Mites are common with new purchases. They become nearly impossible to get rid of and can take over a collection. This is why we have quarantine procedures.

In your prior topic about being worried about Underground Reptiles I told you treating for mites should be done with new arrivals.

First step is treating the shipping container and anything in there aside from the snake as hazardous waste. Triple bag it, get it out of your house, and wipe down anything it touched as well as anything you have touched and the snake has touched.

You will need a mite treatment which should be available at most pet shops. Follow the directions.

Do not introduce the snake to its enclosure, it may well become infested.