Fig. 4
From: West Nile virus host-vector-pathogen interactions in a colonial raptor
ELISA OD ratios according to hatching order in broods where at least one ELISA-seropositive nestling was found. The black line shows a significant mean decrease in OD ratios (i.e. increase in antibody levels) according to LME model parameter estimate. The grey areas along the y axis depict ELISA classification categories as recommended by the manufacturer. Note that the OD ratio values were jittered along the x-axis. The results show that nestlings that hatched later (i.e. closer to the time of sampling) may have higher antibody levels