Noun. 1. pathogen-any disease-producing agent (especially a virus or bacterium or other microorganism). microorganism, micro-organism-any organism of microscopic size. infectious agent, infective agent-an agent capable of producing infection.Translations.. pathogen-any disease-producing agent (especially a virus or bacterium or other microorganism). microorganism, micro-organism-any organism of microscopic size.
Timber porch detail. A covered porch. A porch (from Old French porche, from Latin porticus colonnade, from porta passage) is a construction usually external to the walls of the main building proper, but may be enclosed by latticework, broad windows, screen, or other light frame walls extending from the main structure.
Inside view of the porch. The porch offers a nearly unobstructed view of the outdoors. A screen porch is a big improvement, but it's also a big project, one that might consume most of your spare time this summer. So, we're keeping this porch design simple.