1. Composition for use in the treatment of bacterial infections, containing a concentrate or extract of oregano (origanum) in combination with at least one concentrate or extract of another plant. The composition for use according to claim 1, characterized in that the concentrate or extract is a concentrate or extract from the aerial parts of the plant. The composition for use according to claim 1, characterized in that the plant is selected from plants of the family Apiaceae, Armaranthaceae, Rosaceae, Grossulariaceae, Asteraceae, Cistaceae, Lamiaceae, Fabaceae and Elaeagnaceae. 4. The composition for use according to claim 3, characterized in that the plant is selected from the genus Aegopodium, Salicornia, Chenopodium, Cydonia, Sorbus, Ribes, Cichorium, Cistus, Geum, Sideritis, Cicer, Hippophae and Prunus. 5. The composition for use according to claim 4, characterized in that the edible plant is selected from Aegopodium podagraria, Chenopodium bonus-henricus, Sorbus terminalis, Ribes nigrum, Ribes rubrum, Cistus incanus, Cydonia oblonga, Cichorium intybus, Salicornia europaea, Geumha rhamumhamippum , Sideritis scardica, Cicer arietinum and Prunus spinosa. 6. Composition for use according to any one of paragraphs. 1-5, characterized in that the bacterial infection is caused by pathogenic bacteria. 7. The composition for use according to claim 6, characterized in that the pathogenic bacteria are selected from the genera Staphylococcus, Streptococcus, Pseudomonas, Escherichia, Salmonella, Helicobacter, Neisseria, Campylobacter, Chlamydia, Clostridium, Vibrio, Triponema, Mycobomyeractium, Borocentella Bacterium, Mycobacterium bacterium , Borrelia, Brucella, Corynebacterium, Diplococcus, Enterobacter, Fusobacterium, Leptospira, Listeria, Pasteurella, Proteus, Rickettsia, Shigella, Sphaerophorus, Yersinia, or combinations thereof. 8. The composition for use according to claim 6, characterized in that the bacteria are resistant to antibiotics. The composition for use acc
