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The most common flea found on cats and dogs is the cat flea (Ctenocephalides felis), although any species of fleas, including fleas from rabbits, squirrels or other wildlife, can be found on cats.
“Under ideal conditions, the flea can complete its entire life cycle in as little as two weeks; in adverse conditions, the cycle can take as much as a year.”
The most important source of cat fleas is newly emerged adult fleas from flea pupae in your house or yard.
Under ideal conditions, the flea can complete its entire life cycle in as little as two weeks; in adverse conditions, the cycle can take as much as a year.
Homes with carpets and central heating provide ideal conditions for the year-round development of fleas. The highest numbers of flea eggs, larvae and pupae will be found in areas of the house where pets spend the most time, such as their beds and furniture. Even though fleas may be in your house, you probably won’t see them. The eggs are tiny white specks the size of dust particles, while the larvae, which are somewhat larger, with dark heads and lighter bodies, migrate deep down in carpets, furniture or cracks in floors away from the light.
“Apparent failure of treatment almost always results from improper application of the preventive, inadequate treatment of the home or exposure to other infested pets or environments.”
There is no evidence of fleas developing resistant to insecticides, especially the newer once-a-month topical flea preventives that contain a sterilizing agent or IGR in addition to the adulticide. Apparent failure of treatment almost always results from improper application of the preventive, inadequate treatment of the home or exposure to other infested pets or environments. Consider treating storage sheds cars and any outdoor sleeping spots. Bear in mind that your cat may be going into other people’s houses. Most of these problems can be overcome by using an effective product with residual activity on the cat in addition to treating your home.
Many cats live with fleas but show minimal signs. However, the following problems can occur:
This can be a challenging task and requires a three-pronged approach. Fleas need to be eliminated from:
Even this thorough approach may not give 100% control, since you cannot control some sources of fleas such as other people’s pets, wild animals or other property outside yours.
Although most topical insecticides will kill adult fleas, many have limited effectiveness because they only work for a few hours after application. This is particularly true of flea shampoos and powders; they kill fleas present on your cat at the time of application but have little residual effect; the following day the cat may again have fleas. Newer products with excellent residual activity are available from your veterinarian.
“Some topical flea products are applied monthly and are highly recommended because of their efficacy and ease of application.”
Many cats strongly dislike being sprayed. Consult your veterinarian, as there are several alternatives available. Flea collars may seem very convenient but most don’t work well (the exception of the Seresto collar) Flea collars, especially ones with a strong pesticide smell, may be harmful to some cats, or may cause a skin reaction or rash. Some topical flea products are applied monthly and are highly recommended because of their efficacy and ease of application.
A flea control program needs to be individually tailored based on the lifestyle of your cat and other pets, and your family situation. Your veterinarian is the best person to advise you about safe and effective flea control products.
Fleas are easy to find if a cat is heavily infested. If fleas are present in smaller numbers, it can be harder to see them. Fleas move fast! Try looking on the cat’s stomach, around the tail base and around the neck. Sometimes adult fleas cannot be found but “flea dirt” can be seen. This is fecal matter from the flea that contains partially digested blood, and it is a good indicator of the presence of fleas. Flea dirt is seen as small black specks or coiled structures; when placed on damp white tissue, it dissolves, leaving a reddish brown stain. Flea dirt may be found in cat’s bedding even when fleas cannot be found on the cat.
“Cats are very efficient at removing debris from their coat’s using their tongues and may succeed in removing all evidence of flea infestation such as adult fleas and flea dirt.”
In cats that develop an allergy to fleas, one of the symptoms is excessive grooming. Cats are very efficient at removing debris from their coat’s using their tongues and may succeed in removing all evidence of flea infestation such as adult fleas and flea dirt. One of the most common causes of feline allergic skin disease is flea allergy dermatitis. To eliminate this possibility your veterinarian may advise rigorous flea control even though no fleas can be found. If the cat’s skin problem improves with flea control then it suggests that flea allergy is involved.
Not necessarily! Pre-adult fleas can survive for up to 140 days within their protective pupa. When you or your pets are absent from home for extended periods of time these adult fleas remain in the pupae because no host is available. As soon as you or your pet returns home, these fleas will emerge in large numbers and jump onto cats, dogs and even people in the search for a blood meal. Vibrations (from walking) and/or increased carbon dioxide (from breathing) will trigger the emergence of fleas from their pupae.
A number of different products are available which will kill the adult and larval stages of fleas and stop the flea life cycle, such as:
Sprays for use in the house should be used in places where the flea eggs, larvae and pupae are likely to be. It is recommended that you treat the entire household first and then concentrate on the hot spots – your cat’s favorite napping spots – such as soft furniture, beds and carpets. Once they hatch from the egg, flea larvae move away from the light and burrow deep into carpets and into other nooks and crannies where it is difficult to reach. Be sure to move cushions, furniture and beds to spray underneath them. Other places larvae are likely to live include baseboards and the cracks and crevices between floor seams or boards.
“You will need to throw away the vacuum bag to prevent eggs and larvae from developing inside the vacuum cleaner.”
Flea eggs and pupal cases are extremely tough and resistant to the effects of insecticides. To remove these stages, as well as eliminate dead fleas, your pet’s bedding should be washed in hot water or replaced. Regular and thorough vacuuming of your carpets, floors and soft furnishings can remove a large number of flea eggs, larvae and pupae. You will need to throw away the vacuum bag to prevent eggs and larvae from developing inside the vacuum cleaner. Vacuuming prior to the application of a spray to the house is recommended because the vibrations will encourage newly developed fleas to emerge from pupae, which will then be killed by the insecticide.