Vincent's study on the survival of dysenteric bacilli in water shows that they die quickly in sterilized water, especially at higher temperatures. In sterilized spring water, they survive up to 16 days at 16-20°C and 7-10 days at 38°C. In an ice-chest (2-4°C), they survive 24-41 days. In contaminated water, such as Seine water, they die in 13 days at 1-4°C and 10-12 days at 16-14°C. However, in total darkness, their survival is prolonged by 4-6 days. Sunlight rapidly kills the bacilli, with destruction occurring in 2-2.5 hours in small quantities and 4-5 hours in larger quantities. The bacilli's life is short in waters with many microorganisms, especially at 15-18°C. In artificially contaminated water, dysenteric bacilli are rarely found after 2-5 days at 22-38°C or 4-7 days at 15-18°C. In water with 220 saprophytic microorganisms per c.c., they survive 9-11 days at 15-18°C, but in the ice-chest (2-4°C), they survive 23-27 days. In water with 72,000 saprophytic organisms, they survive 10-14 days at 2-4°C, and when frozen at -6°C, they survive 22 days. Vincent concludes that ice can preserve dysenteric bacilli for two months, making it a potential transmission medium. Drinking water's role in dysentery is limited by the bacilli's short persistence and rapid decrease. Therefore, bacillary dysentery should not be limited to potable water. The disease is more severe in cold countries, such as Norway and northern Russia, where bacilli survive in water sources. In tropical and subtropical regions, the bacilli's weak vitality is further limited by light and temperature. The Glasgow Pathological and Clinical Society reported a case of spastic muscle condition in a 46-year-old bank clerk, characterized by tonic spasm in the lower trunk and thighs, with no clear cause. The condition was considered a neurosis.Vincent's study on the survival of dysenteric bacilli in water shows that they die quickly in sterilized water, especially at higher temperatures. In sterilized spring water, they survive up to 16 days at 16-20°C and 7-10 days at 38°C. In an ice-chest (2-4°C), they survive 24-41 days. In contaminated water, such as Seine water, they die in 13 days at 1-4°C and 10-12 days at 16-14°C. However, in total darkness, their survival is prolonged by 4-6 days. Sunlight rapidly kills the bacilli, with destruction occurring in 2-2.5 hours in small quantities and 4-5 hours in larger quantities. The bacilli's life is short in waters with many microorganisms, especially at 15-18°C. In artificially contaminated water, dysenteric bacilli are rarely found after 2-5 days at 22-38°C or 4-7 days at 15-18°C. In water with 220 saprophytic microorganisms per c.c., they survive 9-11 days at 15-18°C, but in the ice-chest (2-4°C), they survive 23-27 days. In water with 72,000 saprophytic organisms, they survive 10-14 days at 2-4°C, and when frozen at -6°C, they survive 22 days. Vincent concludes that ice can preserve dysenteric bacilli for two months, making it a potential transmission medium. Drinking water's role in dysentery is limited by the bacilli's short persistence and rapid decrease. Therefore, bacillary dysentery should not be limited to potable water. The disease is more severe in cold countries, such as Norway and northern Russia, where bacilli survive in water sources. In tropical and subtropical regions, the bacilli's weak vitality is further limited by light and temperature. The Glasgow Pathological and Clinical Society reported a case of spastic muscle condition in a 46-year-old bank clerk, characterized by tonic spasm in the lower trunk and thighs, with no clear cause. The condition was considered a neurosis.