Microbes are tiny little things that can only be seen by microscopes. That's why they're called microbes! One of the few disliked nonnative microbes is called the whiling disease. It is found in Yellowstone Park. The whiling disease is disliked for its fatal condition for trout. For more info on the whirling disease CLICK HERE.
There are also different microbes like the Sudden Oak Death and others. The Sudden Oak Death (also known as SOD) has been around since 1995! The fungus like pathogen that makes it is called Phytophthora ramorum. The Sudden Oak Death lives mostly in California. For information CLICK HERE. or HERE.