Basic Study
Copyright ©The Author(s) 2016.
World J Virol. Aug 12, 2016; 5(3): 125-134
Published online Aug 12, 2016. doi: 10.5501/wjv.v5.i3.125
Table 4 Pathogenicity index based on clinical scoring and necropsy of kidney and trachea of specific pathogen free chicks infected at one-day-old with infectious bronchitis viruses with examining survivors and dead birds during 14 d observation
GroupIBV isolates codeObservation record
Clinical score1Gross lesion score2
Pathogenicity index3Pathotyp4
DeadSurvivedMortality (%)TracheaKidney
4Negative control0/1010/1000000No