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Fig. 1 | BMC Veterinary Research

Fig. 1

From: Virulence of three European highly pathogenic H7N1 and H7N7 avian influenza viruses in Pekin and Muscovy ducks

Fig. 1

Pathogenicity index, survival rate and seroconversion in Muscovy and Pekin ducks after challenge with H7 viruses. Shown are the average clinical scores for each group. All birds were observed for 10 days and clinically scored according to the OIE recommendations as 0 (healthy), 1 (sick), 2 (severely sick) or 3 (dead) and the pathogenicity index (PI) was calculated as a scale from 0 (avirulent) to 3 (highly virulent). The PI, shown as numbers, was calculated by dividing the sum of the arithmetic mean values of daily scores by 10 (the number of observation days). Dead birds were score 3 until the end of the experiment according to the OIE recommendations (a). Survival rate in each group showing the daily mortality of ducks after infection (b) and antibody titers at the end of experiment using ELISA (expressed as mean ± standard deviation) (c)

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BMC Veterinary Research

ISSN: 1746-6148

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