Food poisoning can throw you off your feet for a few days, but after recovery, the disease is usually no longer reminds of itself. But a new study by scientists from Cornell University have shown that some types of Salmonella, which is one of the major bacterial causes of food poisoning can have long term effects on the body.
In some cases they can even lead to irreversible damage to DNA that makes people more vulnerable to disease in the future. Only in United States each year about one million people get food poisoning caused by Salmonella. Fortunately, typically, such poisoning quickly go away within a few days.
In the Cornell research center scientists have studied the serotype of Salmonella that cause typhoid fever. Typhoid is caused by the toxin S-CDT, a substance that is known to attack human cells, thus damaging DNA. Researchers have also studied other strains of Salmonella, including those that commonly cause food poisoning, and found that they may also contain S-CDT.
When the researchers tested the influence of such S-CDT-containing bacteria on lab-grown human cells, they found clear signs of DNA damage. While researchers have not fully explored all the consequences of such damage, but it is already known that after them the following cases of food poisoning can last longer.
“The consequences of DNA damage can be explained on the example of a sunscreen,” explains Rachel Miller, the study’s author: “If You don’t use sunscreen you can get sunburn – and, possibly, further development of skin problems under the sun. Same thing with the bacteria Salmonella: when DNA damage before its restoration a new damaged aggravate previous”.