Figure 1

Mean maximum clinical disease score for chickens, ducks and turkeys infected with H7 LPAI virus. Clinical signs were scored as: 0 = no signs, 1 = mild to moderate respiratory signs (mild depression in ducks), 2 = moderate to severe (i.e. depressed, not eating, neurological signs), 3 = Dead. Letters denote statistical groups among species for each virus. Error bars indicate standard deviation of clinical disease scores.