Fig. 2.

Oropharyngeal excretion of LPAIV A/chicken/Mexico/2007 from experimentally infected chickens and ducks. Oropharyngeal swabs obtained from eight ducks (○) and four chickens (●) that were infected with 10⁷ EID₅₀ LPAIV A/chicken/Mexico/2007 (H5N2) via nasal, oropharyngeal, and ocular routes were analyzed by RRT-PCR using matrix gene primers. RRT-PCR was performed on pooled samples (two birds per group). Ct values for viral RNA extracted from the swabs were converted into EID₅₀/mL values by interpolation. Data for both groups are shown. The solid lines represent average EID₅₀/mL values measured at each time point shown.