There is an interesting article in May 2014 Animal Wellness Magazine (I love this magazine) about cats and Lyme disease.
Most veterinarians (although not all) believe that cats do not get sick from Lyme disease when they have been exposed to it. They can test positive for the disease but not develop symptoms.
Still, ticks carry other diseases – even some which can be fatal for cats, so it is important to protect your cat from ticks. Keeping your cat away from tall grass and wooded areas where ticks are more prevalent is important.
And keep their immune system strong with a diet of high quality food. For many of us, trying to get our cat to take supplements is a stressful and often unsuccessful experience.
Prevention is the best tonic!