Pour litter slowly into the pan to keep dust at a minimum. If possible have someone in the household without allergies do the vacuuming and litter box cleaning. If this is not an option, wear a pollen mask which can be obtained from a local drug store. If your cat is allowed to roam free, it may be bringing home many irritants such as pollen, plant juices, poison ivy, etc. Keep the yard free of dead leaves in the fall, otherwise mold will flourish.
Mold can also be abundant in the grass during prolonged wet periods in the spring.
In addition, live Christmas trees also harbor molds. A coat conditioner should be added to its food to help prevent dry skin and reduce shedding. Coat conditioners can be purchased from pet supply stores or your veterinarian. Bathe your cat about every six weeks. Use a veterinarian-approved shampoo and rinse the cat very well.