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Scientific Name: Ctenocephalides felis (Bouche)
Fleas are one of the more important groups of insect pests because they not only cause discomfort by biting, but they can transmit several diseases such as plague and murine typhus. Cat fleas are found throughout the United States and the rest of the world.
Adults about 1/8" (2.5 mm) long. Body laterally flattened (side to side); wingless. Color brownish black to black, but reddish black when full of blood. Female's head twice as long as high. Compound eyes well developed. Both genal and pronotal combs present, each composed of 16 spines, and genal comb's first 2 anterior spines of about equal length. Femur of hind leg with 7-10 bristles on inner side. Abdominal terga (dorsal plate of segments) 2-6 with a single row of bristles. In addition, antennae short, 3-segmented; ocelli lacking; legs long, coxae large, tarsi 5-segmented; usually jumping insects; mouthparts piercing-sucking with well-developed palps.
Mature larvae about twice the adult length (1/4"/3-5.2mm). Larvae whitish, slender, eyeless, and legless. With a well-developed head. Anal struts/hooks 2, small. With moderately long, backward-projecting hairs (setae) encircling each segment. Last abdominal segment (10th) with 3 ventrolateral hairs (setae).
(1) European mouse flea (Leptopsylla segnis) has genal comb with only 4 spines.
(2) Rabbit flea (Cediopsylla simplex) with genal spines oriented vertically (vs. horizontal), comb spines with blunt/rounded ends.
(3) Dog flea (Ctenocephalides canis) with head length less than twice height, genal comb with spine I (anterior most) distinctly shorter than spine II (adjacent spine to posterior/ rear), hind leg femur with 10-13 bristles on inner side.
(4) Other fleas (various families) lack having both pronotal and genal combs or if both pronotal and genal combs present, then either have abdominal combs or have fewer than 16 spines in pronotal comb.
Females lay 4-8 eggs after each blood meal, laying some 400-500 during their lifetime. The eggs are not glued/stuck to the hairs or body but are deposited on or between hairs, or in the nest or bedding material. Hence, eggs deposited on the animal either fall or are shaken off, and are frequently found in cracks and crevices where pets sleep or frequent. Eggs are oval, whitish, and about 1/64" (0.5 mm) long. They usually hatch in 1-12 days.
Flea larvae move about using the setal rings and abdominal struts/hooks. They have chewing mouthparts and feed on organic debris but almost all require dried fecal blood in order to complete development; they do not bite but feed on adult flea fecal blood. Larvae require high relative humidity (45-95%) and 1-2 weeks to several months to go through 3 instars. Last instar larvae then spin a cocoon and incorporate surrounding debris on its surface which provides camouflage. Under favorable conditions, the pupal stage may last 4-14 days or up to a year under harsh conditions. The pre-emerged adult remains in the cocoon for up to 20 weeks, where it is protected from adverse conditions, including pesticides. Adults are stimulated to emerge from the cocoon by mechanical depression of the cocoon, an increase in temperature, and possibly vibrations. Larvae and pupae are typically found where the animal sleeps or frequents.
Cat fleas may transmit plague. There is very strong circumstantial evidence that they may transmit murine typhus. Cat fleas serve as intermediate hosts of the dog tapeworm, Dipylidium canninum (Linnaeus), and the rodent tapeworm, Hymenolepis diminuta (Rudolph). These tapeworms occasionally infest humans, especially very young children. The dog tapeworm commonly infests cats that spend time outdoors.
Indoor control. The homeowner or occupant must do the following just before the flea treatment: remove all items such as toys and pillows off the floor or carpet; remove all articles from under beds, on closet floors, and from under furniture; vacuum all upholstered furniture, floors, and carpeting, paying particular attention to the foot of the furniture on which the pet rests, under furniture, and wall-floor junctions. The vacuum bag must be immediately removed and put into a plastic garbage bag, the top sealed, and then placed in an outside garbage receptacle or burned. Thoroughly clean all areas frequented by cats, e.g. table tops, refrigerator tops, window sills, counters, etc. Cover aquariums and turn off the pumps prior to the treatment. Be sure to remove all pets, including birds.
Outside control. Minimally, spot treatment should be done. This consists of treating with an appropriately labeled pesticide and light-stable IGR, every place the animal rests, naps, or sleeps which are typically cool areas such as next to the building's foundation, porch, etc., or under a bush or tree. In addition, band treatment is often helpful, especially if overall treatment is not going to be done. Band treatment is done with an appropriately labeled pesticide which is applied in a 6-1 0 foot band around the perimeter of the building. For dogs confined to a fenced-in yard, also treat the 3-4 feet adjacent to the fence on the side to which the dog has access. If the infestation is severe, overall yard treatment may be required and an appropriately labeled pesticide should be used. Wettable powder and microencapsulated formulations are particularly effective outdoors. Note that if the pet is on Proban, Prospot or similar product, use of such a product should be discontinued one week before treatment and until one week after treatment.