I've explained that to you. The disease is transmitted by fleas. Their bodies have an eighty percent moisture content. The hot wind from the south literally burns them away.
12 seconds sound clip from the Isle of the Dead (1945) movie soundboard.
You can hear this line at 00:22:52.397 in the Blu-ray version of the movie.
Quote context
[...]
- What nonsense the old woman talks.
- It sounds no stranger to me than some of the things you've been saying.
- If the sirocco blows, all danger will be over in 24 hours.
- What's that? Some old peasant superstition. An elemental wolf-spirit. Some such thing in human form.
- They say it drains people of their strength and vitality until they die.
- Kyra will tell you that there's more to it.
[...]