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Comparison of the relative transcription level of representative immune-related genes in the alimentary tract tissues of non-infected (A) or orally-infected (B) body and head lice and the fold-changes of transcript by infection (C). Bars with star mark (*) indicate statistical difference between body and head lice (p<0.05). Reproduced with permission from Ref. [51]. Copyright 2012 Elsevier Inc.
