Distribution of ILTV DNA in the tissues of infected chickens at different days post infection.

Notes: Ten-week-old SPF chickens were inoculated intratracheally with 104 EID50 of ILTV strain LJS09. The tissues with positive detection rates of less than 100% in ILTV real-time PCR were underlined ; the tissues from the control group were all negative (not shown);a: I = infection group;b: C = contact exposure group;c: -/- means that the DNA were not detected at that time point.