Unveiling the impact of selected essential oils on MRSA strain ATCC 33591: antibacterial efficiency, biofilm disruption, and staphyloxanthin inhibition
This work aimed to evaluate the effects of 4 selected essential oils on planktonic cells and microbial biofilms of the Staphylococcus aureus strain (MRSA ATCC 33591). The antibacterial activities of the four essential oils Geranium ( Pelargonium graveolens), PgEO , Tea Tree ( Melaleuca alternifolia...
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Published in | Brazilian journal of microbiology Vol. 55; no. 3; pp. 2057 - 2069 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Cham
Springer International Publishing
22.05.2024
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | This work aimed to evaluate the effects of 4 selected essential oils on planktonic cells and microbial biofilms of the
Staphylococcus aureus
strain (MRSA ATCC 33591). The antibacterial activities of the four essential oils Geranium (
Pelargonium graveolens), PgEO
, Tea Tree (
Melaleuca alternifolia
)
MaEO
, Lemon peel (
Citrus limon
)
ClEO
and Peppermint (
Mentha piperita) MpEO
had MICs ranging from 1.56 to 12.5 µl/ml. The evaluation of the antibiofilm activities of the 4 EOs revealed that they had antiadhesive activities against
S. aureus
MRSA biofilms; the activity reached 60% (the EO of
MpEO
peppermint at a concentration of 3.12 µl/ml), and the eradication activity was 80% (the EO of
PgEO
and
MpEO
at 3.12 µl/ml). The antibiofilm activity of
S. aureus
has been explained by the binding of several essential oil bioactive molecules to the SarA protein, the main target protein involved in biofilm formation. The synthesis of the virulence factor staphyloxanthin by
S. aureus
MRSA ATCC 33591 was significantly inhibited in the presence of
PgEO
at a concentration of MIC/2. This inhibition was explained by the binding of the main
PgEO
molecules (β-citronellol and geraniol) to the CrTM protein involved in the staphyloxanthin synthesis pathway. There is evidence that these essential oils could be used as potential anti-virulents to control
Staphylococcus
biofilm formation. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1517-8382 1678-4405 1678-4405 |
DOI: | 10.1007/s42770-024-01374-2 |