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340 CLINICAL NOTES.-ROYAL SOCIETY OF MEDICINE. non-dysenteric patients and found spirochætes in 56'5 per cent. of the former, and 41 0 per cent. of the latter. These results are of interest when compared with those obtained in West Africa, but it still remains to determine the prevalence of the infection in persons who have resided in temperate regions only.doi:10.1016/s0140-6736(00)79881-3 fatcat:7ondu3atxncxlfaoubmozn5zay