path·o·gen 
(păthə-jən)
(păthə-jən)n.
An agent that causes disease, especially a virus, bacterium, or fungus.
- nearby
- near/close to (one's) heart
- Nearctic
- near-Earth asteroid
- near-Earth comet
- near-Earth object
- Near East
- Near Eastern
- Near Easterner
- near gale
- near-infrared radiation
- Near Islands
- nearly
- near miss
- nearness
- near point
- near-red radiation
- near rhyme
- nearshore
- nearsighted
- nearsightedly
- nearsightedness
- near-term
- near thing
- near to heart