INFLUENCE OF ESSENTIAL OILS ON MICROORGANISMS BELONGING TO DIFFERENT TAXONS
IN COMPARISON WITH MODERN ANTIBIOTICS. REPORT III. EFFECTS OF ESSENTIAL OILS OF
LAVENDER, ROSEWOODTREE, EUCALYPTUS, FIR ON SOME GRAM-NEGATIVE BACTERIA 

Zhuchenko Elena Vladimirovna, Student, Penza State University (40 Krasnaya street, Penza, Russia), lenochek_zhuchenko@mail.ru
Semenova Elena Fedorovna, Candidate of biological sciences, professor, senior staff scientist, sub-department of general and clinical pharmacology, Penza State University (40 Krasnaya street, Penza, Russia), sef1957@mail.ru
Markelova Natalia Nikolaevna, Applicant, sub-department of general and clinical pharmacology, Penza State University (40 Krasnaya street, Penza, Russia), nataljamarkelova@yandex.ru
Shpichka Anastasia Iosifovna, Candidate of biological sciences, associate professor, sub-department of general and clinical pharmacology, Penza State University (40 Krasnaya street, Penza, Russia), ana-shpichka@yandex.ru
Knyaz’kova Anastasia Alekseevna, Student, Penza State University (40 Krasnaya street, Penza, Russia), sentemy@yandex.ru

579.222:(579.842+579.44):615.32:615.33

Background. In recent years medicinal plants and vegetable extracts have become more interesting because of their antibacterial activity. The carried out researches have shown an existing potential of essential oils usage to treat infectious human diseases. The aim of this study was to investigate antibacterial effects of essential oils of lavender, rosewoodtree, eucalyptus, fir on some Gram-negative bacteria in comparison with antibiotics.
Materials and methods. The 4 species of the opportunistic Gram-negative bacteria were studied. The antibiotic susceptibility to 5 samples of the essential oils was determined by the disk-diffusion method.
Results. The comparative estimation has revealed the bactericidal and bacteriostatic actions of the essential oils of Lavandula latifolia Medik. (L. spica DC.), Aniba rosaeodora Ducke, Eucalyptus viminalis Labill., E. globulus Labill., Abies sibirica Ledeb. on the tested hospital strains.
Conclusions. The antibacterial action of the essential oils with the certain component compositions on Stenotrophomonas maltophilia, Psеudomonas aeruginosa, Acinetobacter baumannii, Klebsiella pneumonia isolates has been shown and has different levels.

Lavandula latifolia Medik. (L. spica DC.), Eucalyptus viminalis Labill., E. globules Labill., Abies sibirica Ledeb., essential oil, opportunistic Gramnegative bacteria, antibacterial effects.

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