0:00
Welcome to another lecture
on this series on the human microbiome.
I'm Pat Cleary.
I'm a Professor of Microbiology
at the University of Minnesota.
I've spent many years
working on the pathogenesis
of group A Streptococcus.
You'll notice in my title
that I have a subtitle "Yin & Yang
of Infectious Disease".
This is a special interest of mine
because there are many bacteria
which are members of the microflora,
cause no problems at the time,
but have the potential
to also cause very serious infections
and are considered primary pathogens.
Those same pathogens can also
revert back to being normal flora.
0:44
As I'm sure you've learned already
from some of the other lectures,
our bodies are gardens
of microorganisms.
Some see the sun,
they're on our skin.
Some line the dark passages,
such as our intestines.
While others are just
transient visitors.
