Figure 2. Mean log10 number of the 16S rRNA gene identified in upper respiratory tract samples of calves at various postnatal time points (3, 14, 28 and 35 days) and for different health statuses (healthy, pneumonia, and otitis).

Dunnett’s multiple comparison procedure was used to compare each disease status (otitis, pneumonia, and pneumonia-otitis combined) against the status “healthy” within each sample collection date. An asterisk between health statuses represents a significant difference (P < 0.05) for the age sampled.