Table 1.
Clinical presentation of congenital vestibular disease in 13 Sumatran tiger cubs and one Sumatran tiger hybrid.
| Identification | Sex | Signs first recorded (days) | Age of resolution (months) | Mentation | Head tilt | Abnormal nystagmus | Vestibulo-ocular reflex | Strabismus | Reduced menace response | Circling | Cervical ventroflexion | Ataxia | Falling or rolling |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | M | 15 | 6 | N | L | − | NA | +a | NA | − | NA | + | NA |
| 2 | F | 46 | 7 | Dull | L | − | NA | +a | + | − | NA | + | NA |
| 3 | M | 46 | 5 | N | R | − | NA | − | − | − | NA | + | NA |
| 4 | M | 1 | 10 | N | L | − | + | +a | + | + | + | + | + |
| 5 | F | 1 | 10 | N | ALT | − | + | +a | + | + | + | + | + |
| 6 | M | 1 | 11 | N | ALT | − | + | +a | + | + | + | + | + |
| 7 | M | 60 | 6 | Dull | ALT | + | NA | + | NA | + | NA | + | + |
| 8 | F | 32 | 24 | N | L | − | NA | + | − | + | + | + | + |
| 9 | M | 32 | − | N | R | − | − | + | − | + | + | + | + |
| 10 | F | 60 | 6 | Dull | ALT | + | NA | + | NA | + | NA | + | + |
| 11 | F | 13 | 3 | N | ALT | − | + | +a | − | + | NA | + | + |
| 12 | M | 7 | 3 | Dull | L | − | + | − | + | + | − | − | − |
| 13 | F | 10 | 3 | Dull | L | − | + | + | + | + | + | − | + |
| 14 | M | 30 | − | Dull | R | + | NA | − | NA | + | − | + | + |
a
Strabismus was noted specifically to be positional in these cases. Further information was not available for the other cases in which strabismus was noted. N, normal; L, left; R, right; +, present; −, absent; NA, not assessed; ALT, alternating.