While several batches of cheeses are being recalled due to possible listeria contamination, find out what you need to know about this bacterium that can cause a serious infection. Coulommiers, brie, camembert… several cheeses sold in supermarkets should not be consumed if they are in your refrigerator. In question, a possible contamination with listeria. This bacterium can cause a rare but serious infection, listeriosis. In particular, it can lead to sepsis or infection of the central nervous system. It can also cause complications in pregnant women. Transmission of listeriosis Listeria monocytogenes is a bacterium widely distributed in the environment. It is found in soil, water, plants and in many animal reservoirs. Its peculiarity is that it can grow at low temperatures, in refrigerators and freezers. The most frequent mode of contamination in humans is the ingestion of contaminated food (dairy products and in particular soft cheeses and raw milk cheeses, cold cuts, sausage products, refrigerated sprouted seeds, etc.). Unlike other bacteria, listeria does not alter the taste of food. Symptoms of listeriosis After an incubation ranging from 10 to 28 days may manifest fever, headaches and digestive disorders (nausea, diarrhea, vomiting , etc). “Neurological complications (meningitis, encephalitis) can occur and jeopardize the vital prognosis of the person affected”, specifies the Ministry of Health. Some people can be infected without showing symptoms. In pregnant women, the infection can go unnoticed or be reduced to symptoms similar to those of the flu. However, it can have serious consequences for the unborn child (abortion, premature delivery, etc.).Read more Diagnosis of listeriosis The diagnosis is based on microbiological analyzes (blood samples, placenta, cerebrospinal fluid, etc.). In all cases, once the diagnosis has been made, the doctor or the medical analysis laboratory is obliged to inform the health authorities. Treatment of listeriosis Listeriosis can be treated with antibiotics. The earlier they are administered, the more effective they are. “However, the evolution can be fatal even in the event of appropriate and early treatment”, notes the Institut Pasteur. In France, the disease remains rare (incidence of 5 to 6 cases per million inhabitants), but can lead to death in 30 to 40% of cases occurring outside pregnancy.Prevention of listeriosisPrevention consists in avoiding certain food and to follow specific hygiene rules when preparing and storing food, such as washing hands and utensils thoroughly, cooking food thoroughly or respecting use-by dates and storage conditions.VIDEO – Salmonellosis: “Beware of mayonnaise and homemade chocolate mousse: after 24 hours in the fridge, they must be thrown away”
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