Cats who are feral or avid mousers consume raw meat on a regular basis with few ill effects. However when it comes to ground beef the meat needs to be fully cooked. Meat ground for raw cat food is always frozen immediately to reduce bacterial proliferation.
Never feed your cat raw ground beef. Chicken meat can also be useful when in need of an incentive or treat. Cats are obligate carnivores. Grinding raw meat exposes it to pathogens and makes it more dangerous for cats to consume.