Efficacy of a Recombinant Turkey Herpesvirus AI (H5) Vaccine in Preventing Transmission of Heterologous Highly Pathogenic H5N8 Clade 2.3.4.4b Challenge Virus in Commercial Broilers and Layer Pullets

Figure 6

Oronasal and cloacal shedding by layers. AIV load of swab samples measured by qRRT-PCR is presented as log₁₀ELD₅₀/ml in the scatterplot; horizontal bars represent group mean value for each date. For calculation of mean, negative samples were given a value of 1.5 log₁₀ ELD₅₀/ml. Contact challenged groups (G3-VC and G4-SC) were comingled with the direct-challenged groups (G3-VCh and G4-SCh) from 8 hours postchallenge. Sampling date refers to the time after direct challenge.