I assume you mean in the pool water.

You want to shock your water up to the recommended shock level for your level of stabilizer (CYA).

I suggest you keep it there for 24-48 hours, to see if the FC stays high AND to ensure you have a CC level of 0.

Essentially, you want to follow the same procedure as for fecal matter in the pool.

If someone has a better or more specific rec, please post it.

Blood on the deck, etc. can be cleaned up with bleach.