#2 What is perplexing is how many cases that showed up all at once. TB reproduces slowly, and can have wildly different incubation rates before symptoms show. From two weeks to many years.
That some doctor suddenly had the idea that, "Hey, let's check this whole ward for TB" doesn't make sense, because TB is always on the watch list. If anyone shows symptoms, everyone around them is tested, and the vast majority of those exposed are *just* exposed. Their TB has not turned active.
So I am guessing that this TR-TB is either novel, to which there is little or no immune resistance in the public, and/or it is so virulent that symptoms show up after the minimum incubation period.
I believe that around 1850, about 1/4th of the people in Europe had the bacillus, though only 500 out of 100,000 developed the active disease. |