It’s not uncommon to have an unpleasant encounter with a rodent at home, but did you know what risks rodents pose to your health? Pests and insects of any kind can be much more than a nuisance. They are carriers of viruses and bacteria that can spread to humans. Rodents, for example, may transmit it to humans indirectly through fleas, ticks, or mites that have fed on an infected rodent.

Risks include hantavirus, lymphocytic choriomeningitis, tularemia, and plague. Moreover, it can trigger allergies and transmit food-borne illnesses such as salmonella. Furthermore, mice can produce up to 25,000 fecal pellets each year and approximately 70 times every day. As a result, in the event of a rodent infestation, prevention and rapid elimination are essential.

Rats, rodents, and even mice pose several health risks, spreading more than 35 illnesses. Humans can contract these diseases by handling living or dead rodents, coming into contact with rodent feces, urine, or saliva, or getting bitten by rats. So, let’s talk more about some risks that rats pose.

What Risks Do Rats Pose?

Rats pose health risks to humans that may lead to severe conditions. Since there are about 35 diseases associated with rodent species, let’s discuss some. 


Diseases can spread in various ways, including through the droppings of rodents. As a result, after pest infestation of rodents, the health danger does not necessarily go away. When people contact rat and mouse urine, feces, or saliva, they can become infected with whatever disease the rodent was carrying.

When bacteria are present in droppings, they can also infect the air, especially if they are disturbed. It is why hiring a local pest control expert in San jose may be beneficial. If you notice droppings at your home, don’t hesitate to contact us for a free estimate and assistance identifying the excrement over the phone or a text message.


The most severe disease spread by rodent infestations is hantavirus. You can contact this by consuming food that has come into touch with infected rodents or rodent droppings. Sometimes, you can get it by simply breathing air that has got exposed to rodent feces. Moreover, rodents can transmit their viruses through their saliva. 

Hantavirus is lethal. Since there is presently no treatment for the disease, you can’t treat it without early detection. So, if you’ve come into touch with a mouse or rodent droppings of any kind and are experiencing symptoms like lethargy, fever, or muscle aches, see a doctor right away! According to the CDC, 36% of hantavirus cases in the United States result in mortality as of 2017.

Lymphocytic Choriomeningitis Virus

The lymphocytic choriomeningitis virus (LCMV) is another prevalent illness carried by rats. According to the CDC, 5% of house rates in the United States have LCMV. Mice can carry the disease for their whole lives without displaying symptoms. Thus all mice should be treated with caution if they are among the 5% affected.

Infected people should anticipate having any or all of the following symptoms during the early phase of their illness. It includes fever, headache, nausea, vomiting, decreased appetite, muscle aches, and headaches. After a few days of recovery from the first phase of illness, symptoms may include meningitis and encephalitis (drowsiness, disorientation, and sensory problems). In addition, some people may experience meningoencephalitis (brain and meninges inflammation) in the worst case.

LCMV happens when humans come into touch with infected rats’ nesting materials, as well as their urine, saliva, or droppings. Although this disease is not lethal, you can contract it more than once. To avoid contracting LCMV, stay away from rats and make sure to seal your home or business. So, rodents can’t freely enter and escape. 

At Expel Exterminator LLC, our approach and system in pest control will provide a long-term solution!

Bubonic Plague

The bubonic plague, responsible for “The Black Death” in the 14th century that killed 30-60% of Europe’s population, is still with us today. Fever, acute weakness, diarrhea, vomiting, abdominal discomfort, bleeding from the mouth, nose, rectum, or under the skin, and blackening and death of tissue are all common signs of the bubonic plague. Fortunately, antibiotics are now available to treat patients and prevent tragic results, but it does not negate the disease’s severe side effects!

Rat-bite Fever

One of the most deadly infections that can arise from having rats in your attic or living area is rat-bite fever. As the name implies, humans develop the disease after being bitten by an infected rat. Symptoms of rat-bite fever include skin rashes, joint discomfort, and fever, although, like the bubonic plague, rat-bite fever may be treatable with antibiotics after diagnosis.


Salmonella is another pathogen that rats and their excrement can carry. This virus can induce diarrhea and fever, similar to food poisoning but with more severe symptoms. It is rarely fatal, and most patients recover within a week; however, more severe instances may require IV fluids and antibiotics.

How Do Rodents Affect Our Health?

The collection of mouse and rat excrement can spread disease, taint food supplies, and cause allergic reactions in humans. When feces becomes dry, it becomes dangerous to individuals who breathe it in. In addition, mice and rats, like many other rodent species, have constantly growing incisors. As a result, they have an insatiable desire to chew to grind their teeth down.

Because of this, they will nibble on almost anything they can get their teeth on, including clothing, wires, pipes, floors, and a variety of other items. It can result in extensive property damage that is expensive to repair. Furthermore, it may be highly costly and even dangerous if they damage electrical cables or pipes. For these reasons, rodents are one of the worst pests, second only to termites and carpenter ants in terms of property destruction.

What Is The Safest Way To Handle Rodent Infestations?

Regular pest control by experts is the most straightforward, safest, and most efficient approach to preventing and eradicating mice and rats. Our professional pest control experts in San Jose offer year-round pest control services to keep rodents out of your home. We can also take care of any present rodent issues. To learn more or arrange an appointment, call (408) 417-1545 today.

Expel Exterminators LLC

3622 Tuers Road San Jose, CA 95121

(408) 417-1545

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