'bacillogenic' originates from New Latin, specifically the word 'bacillogenicus', where 'bacillus' meant 'little rod' (Latin) and the element '-genic' (from Greek 'gen-' / 'gennan') meant 'producing'.

'bacillogenic' derives from New Latin 'bacillogenicus', built from Latin 'bacillus' (a diminutive of 'baculum', 'rod, stick') plus a Greek-derived suffix '-genic' meaning 'producing'; the modern English scientific adjective 'bacillogenic' developed directly from this formation.

Initially it meant 'producing or causing bacilli', and this technical meaning has been retained in modern usage to describe agents or conditions that generate bacilli.