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Mean titers (qPCR, Roche Light Cycler 480, standard 2nd derivative method) of M. haemolytica DNA copies (with standard deviations) in respiratory post-mortem tissues of calves not treated (
), treated with 2 mg/kg marbofloxacin at 4 h after inclusion (E2, 
), or 2 mg/kg (L2, 
), or 10 mg/kg (L10, 
) marbofloxacin at 36 h after inclusion. Significant differences are shown in the table: *p < 0.05; **p < 0.01.
