Influence of Climate on Pasture Infectivity of Ovine Trichostrongyles in Dry Pastures (original) (raw)

1997, Journal of Veterinary Medicine, Series B

SummaryThe pattern of pasture contamination and the influence of some climatic factors on the development of ovine Trichostrongyles have been studied in dry pastures of Castilla‐La Mancha (central Spain) during a 3‐year period (1986–1988). The main identified genera were Ostertagia and Trichostrongylus, followed by Haemonchus, Cooperia and Nematodirus. Two peaks of pasture contamination were detected: from mid‐winter to early‐spring and from mid‐autumn to early‐winter. No significant differences in this pattern were observed during the 3 years except Haemonchus (1986–1988, P < 0.05; 1987–1988, P < 0.001). Seasons differed significantly (spring‐autumn, P < 0.05; summer‐the rest of the year, P < 0.001). The temperature was negatively correlated with the level of pasture infectivity (except for Trichostrongylus); however, the rainfall was positively correlated with pasture infectivity.

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