Aligned bipartite episodes between the genera of bacteria

An aligned bipartite episode between the genera of bacteria is of the form A → B, where A and B are the sets of genera of bacteria, satisfying that every genus in A has the same earliest occurrence time, every genus in B has the same earliest occurrence time, and the former is precedent to the latter. In this paper, we extract such aligned bipartite episodes from bacterial culture data provided from Osaka Prefectural General Medical Center in years from 1999 to 2007.