Salmonella Food Poisoning

Salmonella food poisoning is also called salmonellosis, and is a severe but self-limiting infection of the digestive system. Most outbreaks of food poisoning are caused by Salmonella typhimurium and Salmonella enteritidis. Another species of Salmonella, S. typhi, is the causal agent of typhoid fever, a much more serious food-borne illness.
Salmonellosis develops after eating foods contaminated with Salmonella bacteria. Culprits include eggs (poultry is a carrier of the bacteria), minced meat and chicken, dairy products, cream-containing deserts, sandwich fillings and processed foods generally. The bacteria are killed quickly by heating to a temperature that exceeds 66 degrees Celsius, and the cells cannot divide below 4 degrees Celsius. Most cases of food contamination are therefore caused by inadequate storage of cooked food, or cross-contamination from raw foods.
Symptoms of Salmonellosis
The symptoms that develop within 12-36 hours of eating food containing Salmonella bacteria are the typical ones: nausea with vomiting, abdominal cramps and diarrhoea, which can be severe. The affected person also experiences chills and sweating and feels very tired and ill with, of course, no appetite. Not eating for a day or so does no harm while the symptoms subside but the real danger is that of dehydration. Someone with Salmonellosis is unable to drink even plain water without vomiting, and the very young and the very elderly are at high risk of losing more water than they can take in. When dehydration sets in, the body can go into shock and the food poisoning episode can be fatal.How Common Is Salmonellosis?
Extremely common. In the USA, around 80 million people are affected by Salmonella food poisoning every year and this costs the country about 15 billion dollars in lost working time. Processed foods are a particular danger – if something goes wrong at a food manufacturing plant, whole batches of food can become contaminated by Salmonella and many people can be affected before the source of the infection is traced. In January 2006, a leaky pipe at a chocolate factory in the UK contaminated the chocolate being made with Salmonella. Fifty six cases of food poisoning occurred before the products were withdrawn from the shops. Understandably, the manufacturer in question tried to keep the outbreak very quiet, and it was not reported until a few months later. Cases like this appear all over the worldSalmonella is probably less of a risk in the UK now because of the furore a few years ago about the bacteria being found in chickens and eggs. The campaign for Salmonella-free eggs was made famous by the politician Edwina Curry. Eggs and poultry today are checked regularly to make sure they do not contain large amounts of Salmonella. To be cautious, however, it is still recommended that eggs are scalded in boiling water for 5 seconds before they are cracked open for cooking since, if Salmonella is present, it is almost always on the shell.
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