Diseases Transmitted by Bugs: Common Vectors, Symptoms, and Prevention

Mosquitoes, ticks, fleas, and some other biting pests can spread viruses and bacteria that make people sick. These pests are known as vectors, and the illnesses they spread are called vector-borne diseases.

Most bites do not cause disease. However, reducing bites, managing pests around your home, and knowing when to seek medical care can help protect your family.

What Are Vectors?

Vectors are living organisms that can carry and spread disease-causing germs, also called pathogens. Common vectors include mosquitoes, fleas, body lice, and ticks.

A vector may pick up a pathogen while feeding on an infected animal or person and spread that pathogen during a later bite or exposure. Not every mosquito, flea, tick, or louse carries disease, and not every bite leads to illness.

Why Are Vector-Borne Diseases a Growing Concern?

Vector-borne diseases remain an important public-health concern in the United States and worldwide. Their spread is influenced by many factors, including travel, trade, urban development, changes in weather patterns, wildlife populations, and the environments where vectors live.

Some vector-borne diseases, such as plague, have affected people for centuries. Others, including Heartland virus disease and Bourbon virus disease, have been identified more recently in the United States.

While locally acquired malaria remains rare in the United States, isolated cases have occurred in recent years. This is a reminder that preventing mosquito bites, tick bites, and flea exposure remains important.

Common Vectors and the Diseases They Can Spread

The diseases found in your area depend on the type of vector present, local animal populations, climate, travel patterns, and other environmental conditions.

What Are Vector-Borne Diseases?

Vector-borne diseases are illnesses caused by viruses, bacteria, or parasites that are spread by certain mosquitoes, ticks, fleas, lice, and other vectors.

In the United States, some of the better-known examples include:

• Lyme disease
• Rocky Mountain spotted fever
• West Nile virus
• Dengue
• Zika
• Flea-borne typhus
• Plague
• Ehrlichiosis

Many vector-borne diseases are uncommon, but some can become serious without timely medical evaluation and treatment.

Symptoms to Watch for After a Bite

Most mosquito, flea, and tick bites cause only temporary itching, redness, or minor swelling. Still, contact a healthcare professional promptly if you develop symptoms after a known or possible exposure to ticks, mosquitoes, or fleas.

Symptoms may include:

• Fever or chills
• Headache
• Rash
• Unusual fatigue
• Muscle or joint aches
• Nausea or vomiting
• Swollen lymph nodes
• Neck stiffness
• Weakness, confusion, tremors, or other neurological symptoms

Tell your healthcare provider where you were outdoors, whether you found a tick attached, and whether you recently traveled.

When to Seek Emergency Care

Call 911 or seek emergency medical attention immediately for trouble breathing, swelling of the lips, tongue, or face, fainting, chest pain, or other signs of a severe allergic reaction. These symptoms may be related to an allergic reaction to a bite or sting and should not be ignored.

Can Disease-Carrying Pests Get Inside Your Home?

Some vectors live outdoors but can enter your home or be carried inside.

Mosquitoes can enter through open doors, damaged window screens, garages, and other openings. They may also breed near containers that hold standing water, such as buckets, birdbaths, flowerpot saucers, toys, gutters, and uncovered rain barrels.

Ticks can hitch a ride indoors on clothing, pets, backpacks, and outdoor gear. Fleas may be brought inside by pets or wildlife that spend time near your home.

A clean, well-maintained property will not eliminate every pest risk, but it can make your home and yard less attractive to mosquitoes, fleas, rodents, and other pests associated with vector activity.

How to Help Prevent Vector-Borne Diseases

The best approach combines personal protection with practical pest management around your home.

Use EPA-Registered Repellent

Use an insect repellent labeled for mosquitoes and ticks, and follow the product directions carefully. EPA-registered products may contain active ingredients such as DEET, picaridin, IR3535, oil of lemon eucalyptus, or other approved ingredients.

Apply repellents only as directed on the label. Do not apply products to irritated skin, and use extra care when applying repellents to areas with children.

Wear Protective Clothing Outdoors

When hiking, gardening, camping, or spending time in grassy or wooded areas, wear long-sleeved shirts, long pants, socks, and closed-toe shoes.

Tucking pants into socks can help reduce tick access to your skin. Light-colored clothing can also make ticks easier to spot before they attach.

For additional protection, use permethrin-treated clothing and gear according to label instructions. Permethrin should be used on clothing and gear, not directly on skin.

Avoid Tick Habitat When Possible

Ticks are commonly found in grassy, brushy, and wooded areas. Stay near the center of trails, avoid tall grass and leaf litter, and keep landscaped areas around your home trimmed and maintained.

Check Yourself, Children, Pets, and Gear

After spending time outdoors, check your body, clothing, children, pets, backpacks, and shoes for ticks. Showering soon after coming indoors can help remove unattached ticks and gives you an opportunity to perform a thorough tick check.

Dry clothing on high heat after coming indoors to help kill ticks that may be hiding in fabric.

Eliminate Standing Water

Mosquitoes lay eggs in or near water. At least once a week, empty, scrub, turn over, cover, or throw out containers that collect water.

Pay particular attention to:

• Birdbaths
• Flowerpot saucers
• Buckets
• Toys
• Tires
• Pool covers
• Gutters
• Trash containers
• Rain barrels

Repair damaged screens on windows and doors to help keep mosquitoes outside.

Protect Pets From Fleas and Ticks

Talk with your veterinarian about flea and tick prevention that is appropriate for your pet. Check pets regularly after they spend time outside, wash pet bedding, vacuum frequently, and address flea activity quickly before it spreads indoors.

Professional Pest Management Can Help Reduce Exposure

Professional pest management can help reduce mosquito breeding sites, flea activity, pest harborage areas, and other conditions that make your property more attractive to biting pests.

At Bulwark Exterminating, we use an integrated pest management approach that focuses on inspection, exclusion, habitat reduction, monitoring, and targeted treatments. Our goal is to help make your home and yard less favorable for pests while giving you practical steps to reduce exposure between services.

Protect Your Family From Disease-Carrying Pests

Most bites are not dangerous, but preventive action matters. Use repellent, keep standing water under control, inspect for ticks after outdoor activity, protect pets from fleas and ticks, and seek medical care promptly when symptoms develop after exposure.

Contact Bulwark Exterminating to learn how our pest management services can help reduce mosquito, flea, and other pest activity around your home.