I just had a aortic valve replacement surgery and it was replaced with animal valve. Could I get infection?

All valves at risk. All prosthetic valves are at risk for endocarditis, a very serious development if precautions to minimize risk are not taken. The good news is that bio prosthetic valves, like yours, are generally easier to heal with antibiotics than purely mechanical ones, thus less likely to need reoperation.
Very unlikely. Most patients who have an aortic valve replacement in the us these days get some type of animal tissue. These are carefully treated to minimize the risk of infection.

Related Questions

I just had a aortic valve replacement surgery and it was replaced with a cow valve. Am I going to be okay in the future?

Yes, for many years. An aortic valve is replaced with either a tissue valve, like yours, or a metal/plastic valve. The plastic valves should last for a lifetime, but require you to be on blood thinners for life, which are at best a nuisance and at worst dangerous. Tissue valves do not need blood thinners, but are only expected to last about 10 years, so re-operation may be needed.
Cow valve. Remember spider man? Spider dna overtook his own and transformed him into a. ..Big movie star! If remnants of cow dna remains in the valve then takeover yours, then wow! Otherwise once the valve is ok by the fed drugs agency, if should be clear from any dna...And then a safe option (no cowman).

My mom had an aortic valve replacement surgery and now she's afraid that if she gets stressed it will "blow". Could that happen?

Modes AVR failure. There are two kinds of valves, mechanical and tissue. Mechanical valves don't tend to wear out. Tissue valves will fail with time, but usually don't "blow out". With time, tissue valves will become hardened, rockier, more difficult to move, and this tendency increases with more strain from higher blood pressure, but as a trend over time, not as a blow out. It can give way at the end.

What do you suggest if my mom had an aortic valve replacement surgery and now she's afraid that if she gets stressed it will "blow"?

Relax, Revitalize. With current aortic valve surgery after adequate healing your Mom should really have very few limitations as to activity, and the surgery should actually allow her to do more. I have many patients that have gone back to running marathons, lifting weights, skiing, etc. She should go on a gradual rehab program starting several weeks after surgery but within 2-3 months, better than preop!