← Chapter 11
Microbiology · Chapter 11

The Big Four HAIs

Most healthcare-associated infections ride in on a device or through an incision. A plastic tube or an open wound lets microbes walk past the body's normal barriers. Meet the four that matter most. Work out the rate the way surveillance does, then check off the prevention bundle and watch what happens.

CAUTIeach closed gate is a bundle step

The route a microbe takes, and the bundle steps that block it
Tick the bundle steps on the right and watch the microbes thin out.

Work out the ratethe surveillance formula

1450
12
0.0per 1,000 catheter-days
Now add the bundle
0.0with the bundle in place
Risk left
100%
Risk removed
0%
Infections spared
0
CAUTIcatheter-associated urinary tract infection

The prevention bundleall five, every time

Steps in place 0 of 5
Each step here carries a share of the risk it removes. The shares multiply, so five partial steps together beat any one of them alone. That is why a bundle is a bundle.