Which of the following drugs should be used when listeriosis is first suspected
Show Medically reviewed by Angelica Balingit, MD — Written by Kimberly Holland — Updated on March 1, 2022 Listeria infection, also known as listeriosis, is caused by the bacteria Listeria monocytogenes (L. monocytogenes). The Centers for Disease Control and Prevention (CDC) estimates that about 1,600 people in the United States get listeriosis each year. These bacteria are most commonly found in foods that include:
Listeriosis isn’t serious in most healthy people, who may never experience symptoms or complications of the infection. However, for some people, this infection can be severe or life threatening. Treatment depends on how severe the infection is and your overall health. Proper food safety can help reduce your risk of developing listeriosis. In most people, listeriosis can cause symptoms consistent with other foodborne illnesses. The most common symptoms are fever, with or without chills, and diarrhea. Other potential symptoms may include:
In this type of listeriosis, symptoms can begin within 24 hours after eating food that has been contaminated with high levels of Listeria bacteria. Overall, the illness is mild and goes away on its own, although diarrhea may last for up to 5 days. Invasive listeriosisIn some cases, listeriosis can spread outside your intestines. This more advanced infection, known as invasive listeriosis, causes more severe symptoms. These include: People with invasive listeriosis often do not experience the first symptoms until 1 to 4 weeks after exposure to Listeria bacteria. In some cases, it can take as long as 90 days for symptoms to appear. Invasive listeriosis is serious and can cause dangerous complications if left untreated. In pregnancyAccording to the American College of Obstetricians and Gynecologists, pregnant people are 10 times more likely to get listeriosis than the general population. Currently, scientists are unsure as to why pregnancy increases the risk of getting the infection. If you’re pregnant, you may not have any symptoms or the symptoms may be so mild that you don’t realize you have listeriosis. Additionally, as in invasive listeriosis, symptoms can take a while to show up, often between 19 to 28 days. This can make diagnosing listeriosis in pregnant people difficult. When present, the typical symptoms of listeriosis in a pregnant person are flu-like, including:
In newbornsA Listeria infection in a newborn can cause serious, often life threatening illness and complications. Symptoms of listeriosis in a newborn can include:
Listeriosis in newborns is divided into 2 categories:
The potential complications of listeriosis include: Listeriosis in pregnant people may lead to miscarriage, premature delivery, or stillbirth. According to the CDC, listeriosis during pregnancy results in fetal death about 20 percent of the time. In cases where the baby survives, they may develop a serious infection of the brain, blood, or lungs. This can cause lifelong health problems, such as seizures, paralysis, or intellectual disability. Listeriosis develops after you come into contact with the bacteria L. monocytogenes. Most commonly, a person gets listeriosis after eating contaminated food. A newborn can also get it from their mother. Listeria bacteria live in soil, water, and animal feces. They can also live on food, on food production equipment, and in cold food storage. Listeriosis is commonly spread by:
Listeria bacteria can still grow in cold environments, such as refrigerators, although they don’t grow as quickly. They can also survive freezing temperatures, which means that they can be present in frozen foods that have been thawed. A 2020 study collected samples of frozen fruit and vegetables from retail and catering locations. Researchers were able to detect L. monocytogenes in 10 percent of the frozen vegetables. Some of the bacterial strains matched those that had caused previous infections in people. These bacteria are more likely to be destroyed by heat. Heating processed foods, like hot dogs, to 165°F (73.8°C) will kill the bacteria. Healthy people will rarely become ill because of Listeria. If you do, the illness is typically mild and goes away on its own. Those at an increased risk of serious illness or complications from listeriosis include: A variety of foods have been previously linked to Listeria outbreaks. If you’re at an increased risk of serious illness or complications due to listeriosis, use caution with the following types of foods or avoid them altogether. Soft cheesesSoft cheeses are produced from milk that hasn’t been pasteurized. Pasteurization is a process that helps kill potentially harmful microbes in certain types of foods. Some examples of soft cheeses include:
To see if a specific cheese is pasteurized, check the label. It should say something along the lines of “made with pasteurized milk.” If you’re in doubt about whether or not a product is pasteurized, it’s best not to buy it. Raw milkRaw milk hasn’t been pasteurized to kill harmful microbes. Keep in mind that raw milk can also be used to make other dairy products like cheese, yogurt, and ice cream. Similar to soft cheeses, check the product label to see if a product is made with pasteurized milk. Ready-to-eat meatsListeria can potentially be found in several different types of ready-to-eat meat products. These include:
If you’re at risk of serious listeriosis, it’s generally best to avoid these items unless they’ve been cooked to a safe temperature, such as 165°F (73.8°C). Pâtés, meat spreads, or smoked fish that are shelf-stable are typically safer. Shelf-stable means that an item can be stored at room temperature prior to opening. A good rule of thumb is to avoid selecting items found in the refrigerated section of the store. Raw fruits and vegetablesSince Listeria can be found on raw fruits and vegetables, be sure to wash or scrub these foods under running water before preparing or eating them. This is important even if you don’t plan on eating the skin or peel, as bacteria found on the peel can get into the food as you prepare it. For melons in particular, take steps to consume them safely. Aim to eat cut melon right away. Otherwise, store it safely in a refrigerator. Throw away any remaining cut melon in your refrigerator after a week has passed. Raw sproutsRaw sprouts can harbor Listeria as well as a variety of other bacteria like Escherichia coli (E. coli) and Salmonella. Unlike other types of fresh vegetables, washing raw sprouts isn’t effective at removing bacteria. If you’re at risk of severe listeriosis, make sure any sprouts are thoroughly cooked before eating them. Avoid consuming sprouts that are raw or even lightly cooked. If you’re otherwise healthy and have eaten food that may have been contaminated with Listeria, monitor yourself for symptoms. Pay close attention to any signs of infection, such as a fever or flu-like symptoms. In most cases, symptoms are mild and last only a few days. However, if symptoms persist and illness does not improve after 5 days, make an appointment with your doctor. A person should also seek medical help at once if symptoms of listeriosis occur:
Be ready to describe any symptoms to the doctor and give details about the food and when the person ate it. Your doctor will likely use a bacterial culture test to diagnose listeriosis. This involves seeing if Listeria bacteria grow from a sample of blood, cerebrospinal fluid, or placenta. Treatment for listeriosis depends on how severe your symptoms are and your overall health. If your symptoms are mild and you are otherwise in good health, treatment may not be necessary. Instead, your doctor may instruct you to stay home and care for yourself with close follow-up. Home treatment for listeriosis is similar to treatment for any foodborne illness. To treat a mild infection at home, you can:
Medical treatmentsFor more severe cases of listeriosis, your doctor will prescribe antibiotics. These are drugs that kill bacteria or slow their growth. Some types of antibiotics that are commonly used for listeriosis include ampicillin and trimethoprim-sulfamethoxazole (Bactrim). If you have invasive listeriosis, you’ll likely need to stay in the hospital and be treated with intravenous (IV) medications. Antibiotics through an IV can help eliminate the infection, and the hospital staff can watch for complications. Treatment in pregnancyIf you’re pregnant and have listeriosis, your doctor will want you to begin treatment with antibiotics. They’ll also monitor your baby for signs of distress. Newborn babies with an infection will receive antibiotics as soon as they’re born. Recovery from a mild infection may be quick and you should feel back to usual within a few days. If you have a more advanced infection, recovery depends on the severity of the infection. Generally, prompt treatment with an antibiotic can reduce symptoms and help prevent complications. If your infection becomes invasive, recovery may take longer. You may also need to stay in the hospital during part of your recovery so you can have IV antibiotics and fluids. A newborn with listeriosis may need antibiotics for several weeks while their body handles the infection. This will likely require the newborn to remain in the hospital. Late onset listeriosis typically has a better outlook than early onset listeriosis. Practicing food safety measures is the best way to prevent listeriosis. To do this, follow the tips below:
Listeriosis is a bacterial infection that’s typically transmitted by eating contaminated food. Some examples include soft cheeses, deli meats, and raw fruits and vegetables. While listeriosis may cause mild illness in healthy people, it can have a serious effect on others. These include pregnant people, older adults, and people with a weakened immune system. Pregnant people can also pass the infection to their baby, leading to serious illness or death. The best way to prevent listeriosis is to follow good food safety practices when handling, cooking, or eating food. Additionally, those that are at risk of serious illness should aim to avoid foods that are frequently associated with listeriosis. Last medically reviewed on March 1, 2022 |