FIG 6.

Quantification of infectious bronchitis virus (IBV), expressed as log REU of RNA, in trachea and kidney measured by real-time RT-PCR after 5 dpc from chickens experimentally challenged at 28 days of age with Q1 strain of IBV (n = 10 per group). The chickens were previously vaccinated with live H120 alone (group I) or in combination with CR88 (group II) at day 1. The two groups were again vaccinated with CR88 at 14 days of age. One group (group III) was kept as a control and received sterile water. Significant differences between the groups were detected by Kruskal-Wallis test followed by Dunn's mean test and are indicated with different letters (P < 0.05).