Fleas are one of the most common bloodsucking parasites infesting homes worldwide. Very small but capable of causing itchy red bites, they irritate pets and humans alike. They were largely responsible for spreading the "black death" that killed an estimated 25 million people in 14th century Europe.
Though flightless, fleas can jump extremely long distances, catching rides on pets and rodents. Prevention requires pet treatment and rodent exclusion.
Fleas belong to the order Siphonaptera with superfamilies including Pulicoidea, Malacopsylloidea, Ceratophylloidea, Vermispsylloidea, and Hystrichopsylloidea. Species are identified by their preferred host:
Ctenocephalides felis
Host: Cats (most common)
Ctenocephalides canis
Host: Dogs
Pulex irritans
Host: Humans
Xenopsylla cheopis
Host: Rats
Oropsylla montana
Host: Squirrels
Ctenocephalides gallinae
Host: Birds
Most fleas share similar features: small, wingless insects with 6 legs covered in tiny spines and bristles for secure host attachment.
Evolved to find and infest hosts. Attracted to CO2 from breathing. Can jump 150-200x body length. Backward-facing spines allow quick movement through hair while staying attached. Mouths penetrate skin to draw blood.
Smallest, hard to see. Thin body. Found anywhere hosts are.
Sesame seed size (unfed). Flat and wide. Primarily found outside.
Apple seed size. Flat and wide. Found in/around mattresses.
Fleas bite hosts to draw blood, resulting in itchy red bites. On animals, they gather on the back and neck where scratching is difficult. On humans, they attack legs and ankles.
Bites can cause severe skin irritation, infection from scratching, and allergic reactions.
Yes. Beyond irritation, flea bites can transmit pathogens directly into the bloodstream:
Diseases: Bubonic plague, Murine typhus
Parasites: Tapeworms
Conditions: Anemia (insufficient red blood cells)
Catching an infestation early is critical. Look for these signs:
Pets scratching, biting, or licking more than normal
Seeing fleas on pets or yourself
Flea feces in pet fur or around bedding
Small red itchy bumps on lower extremities
Fleas caught in monitoring traps
Fleas develop through 4 stages. The entire process takes as little as 21 days in optimal conditions or several months if conditions are poor:
Almost invisible, translucent white. Females lay 20-40 eggs/day. Not secured to host, fall to ground.
Small, legless, worm-like. Feed on "flea dirt" from adults until ready to pupate.
Spin into cocoon. Remain dormant until developed into mature fleas ready to feed.
Ready to feed and lay eggs. Survive 2 weeks without food, months with blood meals.
Important: 95% of fleas in your home are eggs, larvae, and pupae deep in carpets. Only 5% are adults on hosts.
Pets or humans pick up fleas walking through tall grasses or wooded areas. Once home, flea eggs shed around the house and develop into adults. Small populations quickly explode into full infestations.
Most active in warm, humid conditions when they mature faster. Also active in light (rely on eyes to detect movement). Cold temperatures cause eggs and pupae to remain dormant.
Prevention requires a multi-faceted approach. Each pillar is useless without the others:
Medicate pets with specialized flea treatments. Check and bathe pets regularly to ensure they are flea-free.
Fleas target any warm-blooded host. Exclude rodents to remove alternate hosts.
Vacuum inside regularly and thoroughly. Keep grass cut short outside to reduce flea habitat.
If fleas have infested your home, immediate treatment is critical. A few fleas can reach hundreds or thousands quickly. Treatment may take weeks or months because adult treatment does not always eliminate earlier life stages, allowing populations to rebound in 21 days.
If all other treatment attempts have failed, bring in professionals. Our licensed flea control experts will inspect your property, identify problematic areas, and customize a treatment plan with return service to ensure fleas are completely gone.
Fleas may bite humans, but humans typically do not have the coat fleas prefer to hide in. Regular bathing also helps keep flea populations off humans.
If you notice small itchy bumps around your legs or see your pets scratching more frequently or aggressively than normal, you most likely have fleas.
Yes. Fleas are vectors for disease and can transmit serious pathogens and parasites. Since they also feed on rodents, they can carry bubonic plague, murine typhus, and tapeworms, all transmissible to humans.
