Yes, but some micro organisms that are like that are either too small for scientists to always spot, plus some of them don't just eat the cancer cells. They continue on. You have to realize that decomposes eat and eat on at decaying bodies to the extent that they are just a skeleton. Injecting micro organisms like that into the body is highly dangerous and fatal. A person could slowly die of blood loss if scientists and doctors don't figure out where the organism is and how to get it out of the body. That organism would be in the blood stream making it harder to get out than a tapeworm, that usually hang out in the stomach and taking medication can get them out. So I would not suggest you tamper with decaying animals. You could get sick without gloves.
The lithosphere - rocks (or geosphere) The Earth's solid surface is the lithosphere. It includes continental and oceanic crust as well as the various layers of the Earth's interior.
