Zalm en voedselvergiftigingen*
Volgens een recent onderzoek van de Nederlandse Consumentenbond bevat 15 procent van de gerookte
zalm Listeria. De bond onderzocht 60 monsters van 20 merken. In 9 daarvan werd Listeria monocytogenes aangetroffen. Deze
bacterie kan ernstige ziekteverschijnselen veroorzaken, vooral bij bejaarden, zwangeren en jonge kinderen. Besmettingen met Listeria monocytogenes hebben in 2011 in Nederland het leven gekost aan 4 volwassenen. Daarnaast werd één kind doodgeboren en waren er 2 miskramen.
Volgens een laboratoriumstudie blijkt dat listeria goed bestreden lijkt te kunnen worden met extracten van het blad van de
johannesbroodboom. Een eerdere studie liet al zien dat
knoflook ook een goede bestrijder kan zijn.
Leaves Of Carob Tree Fight Food-Poisoning Bacteria
The latest episode in the American Chemical Society's (ACS') award-winning Global Challenges/Chemistry Solutions podcast series reports that an antibacterial extract from the leaves of the carob tree (the source of a popular chocolate substitute) could fight the microbe responsible for the serious form of food poisoning called listeriosis.
Based on a report by Pierluigi Caboni, Ph.D., Nadhem Aissani and colleagues in ACS' Journal of Agricultural and Food Chemistry.
In the new episode, Caboni explains that the increase in antibiotic-resistant bacteria, so-called superbugs, has fostered a search for new natural substances to preserve food and control disease-causing microbes. They cite a need for new substances to combat Listeria monocytogenes, bacteria that caused food poisoning outbreaks in a dozen states with at least three deaths last year.
Carob has attracted attention as a potential antibacterial substance, but until now, scientists had not tested it against Listeria. Carob may be best-known as a substitute for chocolate that does not contain caffeine or theobromine, which makes chocolate toxic to dogs.
Their report describes tests in which extracts of carob leaves proved effective in inhibiting the growth of Listeria bacteria growing in laboratory cultures. Further, it offers a possible explanation for the antibacterial action. The results were promising enough for the scientists to plan further tests of carob extracts on Listeria growing in meat and fish samples.
References:
American Chemical Society (Februari 2013)
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