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Genetic relationships of Trichostrongylus isolates from Iran and reference sequences for different species of Trichostrongylus selected from previous studies (6, 8, 20, 21). The titles with asterisk inferred from the present study. The relationships were inferred based on phylogenetic analysis of ITS2 sequence data using Bayesian Inference. Nodal support is given as a pp value. The scale bar indicates distance.
