 | Mel Blanc als Pvt. Snafu / Malaria Mike / Tree (voice) (uncredited) |
 | Billy Bletcher als Malaria Mike (voice) (uncredited) |
| Chuck Jones | Director |
| Dr. Seuss | Writer |
| Leon Schlesinger | Producer |
| Carl W. Stalling | Original Music Composer |
| Dr. Seuss | Supervising Producer |
| Treg Brown | Editor |
