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Prevalence and intensity of Opisthorchis viverrini infection in different size classes of Cyclocheilichthys armatus, Hampala dispar, and Puntius brevis in Khammouane Province, Lao PDR (black bars), and Mukdahan Province, Thailand (white bars). Bar graph shows the prevalence (%) of infected fish and line graph shows the geometric mean intensity of metacercaria in size class.
