Listeriosis is a potentially fatal sickness caused by consuming food infected with the bacteria Listeria monocytogenes. As per the CDC website, each year, an estimated 1,600 people contract listeriosis, with approximately 260 dying. Pregnant women, newborns, individuals 65 and older, and people with compromised immune systems are the most vulnerable to the virus.

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Listeriosis is typically a minor infection in pregnant women, but it can result in severe disease in the foetus or newborn baby. Some Listeria infections result in serious infections of the blood circulation system (producing sepsis) or the brain, most typically in seniors 65 and older and people with compromised immune systems (causing meningitis or encephalitis). Listeria infections often can spread to other parts of the body, such as bones, joints, and areas of the chest and abdomen.

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Listeriosis is typically caused by consuming Listeria monocytogenes-contaminated food. Listeria bacteria can transfer to the infant through the placenta if an infection occurs during pregnancy.

Most individuals with invasive listeriosis require hospitalisation, and one in every five people who contract the virus dies. Listeriosis during pregnancy can result in miscarriage, stillbirth, or neonatal mortality. Listeriosis during pregnancy causes foetal loss in approximately 20% of cases and infant death in approximately 3% of cases.

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Most years, a few occurrences of listeriosis are found. Even though the majority of listeriosis cases do not occur as part of a recognised outbreak, outbreak investigations can assist identify which foods are causes of listeriosis.

If one gets a fever and other indications of possible listeriosis, such as lethargy and muscular aches, within two months after eating potentially contaminated food, they are advised to seek medical attention and inform doctors. This is especially crucial if the patient is pregnant, over the age of 65, or has a compromised immune system.

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Most specialists say one does not require tests or treatment if they ate potentially contaminated Listeria-infected food and does not feel sick. If anyone has any queries regarding what to do after consuming potentially contaminated food, they are advised to immediately consult a doctor.