Anyone who has ever heard of Ridgways disease. What exactly 3
I also searched online and in various medical databases and I found the only reference was Agatha Christie's book. I think it could be a fictitious disease for the purposes of this book.
It is an imaginary disease seen in Agatha Christie's The Love. The disease is hypothetical, but as mentioned in the book, it can be MS or multiple sclerosis, which is not a hypothetical disease.
Agatha Christie served as a volunteer nurse from 1914-1916 and qualified as a dispenser (pharmacist?) In 1917. She was very familiar with poisons and their symptoms. The description of the disease may be correct, even if the name was deliberately invented, there is no way for you to know.
The description of the effects of poisons in Christie's own book really helped to discover that they were designed so well that the symptoms could be recognized, even though the therapists were confused.