Naturopathy: With coriander against bacteria



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Coriander oil reduces bacterial growth and could become a new agent against resistant germs

Coriander oil has an antibacterial effect as a plant-based active ingredient and could make a significant contribution to combating antibiotic-resistant pathogens in the future, Portuguese researchers report in the current issue of the journal "Journal of Medical Microbiology".

The natural ingredients of coriander generally have an inhibitory effect on the growth of bacteria and also have an antibacterial effect on particularly dangerous multi-resistant pathogens, such as the so-called methicillin-resistant Staphylococcus aureus (MRSA) from the genus Staphylococci, explain Fernanda Domingues from the University of Beira Interior and colleagues. In addition, the coriander oil protects against food poisoning due to its antibacterial effect, the Portuguese scientists continue.

Coriander oil as a natural active ingredient against bacteria As part of their study, the researchers led by Fernanda Domingues investigated the effect of coriander oil on twelve different strains of bacteria, including the relatively common intestinal germs of Escherichia coli and the particularly dangerous multi-resistant hospital germs MRSA. The scientists determined, among other things, the concentration in which the vegetable oil reduces bacterial growth and the concentration in which the coriander oil causes the bacteria to die. The scientists also investigated the effects of coriander oil on the basic functions of the bacteria (e.g. cellular respiration). The scientists compared the results of the individual research steps with the results of a control group in order to be able to assign the effects of the coriander oil exactly. The Fernanda Domingues and colleagues found that coriander oil caused a significant inhibition of growth in all of the bacterial cultures examined, even at a concentration of 1.6 percent. However, according to the experts, it was even more astonishing that the oil was fatal even in low concentrations in ten of the twelve strains examined - even with the antibiotic-resistant MRSA pathogens.

Coriander in naturopathy According to Fernanda Domingues and colleagues, earlier studies had already shown signs of an antibacterial effect of coriander oil before the current study. In the beginning, the so-called linalool contained in the spice was particularly effective against microorganisms, but as the current study by the Portuguese researchers confirms, the antimicrobial effect of the coriander oil apparently goes back to a complex interplay of the contained ingredients (ingredients). The essential oil of coriander contains, among other things, linalool, geraniol, α- and β-pinene, limonene, geranyl acetate, α- and γ-terpinene and borneol, the interplay of which causes a reduction or death of the bacterial cultures. In ancient medicine, coriander was used by the Egyptians in ancient times to treat a wide variety of diseases. For example, the Egyptians used the essential oils to stimulate appetite, promote digestion, treat cramps and care for patients with gastrointestinal disorders and abdominal pain. In particular, the positive effects of gastrointestinal problems caused by bacteria have also benefited from conventional medicine and developed appropriate medications based on the substances in coriander oil.

Antibacterial effects of coriander oil even on multi-resistant germs. With their current investigation, the Portuguese researchers have shown another possible application of coriander oil. In the future, medicine could use the antibacterial effect of vegetable oil to combat any form of bacterial infection and also to develop an effective active ingredient against antibiotic-resistant pathogens. The effects of coriander oil on the important cell functions of the bacteria open up completely new perspectives in the fight against the increasingly widespread multi-resistant pathogens, the researchers at Fernanda Domingues report. Their “results indicate that coriander oil destroys the membrane that surrounds the bacterial cell. This destroys the barrier between the cell and its surroundings and inhibits essential processes such as breathing, "which" ultimately leads to the death of the bacterial cell ", emphasized the scientists at the University of Beira Interior. (fp)

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Image: Gerd Altmann / pixelio.de

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