What Diseases do Flies Carry?

Flies may ruin a family barbecue or sunny afternoons on the patio. Furthermore, because of the infections they can carry, they pose a serious health risk.

When you spot a fly, make an extra effort to keep it from landing on your food. According to studies, all types of flies are capable of carrying hazardous pathogens and diseases.

So, what diseases are carried by flies?

These diseases differ due to a variety of circumstances, including bug species, environmental factors, and more. Some of these disorders, as well as others, are discussed in the guide below.

What Diseases do Flies Carry?


Food courts, food markets, dumpsites, landfills, home garbage, and other urban areas are likely to have flies. Farms, particularly those with animals such as cattle, are included in the rural sites.

These insects are likely to spread the following diseases:

1. E. coli

E. coli, a serious disease, is thought to be transmitted by houseflies, according to experts. It can cause vomiting, stomach cramps, fever, and blood in the stool, among other things.

Furthermore, symptoms will appear three to five days after infection. However, it’s possible that you’ll see it in as little as two weeks.

E. coli symptoms can differ from person to person. Stomach cramps, vomiting, cramping, and other symptoms may occur. In addition, some people may develop a fever, with temperatures reaching 101 degrees Fahrenheit (38.5 degrees Celsius).

2. Anthrax

This term refers to a bacterial infection that can take many different forms. In the intestines, lungs, skin, and via injection, for example. The cutaneous form, on the other hand, is associated to flies and shows as a swollen blister.

The blister will turn into a non-painful wound with a dark center. This illness, if left untreated, can cause a lot of pain and physical problems.

Biting flies are the most common vectors of Anthrax transmission. Symptoms such as swelling, redness, and more may appear within a few days.


3. Food Poisoning

When someone eats tainted food, this happens. It’s a medical disorder that can cause nausea, vomiting, stomach cramps, loss of appetite, and other symptoms.

Food poisoning is a discomforting and unpleasant experience that will go away on its own. This disease is spread by flies carrying dirt and bacteria on their bodies.

It’s common among those who live in dirt-filled areas.

Vomiting, fever, weakness, loss of appetite, and headaches are all classic symptoms of food poisoning.

4. Tularemia

This term refers to a bacterial infection that can manifest itself in a variety of ways. The most common symptom is an ulceroglandular lesion that develops around the afflicted area.

Expect the ulcer to be accompanied by swollen and red lymph glands, which may appear under the armpit.

Although it is a rare infectious condition, it can cause a variety of additional symptoms. Joint discomfort, headaches, chills, fever, and other symptoms are among them. Furthermore, the sickness is often known as rabbit fever or “deer fly” fever.

5. Conjunctivitis

The conjunctiva, a translucent membrane that lines the inside of the eye, becomes inflamed or swollen. The conjunctiva is a thin, translucent tissue that lines the inside of the eyelid.

It’s a frequent eye problem that can quickly spread through densely crowded locations. Swelling, tearing, and itching are some of the usual signs of the condition.

Many people refer to the disease as pink eye, which can be caused by infections transferred by houseflies.

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Hover fly

6. Typhoid fever

Salmonella, a type of bacteria that frequently causes fever, has been linked to the condition, according to researchers.

The sickness is infectious and can be contracted by drinking tainted water. The diseases are spread by house flies, which exhibit a variety of symptoms.

While the disease is treatable and manageable, it was difficult to manage before to the adoption of antibiotics. Typhoid and its consequences had a 20 percent death rate on average.

More specifically, mortality occurred as a result of a variety of complications including pneumonia, intestinal perforation, and more.

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Studies on Flies and the Diseases They Carry

It’s beneficial for you to learn about some of the published research and facts about the disease that houseflies spread. It contains facts that should help you understand flies and disease better:

Houseflies are responsible for the spread of over 65 diseases to people, according to a recent study by Penn State’s Department of Entomology. Cholera, yaws, tularemia, leprosy, and a variety of other diseases are among them.

Another study found that the transmission of H.Pylori is carried out by Bowflies and Houseflies. The flies are responsible for the spread of the disease in over 15 cases. It’s a bacterial infection that can cause ulcers in humans.

Flies carry a variety of pathogens, according to this paper titled “A systematic assessment of human pathogens carried by the housefly (Musca domestica L.).” Fungi, parasites, bacteria, and other organisms are among them. The study also suggests that additional research is needed to determine the infections that flies can transmit.

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These pathogens can easily degrade your quality of life or disrupt your regular routine. However, the following are some helpful hints for avoiding the diseases that flies carry:

Flies flourish in unsanitary environments, so practice good hygiene. Damp regions, puddles of water, shrubs, and other hazards are among them. So, clean up these places and do some landscaping on your own.

Learn more about flies and how they differ from one another. Gaining an understanding of some of them will make identifying the diseases they can spread much easier.

Install pest control measures — there are a variety of methods for controlling insect populations. Air conditioners, window meshes, altered lighting, and other items are among them.

Facts about Flies

FAQ: What Diseases do Flies Carry?

Is it possible for flies to make you sick, and what is the worst that could happen?

Yes, flies can make you sick by transmitting a variety of diseases and viruses. Furthermore, they have the potential to make life at home uncomfortable.

What diseases are transmitted by horseflies?

Only the female horseflies bite when the larvae are being produced. They are capable of transmitting diseases like the horse infectious anemia virus and some trypanosomes.

Is it possible to get food poisoning from flies?

Food poisoning and even diarrhea can be caused by flies. These are health issues that arise when dangerous germs are present in the stomach.


Know that the next time you see a fly, disaster is not far away. The good news is that if you are fully informed, you can avoid any risk, such as the sickness carried by these insects.

As a result, when someone asks, “What diseases do flies carry?” Tell them that diseases come in a variety of forms, and that staying informed is an excellent approach to avoid them.

Collin Miller

Since 2002, Collin has specialized in the pest control industry. He has a Pest Control and Termite Control Commercial Applicator License. He serves on the Missouri Pest Management Association board of directors as a director at large, and he attempts to provide a personal touch in pest eradication to customers in the Ozarks. When the weather is great, Collin enjoys working in his yard, cooking, and hanging out with family and friends, as well as watching football.

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