True relapsing fever arising from a focus in California seems important enough to warrant the reporting of two cases.
Prior to the announcement of Obermeier in 1873 that relapsing fever was a spirochetosis, a number of cases had been reported throughout the Eastern states, as well as an epidemic among the Chinese population of Oroville, Calif., in 1874. These cases were frequently associated with typhus, and no absolute diagnosis could be made. Since the demonstration of the spirochete, however, the number of proved cases in the United States has been very few, and with the exception of the Colorado instances, all limited to direct importations. Those of Ward1 and of Tuttle2 were in Armenians. Carlisle's3 first patient was a ship's steward from eastern tropical America, and his second case resulted from a laboratory infection from the first. Hunter and Cope4 reported a case in a man