A Disease-Causing Organism

This page is the CodyCross answer for the clue below from Space Exploration, Group 916, Puzzle 4 (Infrared Light).

Question is: A Disease-Causing Organism

and the answer is: PATHOGEN

Word Meaning:

PATHOGEN — (pathology, immunology) An agent that can cause disease, especially an infectious microorganism, such as a bacterium, virus, protozoon or fungus.

Definitions from Wiktionary.