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Fold changes in constitutive mRNA transcript levels of ABC transporter genes in Cooperia oncophora eggs (A) L3 (B) and adult worms (C). The transcript levels in susceptible stages have been set at 1 and the transcript levels±s.d. in CoIVR08 eggs, L3 and adult worms expressed relative to this. Changes of a minimum 2-fold with P<0·05 were regarded as being statistically significant (* P<0·05, ** P<0·01).
