Note 518 — Chapter XI · NATURAL IMMUNITY AGAINST TOXINS
Francis G. Binnie translation
The temporary immunity of the marmot (amongst mammals) against tetanus toxin must be considered separately. According to Billinger and Dönitz the marmot is insusceptible to this poison during its winter sleep. But once it is awakened it readily contracts tetanus. H. Meyer, Halsey and Ransom have observed the same fact in hibernating bats that have been waked up. In these cases the immunity is dependent on the low temperature which approximates these examples to that of the natural immunity of the frog against the same toxin.