June 18, 2024
This comprehensive guide describes the common and distinctive symptoms of listeria infection, covers what you should know about listeria contamination and how to avoid it, and explains why it's crucial to recognize the signs as soon as possible to keep yourself and others safe.


Listeria is a bacterial infection that can lead to severe health complications, and unfortunately, it’s not as rare as you might think. According to the Centers for Disease Control and Prevention (CDC), listeria affects around 1,600 people in the United States every year, and it’s deadly for one out of every five people who contract it. Knowing the symptoms of listeria and the steps you can take to avoid it can make a significant difference in keeping you and your loved ones safe.

5 Common Symptoms Of Listeria Infection: What You Need To Know

While listeria can affect everyone, the symptoms of the infection show up differently in each person. Some people experience mild symptoms, while others get more severe ones. Here are five of the most common symptoms of listeria:

  • Fever and chills: One of the first signs of listeria infection tends to be a high fever, usually over 100.6°F. Chill sensations are common as a result of the fever.
  • Muscle aches: Along with a fever, you might experience body aches, especially in the lower back or any affected muscle area.
  • Nausea and diarrhea: Nausea and diarrhea are common symptoms of many illnesses but can also occur with listeria infection.
  • Headaches: When you have listeria, you may experience severe headaches due to the inflammation of the brain and tissues around it.
  • Stiff neck: Another symptom of listeria involves a stiff neck that can often accompany a severe headache.

How To Recognize The Signs Of Listeria Contamination: A Guide

The bacteria that cause listeria can be present in soil, water, and food. The following are some of the most common foods that can cause listeria contamination:

  • Raw and unpasteurized milk and dairy products, cheeses made from raw milk
  • Uncooked meat, deli meats, and hot dogs
  • Refrigerated pates or meat spreads
  • Raw or smoked seafood
  • Raw vegetables that have been contaminated with listeria

Proper food handling and hygiene can go a long way in reducing the risk of listeria contamination. Here are some tips:

  • Wash all produce before eating or cooking.
  • Thoroughly cook all meat, poultry, and seafood before eating, making sure the internal temperature reaches at least 165°F.
  • Avoid consuming unpasteurized milk, cheese made from raw milk, or other unpasteurized dairy products.
  • Reheat leftovers to 165°F before eating.
  • Keep all kitchen surfaces and utensils clean and sanitized.

If you think you might have consumed contaminated food, monitor any symptoms that develop over the next few days. Early signs of listeria infection can show up two to four weeks after exposure, and severe cases can show symptoms up to four to six weeks later. Some people who get listeria do not experience symptoms until several months after infection.

The Top Warning Signs Of Listeria And How To Protect Yourself

While anyone can get listeria, it’s particularly dangerous for high-risk groups such as pregnant women, infants, older adults, and people with weakened immune systems. Here are some of the most effective ways to protect yourself and others:

  • Proper food handling: Make sure to always wash produce and cook meat and seafood thoroughly. Refrigerate any leftovers as soon as possible.
  • Be wary of certain foods: Avoid consuming anything that could potentially be contaminated with listeria, such as unpasteurized dairy products or refrigerated, ready-to-eat foods.
  • Know the warning signs: If you develop any of the above symptoms and are pregnant or have a weakened immune system, seek medical attention immediately.

Remember that listeria can be deadly and that early detection is essential. Call your healthcare provider if you suspect you might have contracted listeria and tell them about any recent food consumption, especially if you have any of the symptoms of the infection.

Listeria: Understanding The Symptoms And Risks For Your Health

When you have listeria, the bacteria can move from your gut into your bloodstream, and from there, it can affect many other parts of the body. High-risk groups such as pregnant women can experience severe complications, including miscarriage, stillbirth, or premature delivery. Older adults, newborns, and people with weakened immune systems can develop infections of the brain, blood, or spinal cord, which can lead to death.

It’s essential to know the symptoms of listeria infection and take the necessary precautions to avoid it. Knowing how to handle and prepare food properly is one of the most effective ways to protect yourself and others from listeria. With the right information and awareness, you can take proactive steps to stay healthy.

Don’t Ignore These 4 Signs Of Listeria Infection: They Could Save Your Life

While many symptoms can occur due to listeria, some significant signs to look out for include:

  • Sudden onset of a fever: If you begin to feel suddenly feverish, it could be a sign of listeria infection, especially if you have consumed any foods that could be contaminated.
  • Flu-like symptoms that don’t go away: If you have flu-like symptoms that last longer than usual and are getting worse over time, you should seek medical attention.
  • Changes in mental state: List based illnesses can affect the brain, resulting in confusion, disorientation, or changes in mood or behavior.
  • Pregnant women experiencing flu-like symptoms: Pregnant women should pay close attention to any signs of listeria infection, as it can increase the risk of complications such as miscarriage or stillbirth.

A Deep Dive Into Listeria Symptoms: What You Need To Look Out For

Here is a more detailed look at the symptoms discussed in previous sections and how they can present themselves:

  • Fever and chills: These are typical symptoms of almost any infection, but if they appear with no obvious cause, listeria could be responsible.
  • Muscle aches: You may experience lower back pain if the bacteria that cause listeria trigger inflammation here.
  • Nausea and diarrhea: Like fever and chills, these are common with many illnesses. Occurring alongside other symptoms of listeria, however, they can be a sign of infection.
  • Headaches: Most people can identify a typical headache and may struggle to differentiate it from a listeria headache. However, if flu-like symptoms, neck stiffness, or sensitivity to light or sound accompany it, you should suspect listeria.
  • Stiff neck: A stiff neck can indicate that meninges, the tissues surrounding the brain and spinal cord, have become inflamed. This usually is a sign of a severe case of listeria.

Listeria can present with other symptoms, including convulsions, alteration of mental status, balance and coordination, and other neurological symptoms. Understanding how the bacteria can lead to different types of symptoms can help you recognize when your illness is becoming more severe.


Listeria is a serious infection that can lead to severe complications and even death in high-risk groups. By knowing the symptoms of listeria and taking steps to avoid it, such as washing your produce before using it, cooking all meat and seafood thoroughly, and refrigerating leftovers promptly, you can protect yourself from the risk of contracting the disease. It’s essential to seek medical attention immediately if you experience any of the warning signs, especially if you are pregnant or belong to a high-risk group. Taking proactive steps to stay healthy can make a significant difference in keeping you and your loved ones safe from listeria infection.

Leave a Reply

Your email address will not be published. Required fields are marked *