Spores are reproductive parts of certain organisms, such as fungi
or mosses. Although they come in many different sizes, shapes, and colors, most
spores are visible only by looking at them with a microscope.
Spores are similar to seeds because when a single spore is in the
right environment, it can grow into an larger organism, which can then produce
millions of spores. This cycle can continue as long as conditions support
Spores vary in size, shape, and color. Some are so small that when
they are airborne, a person can easily breathe them in. Spores may then lodge
in a part of the respiratory system, such as the airway or lungs, and reproduce
rapidly. Some people can develop an allergic reaction to spores, such as to
those of common household molds.
E. Gregory Thompson, MD - Internal Medicine & W. David Colby IV, MSc, MD, FRCPC - Infectious Disease