Table 1: TEM findings. Severity of changes in cells of respiratory epithelium of nasal cavity.

Changes/groupsIntercellular
spaces
Vacuoles in
cytoplasm
DetritusHeterophilsBacteriaActivity
goblet cells
No. of goblet cells

Group 1 + ++ + +
Group 2 + + +
Group 3 ++ +++ ++ +++ ++ +
Group 4 S +++ +++++1 +++2 ++2 +++1 + ++2 +++1
Group 4 R + ++ + ++ ++ +++ ++1 +++2

− No change; + light; ++ moderate; +++ severe; 1number of animals; S: Septicemic; R: Rhinitic.