TABLE 1

Scoring system for evaluating gross lesions in the peritoneum, liver, and duodenum in chicks infected with G. anatisa

ScoreDescription
PeritoneumLiverDuodenum
InflammationAmt of exudateTransparency of peritoneumHepatomegalyNecrosisEdemaAmt of exudateMesentery hemorrhage
0NoneNoneClearNoneNoneNoneNoneNone
1LocalSparse, locallyUnclearMildLocalMildSparse, locallyMild
2LocalLarge, locallyCloudyModerateLocalModerateLarge, locallyModerate
3DiffuseSparse, diffuselyOpaqueSevereDiffuseSevereSparse, diffuselySevere
4DiffuseSparse, diffuselyOpaqueSevereDiffuseSevereSparse, diffuselySevere
5DiffuseLarge, diffuselyOpaqueSevereDiffuseSevereLarge, diffuselySevere
  • a All chicks were euthanized 2 days after the second challenge. Two individuals performed the double-blind scoring of lesions in the peritoneum, liver, and duodenum for each chick, according to the description of each score within all parameters.