Quantity of cells present in broncho-alveolar lavage fluid (BALF) 2–3 days post inoculation in calves experimentally inoculated with different doses of viable <i>C. psittaci</i> (<i>Cp</i>) and in control calves.

Med = median. Kruskal-Wallis test: P≤0.05 indicates significant differences between medians of all groups. W test: P≤0.067 indicates significant differences between two groups. Medians highlighted in bold increased (↑) or decreased (↓) significantly in comparison to controls ‘Cp inactivated’. Data of the two control groups did not differ significantly.