In Sweden around 4,000 people a year are infected with salmonella bacteria, with around 85 per cent picking up the infection abroad. The acute infection is generally followed by a lengthy period of stomach troubles such as diarrhoea, stomach ache, wind and constipation.
Probiotics are currently being trialled as a treatment for a number of different conditions, but few studies have investigated whether they have any effect on patients with salmonella.
The study included 163 salmonella patients, 90 per cent of whom had picked up the infection abroad. Half were treated with the probiotic lactic acid bacterium, while the other half were given powdered skimmed milk. The outcome was that the group on the probiotic did not have less diarrhoea or a shorter period with the salmonella bacteria in their gut.
"We could see that the men who were treated with the probiotic bacterium were less constipated than those who were given the powdered skimmed milk," says Lönnermark. "Whatever the treatment, the women felt ill to a greater extent and also had diarrhoea for longer than the men, though they got rid of the salmonella bacteria slightly more quickly."
There is a rising public interest in the role of gut bacteria in our health and how we can affect these bacteria by taking probiotics.
"The bacteria we have in our gut seem to be important for our health, and probiotic bacteria could ease and prevent various symptoms, but it's a matter of finding the right bacterium for the condition you're treating, and perhaps combining several different bacteria," says Lönnermark. "What's more, the effects can differ between women and men."PROBIOTICS
The thesis has been successfully defended.Publication Data
Authors: Elisabet Lönnermark, Vanda Friman, Georg Lappas, Torsten Sandberg, Anna Berggren, Ingegerd Adlerberth.
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