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  1. Article ; Online: Comparison of diagnostic methods for assessment of Ostertagia ostertagi exposure in Norwegian dairy herds

    Tonje Opsal / Ingrid Toftaker / Lucy Robertson / Ian Woolsey / Lisbeth Hektoen

    Acta Veterinaria Scandinavica, Vol 65, Iss 1, Pp 1-

    2023  Volume 10

    Abstract: Abstract Background The gastrointestinal nematode (GIN) Ostertagia ostertagi can cause severe disease in first season grazers (FSG) and impaired performance due to subclinical infections in adult cows. Diagnostic methods to assess exposure include faecal ...

    Abstract Abstract Background The gastrointestinal nematode (GIN) Ostertagia ostertagi can cause severe disease in first season grazers (FSG) and impaired performance due to subclinical infections in adult cows. Diagnostic methods to assess exposure include faecal egg count and detection of specific antibodies using antibody-ELISAs resulting in an optical density ratio (ODR). Using the ELISA test on bulk tank milk (BTM) allows for a herd level diagnosis. Appropriate use of diagnostic methods for evaluation of O. ostertagi exposure is required to optimize herd parasite surveillance and aid in a sustainable control regime. The aim of this study was to describe the relationship between different diagnostic tests used to assess GIN exposure in Norwegian production systems. A cross-sectional field study was carried out in twenty herds in Norway in the fall of 2020. Serum and faecal samples were taken from 380 individuals, of which 181 were FSG and 199 were cows. In addition, milk was collected from every cow and one BTM sample was taken from each herd. Faecal egg counts were performed. The distribution of ODR values in individual samples within and between herds and the associations between BTM ODR and individual ODR values were described. The data were analysed using visual assessment of scatter plots, Pearson correlation coefficients and linear regression. Results A high variability of the within-herd individual ODR values in serum and milk in every herd was detected. The ODR in BTM explained a low degree of the variation in the individual serum and milk samples. When plotting the ODR results in milk or serum according to four BTM categories, the distribution of ODR values were notably different in the highest and lowest BTM categories. The correlation between individual milk and serum samples was moderate (r = 0.68), while the highest correlation (r = 0.81) was between the BTM ODR and the group average individual milk samples. Conclusions A poor predictive ability for BTM ODR to assess individual ODR values in both FSG and ...
    Keywords Antibody level ; Bulk tank milk ; ELISA ; Gastrointestinal nematodes ; Optical density rate ; Pasture parasites ; Veterinary medicine ; SF600-1100
    Subject code 630
    Language English
    Publishing date 2023-11-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: ERS International Congress 2021

    Lucy Robertson / Filipa Machado / Sebastian Rutkowski / Liliana Silva / Sabina Miranda / Ingeborg Farver-Vestergaard / Thomas Janssens / Karl P. Sylvester / Chris Burtin / Andreja Šajnić / Joana Cruz

    ERJ Open Research, Vol 8, Iss

    highlights from the Allied Respiratory Professionals assembly

    2022  Volume 2

    Abstract: This paper provides an overview of some of the most memorable sessions that were (co)organised by the Allied Respiratory Professionals Assembly during the 2021 European Respiratory Society International Congress, which was held online for the second ... ...

    Abstract This paper provides an overview of some of the most memorable sessions that were (co)organised by the Allied Respiratory Professionals Assembly during the 2021 European Respiratory Society International Congress, which was held online for the second consecutive year due to the COVID-19 pandemic. Early Career Members from Assembly 9 summarised the content of the sessions (three oral communication sessions, two symposia and one Expert View) with the support of the chairs from the four Assembly groups: Respiratory Function Technologists and Scientists (Group 9.01); Physiotherapists (Group 9.02); Nurses (Group 9.03); and Psychologists and Behavioural Scientists (Group 9.04). The sessions covered the following topics: impact of COVID-19 on lung function and healthcare services, and the importance of quality assurance and technology in lung function assessment; diagnosis and management of sarcopenia in patients with chronic respiratory disease; maintenance of the effects of pulmonary rehabilitation; solutions outside the hospital for the management of patients with COVID-19 in need of health care; the nursing perspective during the COVID-19 pandemic; and psychological and behavioural issues in respiratory care. This highlights article provides valuable insight into the latest scientific data and emerging areas affecting clinical practice of allied respiratory professionals.
    Keywords Medicine ; R
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher European Respiratory Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Quantitative microbial risk assessment combined with hydrodynamic modelling to estimate the public health risk associated with bathing after rainfall events

    Eregno, Fasil Ejigu / Arve Heistad / Ingun Tryland / Lucy Robertson / Mette Myrmel / Torulv Tjomsland

    Science of the total environment. 2016 Apr. 01, v. 548-549

    2016  

    Abstract: This study investigated the public health risk from exposure to infectious microorganisms at Sandvika recreational beaches, Norway and dose–response relationships by combining hydrodynamic modelling with Quantitative Microbial Risk Assessment (QMRA). ... ...

    Abstract This study investigated the public health risk from exposure to infectious microorganisms at Sandvika recreational beaches, Norway and dose–response relationships by combining hydrodynamic modelling with Quantitative Microbial Risk Assessment (QMRA). Meteorological and hydrological data were collected to produce a calibrated hydrodynamic model using Escherichia coli as an indicator of faecal contamination. Based on average concentrations of reference pathogens (norovirus, Campylobacter, Salmonella, Giardia and Cryptosporidium) relative to E. coli in Norwegian sewage from previous studies, the hydrodynamic model was used for simulating the concentrations of pathogens at the local beaches during and after a heavy rainfall event, using three different decay rates. The simulated concentrations were used as input for QMRA and the public health risk was estimated as probability of infection from a single exposure of bathers during the three consecutive days after the rainfall event. The level of risk on the first day after the rainfall event was acceptable for the bacterial and parasitic reference pathogens, but high for the viral reference pathogen at all beaches, and severe at Kalvøya-small and Kalvøya-big beaches, supporting the advice of avoiding swimming in the day(s) after heavy rainfall. The study demonstrates the potential of combining discharge-based hydrodynamic modelling with QMRA in the context of bathing water as a tool to evaluate public health risk and support beach management decisions.
    Keywords beaches ; Campylobacter ; coastal zone management ; Cryptosporidium ; Escherichia coli ; Giardia ; hydrologic data ; hydrologic models ; microbiological risk assessment ; microorganisms ; Norovirus ; pathogens ; public health ; rain ; risk ; Salmonella ; sewage ; swimming ; Norway
    Language English
    Dates of publication 2016-0401
    Size p. 270-279.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2016.01.034
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
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  4. Article: Inactivation of parasite transmission stages: Efficacy of treatments on food of animal origin

    Franssen, Frits / Anamaria Cozma-Petruţ / Anet Režek Jambrak / Cédric Gerard / David Rodriguez-Lazaro / Kristoffer Tysnes / Lucy Robertson / Madalena Vieira-Pinto / Miroslaw Rozycki / Neil Rowan / Peter Paulsen

    Trends in food science & technology. 2019 Jan., v. 83

    2019  

    Abstract: One third of parasitic outbreaks with known source in the US are attributable to food of animal origin (FoAO). Among 24 foodborne parasites ranked by FAO/WHO, 14 are associated with FoAO. Management of these biological hazards is essential for food ... ...

    Abstract One third of parasitic outbreaks with known source in the US are attributable to food of animal origin (FoAO). Among 24 foodborne parasites ranked by FAO/WHO, 14 are associated with FoAO. Management of these biological hazards is essential for food safety.Control measures to inactivate the 12 most relevant parasites in FoAO are evaluated, including cooking, freezing, curing, and traditionally applied food-processing techniques, as well as high-pressure treatment and irradiation.How inactivation is determined may affect results, however efficacy of freezing and heating depends on parasite species and developmental stage, as well as temperature and time conditions. Cooking at core temperature 60–75 °C for 15–30 min inactivates parasites in most matrices. Freezing at −21 °C for 1–7 days generally inactivates parasites in FoAO, but cannot be relied upon in home situations. Parasitic stages are sensitive to 2–5% NaCl, often augmented by lowering pH. Gamma irradiation at >0.1–0.5 kGy is effective for fish parasites, except Anisakis (10 kGy); >0.4–6.5 kGy control meatborne parasites. More research is needed to investigate and improve irradiation technologies using sustainable energy sources. Literature data are diverse and insufficient to model survival as response to treatment. Research on foodborne parasites should be improved to standardize experimental approaches for evaluation of inactivation techniques and methods to monitor inactivation.
    Keywords animal-based foods ; Anisakis ; biological hazards ; cooking ; fish ; Food and Agriculture Organization ; freezing ; gamma radiation ; high pressure treatment ; irradiation ; models ; parasites ; pH ; renewable energy sources ; sodium chloride ; temperature ; World Health Organization ; United States
    Language English
    Dates of publication 2019-01
    Size p. 114-128.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1049246-x
    ISSN 1879-3053 ; 0924-2244
    ISSN (online) 1879-3053
    ISSN 0924-2244
    DOI 10.1016/j.tifs.2018.11.009
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 5184: Show issues

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