1964 年 5 巻 3 号 p. 206-210
Vibrio parahaemolyticus was isolated from night soil. The night soil was collected from Japanese lavatory (Kumitori-Benjo) in Gifu-shi by honey car.
Relation between the percentage of the strain isolated and the number of patients suffered from Vibrio parahaemolyticus was shown in Fig. 1. Because the night soil was laied by for ca. 20 days in lavatory jar, so the close relation is observed among them.
The experiment showed the hypothesis about the biocycle of Vibrio parahaemolyticus in nature as follows:
Patients suffered from Vibrio parahaemolyticus→faeces contaminated by the microorganismus→collection the contaminated night soil by car→faUing out the night soil to sea water by ship→contamination of the sea water and the subsoil→contamination of the fishes in sea water→man who eat the fishes→Patients→ (upper cycle).