Hi Katie -
Any animal protein has the capacity to carry parasites from what I understand. Anything you put in your mouth does for that matter. Having animals around, etc. You can't ever avoid parasites entirely.
You can however, alkalize your system -- as your username suggests! -- which is the best preventative measure you can take. Better to focus on that and positive thinking, rather than feeling like you can't eat anything, which can be depressing and certainly isn't going to help.
A great affirmation is to affirm that your body has the strength and power to process whatever it encounters. Then, keep focusing on cleansing, strengthening and alkalizing your system and this affirmation will in fact, be true;-)