Table 1.
Distribution and severity of histological lesions in heart, liver and lung stained with HE at 24 h post-infection in chickens challenged with wild-type strains and isogenic mutants
| Strain | Heart | Liver | Lung |
|---|---|---|---|
| E058 |
+++ |
+++ |
+++ |
| E058ΔchuT |
+++ |
++ |
+++ |
| E058ΔiroD |
- |
- |
- |
| E058ΔiucD |
- |
+ |
++ |
| E058ΔchuTΔiroDΔiucD |
- |
- |
- |
| U17 |
+++ |
+++ |
+++ |
| U17ΔchuT |
+++ |
+++ |
+++ |
| U17ΔiroD |
- |
- |
- |
| U17ΔiucD |
+ |
+ |
++ |
| U17ΔchuTΔiroDΔiucD | - | - | - |
HE, hematoxylin and eosin.
-, no lesions; +, mild lesions; ++, moderate lesions; +++, severe lesions.