aetiogenic
[ˌiːtɪəˈdʒɛnɪk]
Definitions
1. adjective
relating to or causing the origin of a disease or condition
“The aetiogenic factors of the outbreak were carefully analyzed by public health officials.”
2. noun
a factor that is the origin of a disease or condition
“The aetiogenic agent in this case was a virus that had mutated from a common flu strain.”