Flea and Tick Control in Los Angeles for Homes, Yards and Pet Areas

Fleas in Los Angeles County are more than an itch. The County Department of Public Health counted 220 cases of flea-borne typhus in 2025, the highest number it has ever recorded and up from 187 in 2024, and described a sustained upward trend. Nearly nine in ten of those patients were hospitalized, and their ages ran from 1 to 85. The department also tracked three localized outbreaks that year, in Central Los Angeles, the City of Santa Monica and the unincorporated Willowbrook area of South LA County.

The pattern continued in 2026. In September the department announced a second outbreak of the year, this one in the Wilshire Center neighborhood of the City of Los Angeles, with seven people sick and six of them hospitalized (all recovered), and 109 cases countywide by that point in the year.

The fleas that spread the disease live on rats, free-roaming cats and opossums, which often look perfectly healthy. People are infected when flea dirt gets into a scratch or cut or is rubbed into the eyes. Symptoms such as fever, headache, rash and body aches usually start one to two weeks later; the illness is treatable with antibiotics and does not pass from person to person.

For a household, the practical link is the pet. A dog or cat that crosses paths with an opossum or a stray under the house can carry those fleas inside, which is why the county urges year-round flea control for pets, no pet food left outdoors and closed-off crawl spaces. PesPro removes the fleas already living in the home and yard, and handles rats through its rodent control program. Opossums and stray cats are a matter for local animal control, and anyone with typhus-like symptoms after flea or animal exposure should see a doctor promptly. [2] [3] [4]

Most people only ever see adult fleas, but the adult is the smallest part of an infestation. UC IPM explains that adult cat fleas stay on the animal, where a female lays roughly 20 to 50 eggs a day.

The eggs are smooth and roll off into pet beds and carpet, hatch in about 2 to 5 days, and release larvae that spend 8 to 15 days feeding on the dried-blood droppings adults leave behind. Larvae need protected, humid places, which is why the heaviest flea activity indoors sits right where the dog or cat sleeps. At normal room temperature the full cycle takes about 18 days.

The stage that defeats most treatments is the pupa. Each one spins a silk cocoon camouflaged with pet hair and carpet fiber, and cool conditions can hold a fully formed flea inside for up to 12 months. Warmth and pressure, such as footsteps or a vacuum passing over, trigger it to emerge.

The pupa explains a familiar complaint: a house or apartment sits empty for a while, then fleas seem to appear from nowhere the week a new family moves in. Insecticide sprays and growth regulators do not kill pupae, so UC IPM notes that fleas keep emerging for about two weeks after a treatment.

PesPro plans flea work around that delay rather than promising instant results. The first visit hits the adults and larvae where they develop. Your daily vacuuming coaxes cocoons to open while the treatment is still active. A follow-up treatment then targets the adults that emerged afterward. A few fleas in the first week or two is expected; a fresh wave weeks later usually means a source is still feeding the problem, such as an untreated pet or wildlife bedding under the house. [1]

California has several hard ticks, and they behave very differently. The California Department of Public Health's guide to common ticks lists the brown dog tick and the western American dog tick throughout the state, and the Pacific Coast tick and western blacklegged tick along the coast and foothills. The brown dog tick can carry Rocky Mountain spotted fever and related spotted fevers; the Pacific Coast tick is linked to Pacific Coast tick fever, spotted fevers and tularemia; and the western blacklegged tick is the species behind Lyme disease, anaplasmosis and hard tick relapsing fever in California.

If ticks are turning up inside a Southern California home, the Orange County Vector Control District says they are probably brown dog ticks, the only species that frequently infests houses and yards in the region. This tick does not breed in open country.

The brown dog tick feeds on the dog, drops off, and hides in cracks, under rugs and behind baseboards, where females lay their eggs; every new stage climbs back onto the dog to feed. Breaking that loop takes both halves: the veterinarian protects the dog, and the house gets crack-and-crevice treatment around the places the dog eats, sleeps and rests, which is how PesPro approaches an indoor tick call.

The western blacklegged tick is an outdoor problem. CDPH has found it in 56 of California's 58 counties, mostly in cool, moist grass, leaf litter and low brush, in urban areas as well as rural ones.

Western blacklegged tick nymphs are about the size of a poppy seed, and an infected tick must stay attached for at least 24 hours to pass on Lyme disease, so a careful tick check after a hike matters. On properties that back onto hillsides or brushy lots, PesPro treats the yard edges and resting spots where dogs pick ticks up; open space and trails are outside what any yard treatment can reach. [5] [6] [7]

A fogger treats a room evenly, but flea larvae are not spread evenly. They gather where adult fleas drop their blood-rich droppings, which means deep in the carpet beside the dog bed, under the sofa the cat naps on, and along baseboards next to pet resting spots. Whatever does reach them, none of it touches the cocoons, and that is the stage still holding the next wave of adults. A homeowner who fogs once, sees fewer fleas for a few days and then sees them again has usually watched the cocoons hatch on schedule.

Product choice is the second trap. UC IPM reports that many cat flea populations in the field are resistant to pyrethroids such as permethrin, so a spray built around those ingredients can underperform no matter how much is used. It also warns that permethrin and amitraz products must never be applied to cats, which matters in homes where a dog product ends up on the family cat. Professional treatment means choosing products for the life stage and the surface, applying them where the larvae actually are, and keeping them away from pet food, water and bedding that will be washed.

Outdoors, the common mistake is spraying the whole lawn. UC IPM notes that immature fleas rarely survive in direct sunlight and that outdoor treatment belongs only where pets rest, such as doghouses, the ground under decks and the strip along the foundation, and only when adults are present in real numbers. A white-sock walk through those spots shows quickly whether they are. PesPro's yard treatment follows that logic: shaded resting areas, dog runs, leaf litter and the crawl-space edges where wildlife beds down, rather than an open, sunny lawn that never held fleas in the first place. [1]

Flea control on the animal itself is a veterinary decision. UC IPM advises pet owners to ask their veterinarian which product fits each animal, and several of the oral and topical flea medicines are veterinary drugs that require a prescription. PesPro does not apply anything to dogs or cats. What we do is treat the environment those animals live in and give you guidance on timing, so the pet's treatment and the home's treatment overlap instead of leaving gaps that fleas can use.

Both halves are needed because the cat flea depends on both. Adults live on the pet and shed eggs all day; if the pet goes untreated, it keeps reseeding the carpet. If the home goes untreated, cocoons keep releasing adults that jump straight back onto the pet.

For the same reason, every dog and cat in the household should be on the veterinarian's plan within the same window, including the indoor cat that never seems to scratch. The stakes are not only comfort: UC IPM notes that a single bite can set off flea allergy dermatitis in sensitive pets, and that dogs and cats can pick up tapeworms by swallowing infected fleas while grooming, as children occasionally can too.

Inside the home, PesPro uses pet-safe formulations applied according to California Department of Pesticide Regulation guidance, and the technician explains how long pets and people should stay off treated carpet and furniture before they return. Tell us what your veterinarian prescribed and when it was given, and we will line up the visit and the follow-up around it. Visits can be handled in English or Spanish. [1]

A home that was treated thoroughly will reinfest if animals keep bringing fleas to it. UC IPM names feral cats, opossums, squirrels and coyotes as common sources of outdoor flea problems, and the advice from Los Angeles County Public Health lines up: do not leave pet food outside, do not feed or handle free-roaming animals, keep trash in containers with tight lids, clear yard debris, trim overgrown plants and close off crawl spaces and other openings where animals can hide. Strays and opossums near the house should be reported to local animal control.

Sunlight does a lot of the work for free. UC IPM recommends opening up the spots where pets sleep outdoors by cutting back low-hanging vegetation, because immature fleas struggle to survive in sun. Indoors, washing pet bedding in hot, soapy water at least once a week and vacuuming regularly keep eggs and larvae from building up between treatments.

A slow walk in knee-high white socks through the pet's favorite outdoor spots every few weeks is an easy way to confirm the yard has stayed clear, since any fleas present jump on and show up against the white fabric. Keep pets on the flea control your veterinarian recommends all year; the county's advice is year-round, not summer-only.

When rats are the reason fleas keep showing up, PesPro's rodent control and rodent exclusion services deal with the animals and the gaps they use, and the flea work can be scheduled alongside. PesPro also offers prevention programs for ongoing protection, and under PesPro's guarantee, if pests return between scheduled visits, we come back at no additional charge. [1] [2] [3]