Bacteria or Virus That Causes Disease
This page is the CodyCross answer for the clue below from Greece, Group 679, Puzzle 5 (Battle of Marathon).
Question is: Bacteria or Virus That Causes Disease
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.