine and infectious diseases
- Food Waste Reduction and Sustainability
University of Aberdeen
2015-2024
Food Standards Agency
2019
University of St Andrews
2013
Universities UK
2006
University of Leicester
2005
Robert Gordon University
1997
Science Research Laboratory
1995
Marine Scotland
1995
Ministry of Agriculture, Fisheries and Food
1989
Campylobacter species cause a high proportion of bacterial gastroenteritis cases and are significant burden on health care systems economies worldwide; however, the relative contributions various possible sources infection in humans unclear.National-scale genotyping was used to quantify importance human infection. Multilocus sequence types were determined for 5674 isolates obtained from campylobacteriosis Scotland July 2005 through September 2006 999 3417 contemporaneous samples potential...
ABSTRACT The concentration and prevalence of Escherichia coli O157 in cattle feces at the time slaughter was studied over a 9-week period from May to July 2002. Fecal samples ( n = 589) were collected rectums slaughtered cattle, animal-level rate estimated be 7.5% (95% confidence interval [CI], 5.4 9.6%) while group 40.4% CI, 27.7 53.2%). Of 44 infected animals detected, 9% high shedders that contained E. concentrations >10 4 CFU g −1 . These represented >96% total produced by all...
Abstract Anisakiasis is an emerging zoonosis caused by the fish parasitic nematode Anisakis . Spain appears to have highest reported incidence in Europe and marinated anchovies are recognised as main food vehicle. Using data on fishery landings, infection rates consumption habits of Spanish population from questionnaires, we developed a quantitative risk assessment (QRA) model for anchovy value chain. Spaniards were estimated consume average 0.66 per untreated (non-frozen) raw or meal. A...
SUMMARY The infectivity of pathogenic microorganisms is a key factor in the transmission an infectious disease susceptible population. Microbial generally estimated from dose–response studies human volunteers. This can only be done with mildly organisms. Here hierarchical Beta-Poisson model developed utilizing data outbreaks. On lowest level each outbreak modelled separately and these are then combined at second to produce group relation. distribution foodborne pathogens often shows strong...
Abstract Homologous recombination between bacterial strains is theoretically capable of preventing the separation daughter clusters, and producing cohesive clouds genotypes in sequence space. However, numerous barriers to are known. Barriers may be essential such as adaptive incompatibility, or ecological, which associated with opportunities for natural habitat. Campylobacter jejuni a gut colonizer animal species major human enteric pathogen. We demonstrate that two generalist lineages C. do...
Abstract Hybridization between distantly related organisms can facilitate rapid adaptation to novel environments, but is potentially constrained by epistatic fitness interactions among cell components. The zoonotic pathogens C ampylobacter coli and . jejuni differ from each other around 15% at the nucleotide level, corresponding an average of nearly 40 amino acids per protein‐coding gene. Using whole genome sequencing, we show that a single C. lineage, which has successfully colonized...
We present the LiSEQ (Listeria SEQuencing) project, funded by European Food Safety Agency (EFSA) to compare Listeria monocytogenes isolates collected in Union from ready-to-eat foods, compartments along food chain (e.g. food-producing animals, food-processing environments) and humans. In this article, we report molecular characterization of a selection data set employing whole-genome sequencing analysis. an overview strain diversity observed different sampled sources, characterize based on...
Nematodes of the genus Anisakis parasitize many commercial fish species and are responsible for a fish-borne zoonosis (anisakiasis) allergic reactions. can also cause consumer distrust in fishery products economic losses to industry. We review current socioeconomic, legislative, risk management human health problems caused by occurrence discuss possible strategies mitigate them. Visual inspection (and candling) as required EU legislation is not efficient parasite detection. Consequently,...
We show that a higher incidence of campylobacteriosis is found in young children (age, <5 years) living rural, compared with urban, areas. Association this difference particular animal sources was evaluated using multilocus sequence typing. This evaluation achieved by comparing Campylobacter isolates originating from these children, retail poultry, and range use source attribution phylogenetic analysis methods. The results indicate chicken major infection urban although not their rural...
Abstract Bacterial populations can display high levels of genetic structuring but the forces that influence this are incompletely understood. Here, by combining modelling approaches with multilocus sequence data for zoonotic pathogen Campylobacter, we investigated how ecological factors such as niche (host) separation relate to population structure. We analysed seven housekeeping genes from published C. jejuni and coli isolate collections a range food wild animal sources well abiotic...
The study of a hypothetical large offshore wind farm based on centralised power conversion and interconnected to the grid using multiterminal parallel high voltage direct current (HVDC) link is presented. 300 MW consists 60 squirrel-cage 5 generators connected common DC bus ten source converters (VSCs). transmission system provide variable speed generator control, therefore individual are not required for each generator, implying savings in costs. paper studies technical economical benefits...
An intensive study of 443 isolates Campylobacter jejuni and coli from 2031 fecal samples excreted by animal sources including cattle, sheep, pigs, a range wild domesticated avian species pets is described. The prevalence found in the majority ranged 22% to 28% with poultry being highest at 41% cats dogs lowest (<5%). average count for each source was not be significantly different ranging approximately 102 105 cfu/g. Multilocus sequence typing (MLST) identified phylogenies that exhibited...
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This paper introduces a novel method for sampling pathogens in natural environments. It uses fabric boot socks worn over walkers' shoes to allow the collection of composite samples large areas. Wide-area is better suited studies focusing on human exposure (e.g., recreational walking). implemented using citizen science approach: groups three walkers wearing undertook one six routes, 40 times 16 months North West (NW) and East Anglian (EA) regions England. To validate this methodology, we...
Modern agriculture has dramatically changed the distribution of animal species on Earth. Changes to host ecology have a major impact microbiota, potentially increasing risk zoonotic pathogens being transmitted humans, but intensive livestock production host-associated bacteria rarely been studied. Here, we use large isolate collections and comparative genomics techniques, linked phenotype studies, understand timescale genomic adaptations associated with proliferation most common food-born...
Journal Article Long‐term survival of Escherichia coli O157 on pasture following an outbreak associated with sheep at a scout camp Get access I.D. Ogden, Ogden Department Medical Microbiology, University Aberdeen, Aberdeen Applied Food Microbiology Group, Foresterhill, AB25 2ZD, UK (e‐mail: i.ogden@abdn.ac.uk). Search for other works by this author on: Oxford Academic Google Scholar N.F. Hepburn, Hepburn M. MacRae, MacRae N.J.C. Strachan, Strachan Plant & Soil Science, D.R. Fenlon, Fenlon...
Quantifying the transfer of Escherichia coli O157 from environment to humans is essential for understanding outbreaks, establishing infectious dose organism and proposing safeguards. We modelled pathogen loading shed onto a field by sheep immediately prior scout camp where 18 scouts two adults were infected with E. O157. estimated ingested (4–24 organisms) which in agreement low infective reported previously this food outbreaks. These data closely fit surrogate Shigella dose–response model...