Flea Facts and Information

August 10, 2025

Fleas have existed for millions of years, feeding on the blood of animals and humans. They are commonly found on pets and mammals, as well as in carpets, sofas, and other household and farm environments.

Flea Distribution in the Home

In a typical indoor environment, flea populations are often spread across different life stages:

  • 5% on pets

  • 10% as cocoons in carpets

  • 35% as larvae in carpets

  • 50% as eggs in carpets

Life Cycle of a Flea

Female fleas lay eggs that develop through several stages:

  • Eggs hatch into worm-like larvae

  • Larvae develop into pupae

  • Pupae form a cocoon and remain dormant

  • Fleas emerge when they detect warmth or movement

When triggered by a nearby host, fleas can emerge in seconds and jump onto animals or humans. They are capable of jumping up to four feet.

Health Risks and Diseases

Fleas can transmit several diseases, including:

  • Plague (Yersinia pestis) – spread by fleas on rats; serious but treatable

  • Murine typhus (Rickettsia typhi) – transmitted by rat fleas such as Xenopsylla cheopis

  • Tungiasis (Tunga penetrans) – female fleas burrow into the skin, often requiring medical removal

  • Tapeworms and tularemia

  • Allergic reactions in humans and pets

Flea Control and Treatment

Flea control should target all life stages to be effective:

  • Eggs

  • Larvae

  • Pupae

  • Adult fleas

Even if adult fleas are eliminated, immature stages can continue developing and reinfest the home within weeks.

Homeowners may treat infestations themselves, but professional pest control is recommended for severe cases or when chemical safety is a concern.

Additional Information

More information on fleas—including infestations in carpets, rugs, furniture, vehicles, lawns, and pets, as well as natural remedies—can be found through dedicated flea resources.

Call Kearbys Pest Control in the Yuba-Sutter area for assistance.