How Do I Know If My Beer Is Infected ?

[bottle0]

im doing my first brew of tooheys home brew beer and im not sure how to tell if my beer is infected what are the sighns of infection.

 

[Kentunkel]

Check out this thread: https://www.homebrewtalk.com/f39/post-your-infection-71400/

Taste it. Any off flavors? Like sour, vinegar, farm animal, buttery....