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    Implications of between-isolate variation for climate change impact modelling of Haemonchus contortus populations (2016)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Rose Vineer, H
    Steiner, J
    Knapp-Lawitzke, F (WE 13)
    Bull, K
    von Son-de Fernex, E
    Bosco, A
    Hertzberg, H
    Demeler, J (WE 13)
    Rinaldi, L
    Morrison, A A
    Skuce, P
    Bartley, D J
    Morgan, E R
    Forschungsprojekt
    7. FP der EU: Innovative and sustainable strategies to mitigate the impact of global change on helminth infections in ruminants
    Quelle
    Veterinary Parasitology; 229 — S. 144–149
    ISSN: 0304-4017
    Verweise
    DOI: 10.1016/j.vetpar.2016.10.015
    Pubmed: 27809970
    Kontakt
    Institut für Parasitologie und Tropenveterinärmedizin

    Robert-von-Ostertag-Str. 7-13
    Gebäude 35, 22, 23
    14163 Berlin
    Tel.+49 30 838 62310 Fax.+49 30 838 62323
    email:parasitologie@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    The impact of climate change on parasites and parasitic diseases is a growing concern and numerous empirical and mechanistic models have been developed to predict climate-driven spatial and temporal changes in the distribution of parasites and disease risk. Variation in parasite phenotype and life-history traits between isolates could undermine the application of such models at broad spatial scales. Seasonal variation in the transmission of the haematophagous gastrointestinal nematode Haemonchus contortus, one of the most pathogenic helminth species infecting sheep and goats worldwide, is primarily determined by the impact of environmental conditions on the free-living stages. To evaluate variability in the development success and mortality of the free-living stages of H. contortus and the impact of this variability on future climate impact modelling, three isolates of diverse origin were cultured at a range of temperatures between 15°C and 37°C to determine their development success compared with simulations using the GLOWORM-FL H. contortus model. No significant difference was observed in the developmental success of the three isolates of H. contortus tested, nor between isolates and model simulations. However, development success of all isolates at 37°C was lower than predicted by the model, suggesting the potential for overestimation of transmission risk at higher temperatures, such as those predicted under some scenarios of climate change. Recommendations are made for future climate impact modelling of gastrointestinal nematodes.