Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.
Fig. 6.
Air sac tissue lesion grading after experimental infection of goslings with Mycoplasma gallisepticum
| Grade | Pathological damage |
|---|---|
| 0 | Air sacs appear thin and translucent |
| 1 | Air sacs show slight thickening with sparse grey or a few yellow pinpoint exudates |
| 2 | Foamy fluid is visible within the air sacs; partial thickening and the presence of grey or yellow exudates are observed |
| 3 | Numerous yellow-white caseous exudates are visible, with considerable thickening in most air sacs |
| 4 | Nearly the entire air sac is filled with yellow-white caseous exudates and is severely thickened |
Clinical outcomes of experimental infection of goslings with a Mycoplasma gallisepticum strain previously isolated from geese (Group A, n = 10) or with a strain previously isolated from chickens (Group B, n = 10)_ Uninfected controls made up Group C (n = 10)
| Group | Number of morbidities | Number of deaths | qPCR positivity rate (%) |
|---|---|---|---|
| A | 9 | 2 | 100 |
| B | 8 | 0 | 80 |
| C | 0 | 0 | 0 |
Distribution of pathological grades of air-sac tissue after experimental infection of goslings with a Mycoplasma gallisepticum strain previously isolated from geese (Group A, n = 10) or with a strain previously isolated from chickens (Group B, n = 10)_ Uninfected controls made up Group C (n = 10)
| Group | Gosling | Mean | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||
| A | 1 | 3 | 2 | 3 | 2 | 2 | 1 | 3 | 3 | 3 | 2.3 |
| B | 2 | 1 | 3 | 3 | 2 | 2 | 1 | 1 | 2 | 1 | 1.9 |
| C | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |