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  • Title: Seasonal development of Cyathostominae larvae on pasture in a northern temperate region of the United Kingdom.
    Author: Ramsey YH, Christley RM, Matthews JB, Hodgkinson JE, McGoldrick J, Love S.
    Journal: Vet Parasitol; 2004 Feb 06; 119(4):307-18. PubMed ID: 15154595.
    Abstract:
    A study following the development of Cyathostominae from egg to the infective larval third stage was conducted from April to December 2001 in west central Scotland. Duplicate samples (1 kg) of naturally infected faeces were placed on a 78 cm2 plot each week on a cyathostomin-free pasture. Subsamples of the grass surrounding the faecal plot were collected weekly on four occasions and the number of larvae obtained determined. Few larvae were recovered in the first week of development of individual plots, followed by a rise in the numbers of larvae in second, third and fourth weeks of development of each sample. The climatic conditions were seen to have an effect on the rate of development. Specifically, from multilevel, multivariable linear regression models it was evident that the factors associated with numbers of infective larvae recovered from pasture were the time since the faeces samples were laid down, the average temperature and rainfall during the previous week, as well as the interaction between temperature and rainfall. Conversely, from the model, the number of larvae recovered from pasture was associated with neither the number of eggs within the faeces samples placed on the plots nor with the viability of these eggs.
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