How can I effectively prevent and treat fleas on my long-haired cat?

To effectively prevent and treat fleas on your long-haired cat, you can use a combination of methods such as regular grooming with a flea comb, using flea prevention products recommended by your veterinarian, keeping your cat's environment clean, and washing their bedding regularly. It's important to consult with your vet for the best treatment plan for your cat's specific needs.