You should know that Cat Scratch fever is also brought on by fleas, and cat bites. And its not necessarily the fact that the cat scratches you and it becomes infected, its actually because a bacteria found in cat claws that can cause it, in fact 40% of cats are infected with this bacteria, commonly known as Bartonella henselae. Kittens are far more likely to carry this bacteria than older cats, outdoor cats are also at a higher risk for giving you the disease. What most people are unaware of is the fact that CSD (Cat Scratch Disease, or Cat Scratch fever) can also be brought on by cat bites and fleas. To help lower your risk of catching this disease is to 1: not play hard with your cat; i.e biting and scratching the hands type of play (my cats are not allowed to play this game with me or other people). 2: if your cat does scratch you by accident or on purpose, wash the area with soap and hot water. 3: teach your kids that its not okay to play rough with your cat and if the cat becomes distressed then stop what you're doing and come back later to play--same goes for you.
Note: not all cat scratches led to CSD, I've been scratched by cats like 800,000 times and I've never caught CSD. Thankfully.