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To the Editor:
—Noting the pneumonic character of the plague in China and the fact that there are no dead rats, I would say that while in Siam it was my observation and knowledge that the pneumonic form of the disease was contracted from patients with the bubonic form and from rats, I have also found dead rats and dead chickens under the houses of those dead of the pneumonic form of the plague. Eleven people died in one house of the pneumonic plague. The disease was carried by infected rats which traveled from Korat, where the bubonic form prevailed, in freight trains loaded with rice, to Ban Phagi, 100 miles away, where plague in the pneumonic form broke out ten days later than at Korat. The reason the pneumonic form was not so prevalent in Siam is that the people live practically in the open air, so that personal
Braddock CS. Pneumonic Plague in China. JAMA. 1911;LVI(6):444–445. doi:10.1001/jama.1911.02560060054029
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