Temporal interrelations of bacteria based on the occurrence time

In this paper, for two different bacteria a and b, we introduce a temporal interrelation a <; b from a to b satisfying that the starting time of a is precedent to one of b. Also we introduce a sliding temporal interrelation satisfying that the ending time of a is precedent to one of b, and a non-overlapping temporal interrelation satisfying that the ending time of a is precedent to the starting time of b. Then, we extract such temporal interrelations from bacterial culture data provided from Osaka Prefectural General Medical Center in years from 2001 to 2007.