Oregano

Origanum vulgare L.

Note: The subspecies Origanum vulgare subsp. hirtum (Greek Oregano) is considered the most medicinally potent due to highest carvacrol content.

Common & Folk Names

• Wild Marjoram
• Greek Oregano
• Winter Marjoram
• Mountain Joy
• Common Oregano
• European Oregano

Plant Family

Lamiaceae (Mint family)

Geographic Location

Native to Europe, the Mediterranean region, and temperate Asia. Widely naturalised and cultivated worldwide including New Zealand. Thrives in Mediterranean climate zones.

Habitat

Dry, rocky, calcareous (limestone-rich) soils in sunny grasslands, mountain slopes, scrubland, and woodland edges. A xerophytic (drought-tolerant) plant that prefers well-drained, alkaline conditions. Often found on hillsides and mountainous terrain in its native range.

Growing Conditions

Sun: Requires full sun (6+ hours daily) for optimal essential oil production

Soil: Thrives in well-drained, lean to moderately fertile, slightly alkaline soil (pH 6.5-8.0); poor soil often produces more aromatic, medicinally potent plants with higher essential oil content

Propagation: Easily grown from seed sown in spring, or by division of established clumps in spring or autumn, or from softwood cuttings in early summer

Hardiness: Perennial in USDA Zones 4-10; cold-hardy but prefers warmer climates. In New Zealand, grows well throughout both islands as a hardy perennial

Care: Minimal water once established (drought-tolerant); trim back after flowering to encourage bushier growth; avoid over-fertilising as this reduces essential oil concentration

NZ Planting Calendar

Sowing (seeds): Spring (September–November) – slow to germinate

Propagation (cuttings): Spring to summer (October–February) – softwood or semi-hardwood cuttings

Propagation (division): Spring (September–November) or autumn (March–May)

Planting: Spring (September–November) after frost danger passes

Flowering: December–February (summer)

Harvest (leaves): Year-round; best just before or during flowering for maximum oil content

Note: Not native to NZ; perennial in most areas but may be treated as annual in coldest regions; Mediterranean herb requiring good drainage

Harvesting Guidelines

Harvest the aerial parts (leaves and flowering tops) just as the plant begins to flower, typically in mid-summer (December-January in NZ), when volatile oil content is at its peak. Harvest on a sunny, dry day after morning dew has evaporated but before midday heat. Cut the top third of stems, leaving lower growth for regrowth. For fresh use, harvest as needed. For drying, bundle stems and hang upside down in a warm (21-29°C), dark, well-ventilated area, or use a dehydrator at low temperature (35-40°C) to preserve volatile oils. Properly dried oregano should be crispy and retain bright green-brown color and strong aroma. Store dried herb in airtight containers away from light and heat.

Parts Used

• Aerial parts (leaves and flowering tops)
• Essential oil (steam-distilled from aerial parts)

Constituents & their Actions

Oregano’s medicinal potency is directly linked to its phenolic volatile oil content, particularly carvacrol and thymol. Composition varies significantly between subspecies, growing conditions, and harvest timing.

Phenolic Volatile Oils (0.5-4% of fresh plant, 1-5% of dried plant):

These are the primary medicinal constituents responsible for oregano’s potent antimicrobial effects. Main phenolic compounds include:

Carvacrol (typically 30-80% of essential oil in medicinally potent varieties):
The dominant therapeutic compound in oregano, particularly in O. vulgare subsp. hirtum. A monoterpenoid phenol with extraordinary antimicrobial properties.

Thymol (typically 1-20% of essential oil):
A phenolic isomer of carvacrol with similar but complementary antimicrobial, antifungal, and expectorant properties.

The main actions of carvacrol and thymol are:

• Broad-spectrum antimicrobial: Highly effective against bacteria (including antibiotic-resistant strains like MRSA), viruses, fungi, and parasites
• Antibiofilm activity: Disrupts and prevents bacterial biofilm formation
• Antifungal: Potent activity against Candida species and other pathogenic fungi
• Antioxidant: Among the most potent natural antioxidants measured
• Anti-inflammatory: Inhibits pro-inflammatory cytokines and enzymes
• Expectorant: Promotes mucus clearance from respiratory tract

Monoterpene Hydrocarbons (Supporting compounds in essential oil):

These compounds work synergistically with phenolic compounds and contribute to oregano’s overall medicinal activity. Main monoterpenes include:

• p-Cymene (typically 3-15% of essential oil) – precursor to carvacrol biosynthesis
• γ-Terpinene (typically 2-10%)
• α-Pinene (typically 1-5%)
• β-Myrcene (typically 1-5%)
• Sabinene (variable, higher in some chemotypes)
• Limonene (trace to 3%)

The main actions of these monoterpenes are:

• Anti-inflammatory: p-Cymene demonstrates significant anti-inflammatory activity
• Analgesic: Pain-relieving properties, especially p-cymene
• Antioxidant: Contribute to overall free radical scavenging capacity
• Antimicrobial synergists: Enhance the activity of carvacrol and thymol

Flavonoids:

Polyphenolic compounds contributing to antioxidant and anti-inflammatory effects. Main flavonoids include:

• Apigenin
• Luteolin
• Quercetin
• Kaempferol
• Eriodictyol

The main actions of these flavonoids are:

• Antioxidant: Scavenge free radicals and protect against oxidative stress
• Anti-inflammatory: Modulate inflammatory pathways
• Anxiolytic (mild): Apigenin demonstrates mild calming effects on the nervous system

Phenolic Acids:

Important water-soluble antioxidant and anti-inflammatory compounds. Main phenolic acids include:

Rosmarinic Acid (major phenolic acid):
A powerful antioxidant and anti-inflammatory compound also found in rosemary, sage, and other Lamiaceae family members.

Other phenolic acids:

• Caffeic acid
• Ferulic acid
• p-Coumaric acid

The main actions of phenolic acids are:

• Antioxidant: Potent free radical scavenging
• Anti-inflammatory: Rosmarinic acid specifically inhibits 5-lipoxygenase and reduces leukotriene production
• Antimicrobial synergists: Enhance overall antimicrobial effects

Tannins (Condensed):

Present in moderate amounts, contributing astringent properties.

The main action of tannins is:

• Astringent: Toning and tightening effect on tissues

Triterpenes and Other Compounds:

Including ursolic acid, oleanolic acid, and various sterols (β-sitosterol) present in smaller amounts.

Actions with Mechanisms

Antimicrobial/Antibiotic (Primary and Most Potent Action):
Carvacrol and thymol demonstrate extraordinarily potent broad-spectrum antimicrobial activity against bacteria, fungi, viruses, and parasites through multiple synergistic mechanisms. The phenolic structure allows these compounds to integrate directly into microbial cell membranes, disrupting membrane integrity by increasing permeability, which in turn causes leakage of essential cellular contents (potassium ions, ATP, proteins) leading to rapid cell death. Additionally, carvacrol and thymol disrupt the proton motive force across bacterial membranes by dissipating the pH gradient, which in turn inhibits ATP synthesis and collapses energy production. The compounds also denature membrane and cytoplasmic proteins, which in turn further compromises cellular function. Critically, oregano essential oil demonstrates potent activity against antibiotic-resistant bacteria including methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci, and multidrug-resistant Acinetobacter baumannii, Pseudomonas aeruginosa, and Escherichia coli strains isolated from clinical settings, which in turn makes it a promising adjunct or alternative to conventional antibiotics in an era of increasing antimicrobial resistance.

Antibiofilm Activity (Critical for Chronic Infections):
Bacterial biofilms–complex communities of bacteria encased in protective extracellular matrices–are notoriously resistant to conventional antibiotics and responsible for chronic, persistent infections. Carvacrol and oregano essential oil both prevent biofilm formation and disrupt established biofilms of Staphylococcus aureus, S. epidermidis, Pseudomonas aeruginosa, E. coli, Listeria monocytogenes, and other pathogens at concentrations similar to or lower than their minimum inhibitory concentrations (MICs) against planktonic cells. The mechanisms include: interfering with quorum sensing (bacterial cell-to-cell communication that triggers biofilm formation), which in turn prevents the coordinated switch to biofilm growth; disrupting the polysaccharide intercellular adhesin (PIA) matrix that holds biofilms together, which in turn causes biofilm disintegration; and directly killing bacteria embedded within biofilms by penetrating the matrix, which in turn provides access to sessile cells that are typically protected from antimicrobials.

Antifungal (Potent and Broad-Spectrum):
Oregano essential oil, carvacrol, and thymol demonstrate powerful activity against pathogenic fungi including Candida albicans, C. glabrata, Aspergillus species, Cryptococcus neoformans, and dermatophytes. The mechanism involves disruption of fungal cell membrane integrity, which in turn causes leakage of cellular contents and cell death, similar to antibacterial mechanisms. Additionally, carvacrol interferes with ergosterol biosynthesis (the primary sterol in fungal cell membranes), which in turn compromises membrane structure and function. This makes oregano particularly valuable for systemic and topical fungal infections including oral and vaginal candidiasis, athlete’s foot, and nail fungus.

Antioxidant (Among the Highest Measured in Herbs):
Oregano consistently ranks among the herbs with the highest antioxidant capacity as measured by ORAC (Oxygen Radical Absorbance Capacity) and other assays, often exceeding blueberries, dark chocolate, and other foods promoted for antioxidant content. The combination of carvacrol, thymol, rosmarinic acid, flavonoids, and other phenolic compounds work synergistically to neutralise multiple types of reactive oxygen species (ROS) including hydroxyl radicals, superoxide anions, and peroxyl radicals through direct radical scavenging, which in turn protects cellular lipids, proteins, and DNA from oxidative damage. Additionally, oregano compounds upregulate endogenous antioxidant enzymes including superoxide dismutase (SOD), catalase, and glutathione peroxidase, which in turn enhances the body’s own antioxidant defense systems. This powerful antioxidant activity supports cardiovascular health, neuroprotection, and overall cellular protection against aging and disease.

Anti-inflammatory (Multi-Pathway Inhibition):
Carvacrol, thymol, p-cymene, and rosmarinic acid inhibit multiple inflammatory pathways through complementary mechanisms. They suppress the production and release of pro-inflammatory cytokines including tumor necrosis factor-alpha (TNF-α), interleukin-1β (IL-1β), and interleukin-6 (IL-6) from activated immune cells, which in turn reduces systemic and local inflammatory responses. The compounds inhibit cyclooxygenase-2 (COX-2) and 5-lipoxygenase (5-LOX) enzymes, which in turn reduces production of pro-inflammatory prostaglandins and leukotrienes. Rosmarinic acid specifically blocks the 5-LOX pathway, which in turn is particularly valuable for allergic and inflammatory respiratory conditions. Additionally, oregano compounds inhibit the NF-κB (nuclear factor kappa B) transcription factor, a master regulator of inflammatory gene expression, which in turn prevents the cellular production of multiple inflammatory mediators simultaneously. These combined anti-inflammatory mechanisms make oregano valuable for arthritis, inflammatory bowel conditions, and allergic inflammation.

Expectorant and Respiratory Support:
The volatile phenolic compounds (carvacrol, thymol) are partially excreted through the lungs after absorption, which in turn provides direct antimicrobial and anti-inflammatory effects within the respiratory tract. These compounds stimulate secretion of respiratory tract fluid and promote ciliary action, which in turn helps loosen and expel mucus from bronchi and lungs. The antimicrobial effects directly combat respiratory pathogens including Streptococcus pneumoniae, Haemophilus influenzae, and viral pathogens, which in turn makes oregano valuable for bronchitis, pneumonia, and upper respiratory infections.

Antiparasitic:
Research demonstrates activity against intestinal parasites including Giardia lamblia, Blastocystis hominis, and Entamoeba histolytica, though clinical evidence in humans is limited. The mechanism likely involves membrane disruption similar to antibacterial effects.

Carminative and Digestive Stimulant:
The aromatic volatile oils stimulate digestive secretions and promote healthy gut motility, which in turn relieves gas, bloating, and digestive discomfort. The antimicrobial effects may help rebalance gut flora by selectively inhibiting pathogenic bacteria while having less impact on beneficial species.

Main Use

Oregano’s primary medicinal application is as a potent, broad-spectrum antimicrobial herb for bacterial, fungal, viral, and potentially parasitic infections, particularly valuable given increasing antibiotic resistance.

Internally:

• Acute and chronic bacterial infections (respiratory, gastrointestinal, urinary tract)
• Antibiotic-resistant bacterial infections as adjunct therapy (under professional supervision)
• Fungal infections including oral and intestinal candidiasis
• Respiratory infections: bronchitis, pneumonia, sinusitis, colds, flu
• Gastrointestinal infections including food poisoning, traveler’s diarrhea
• Intestinal dysbiosis and SIBO (small intestinal bacterial overgrowth)
• As antimicrobial support during and after antibiotic treatment
• Parasitic infections (under professional guidance)

Topically:

• Fungal skin infections: athlete’s foot, ringworm, nail fungus
• Bacterial skin infections and wound infections
• Acne (antibacterial and anti-inflammatory)
• Oral infections: gingivitis, mouth ulcers (diluted as mouthwash)

Important Note: Due to oregano’s potent antimicrobial effects, it is typically used for short courses (1-3 weeks) to address acute infections. Extended use may disrupt beneficial gut flora. Follow treatment with probiotics to restore healthy microbiome.

Preparations

Tea/Infusion: 1-2 teaspoons (2-4 grams) of dried oregano leaf per cup of boiling water, steep covered for 10-15 minutes. Drink 2-3 cups daily for acute infections. The tea provides moderate essential oil content plus water-soluble compounds like rosmarinic acid

Tincture (Fresh or Dried Herb): Fresh plant 1:2 in 60-70% alcohol, or dried plant 1:5 in 50-60% alcohol. Higher alcohol content needed to extract essential oils. Dose: 2-5 mL, 3 times daily

Essential Oil (INTERNAL USE – Use with extreme caution): Oregano essential oil is highly concentrated and potentially irritating. Internal use should only be under professional guidance. Typical dose if used internally: 1-3 drops in capsule or heavily diluted in carrier oil, 1-3 times daily, for short duration only. NEVER take undiluted essential oil internally

Essential Oil (TOPICAL USE): Always dilute essential oil before topical application – typically 2-5% dilution in carrier oil (20-50 drops per 30 mL carrier oil like olive, coconut, or jojoba oil). Apply to affected areas 2-3 times daily. For foot fungus, 3-5% dilution can be used

Essential Oil (STEAM INHALATION): Add 2-3 drops to bowl of hot water, cover head with towel, and inhale steam for respiratory infections. Use 1-2 times daily

Culinary Use: Fresh or dried oregano used liberally in cooking provides mild medicinal benefits while enhancing food safety through antimicrobial effects

Capsules/Tablets: Commercial standardised oregano extracts and encapsulated oil products are available. Follow manufacturer’s dosing guidelines, typically 150-600 mg extract or 50-150 mg essential oil in enteric-coated capsules, 1-3 times daily

Dosage

Dried Herb (Tea): 2-4 grams, 2-3 times daily

Tincture (1:5 in 50-60% alcohol): 2-5 mL, 3 times daily

Fresh Herb (Culinary/Therapeutic): 2-4 teaspoons chopped fresh oregano in food or tea daily

Essential Oil (INTERNAL – professional guidance only): 1-3 drops in capsule, 1-3 times daily, maximum 1-2 weeks without break

Essential Oil (TOPICAL – diluted): 2-5% dilution applied to affected area, 2-3 times daily

Duration: For acute infections, use for 7-14 days. For chronic conditions, cycle use (2 weeks on, 1 week off) and include probiotic support. Maximum continuous internal use of concentrated preparations: 3 weeks.

Safety & Drug Interactions

Scientific Evidence

Antimicrobial Activity Against MRSA and Resistant Pathogens: Multiple studies (Nostro et al., 2004; Lu et al., 2018) demonstrate potent antimicrobial activity of oregano essential oil, carvacrol, and thymol against methicillin-resistant Staphylococcus aureus (MRSA) and other multidrug-resistant clinical isolates including Acinetobacter baumannii, Pseudomonas aeruginosa, and resistant E. coli strains. MIC values range from 0.08-0.64 mg/mL depending on strain and oil composition. Carvacrol shows equal or superior activity against antibiotic-resistant and antibiotic-susceptible strains, suggesting different mechanisms of action from conventional antibiotics.

Antibiofilm Activity: Research (Nostro et al., 2007; multiple subsequent studies) confirms oregano essential oil and isolated carvacrol effectively prevent biofilm formation and disrupt established biofilms of S. aureus, S. epidermidis, P. aeruginosa, and E. coli at concentrations similar to their planktonic MICs. This is critical as biofilm-associated bacteria are 100-1000 times more resistant to antibiotics than planktonic cells. Carvacrol targets quorum sensing and disrupts extracellular matrix components.

Respiratory Pathogen Activity: Studies on oregano essential oils demonstrate potent activity against respiratory pathogens including Haemophilus influenzae, H. parainfluenzae, and Streptococcus pneumoniae with MIC values as low as 0.15 mg/mL. The carvacrol chemotype shows largest zones of inhibition against these pathogens, supporting traditional use for respiratory infections.

Antifungal Activity: Research (Manohar et al., 2001; Adam et al., 1998) confirms potent antifungal activity against Candida albicans and other pathogenic fungi both in vitro and in vivo. Mechanisms include membrane disruption and inhibition of ergosterol biosynthesis.

Antioxidant Capacity: Oregano consistently ranks among the highest measured antioxidant capacity in herbs using ORAC and other assays. Carvacrol, thymol, and rosmarinic acid are identified as primary contributors. The antioxidant activity translates to protective effects in various oxidative stress models.

Anti-inflammatory Effects: Animal studies (Lima et al., 2013; multiple others) demonstrate significant anti-inflammatory and analgesic effects of oregano essential oil in models of inflammation, edema, arthritis, and pain. Mechanisms include COX and LOX inhibition and suppression of pro-inflammatory cytokines.

Synergistic Effects with Antibiotics: Research suggests carvacrol and thymol may work synergistically with certain antibiotics, potentially reducing required antibiotic doses or restoring antibiotic sensitivity in resistant strains.

Western Energetics

Temperature: Warming/Hot. Oregano has pronounced warming properties, stimulating circulation and metabolism. Indicated for “cold” conditions and contraindicated in “hot” inflammatory states.

Moisture: Drying. The aromatic volatile oils and astringent tannins have drying properties, useful for “damp” conditions with excess mucus, but may aggravate “dry” conditions if used in excess.

Tissue State: Primarily indicated for:

Atonic (Weak, Deficient): Stimulates and strengthens weak tissues and functions, particularly digestive and immune systems

Damp/Congestive: The warming, drying, aromatic qualities clear dampness, particularly in respiratory and digestive systems

Septic (Infected): Primary indication – potent antimicrobial effects for infected tissues

Taste

Pungent: The dominant taste from phenolic volatile oils (carvacrol, thymol) indicates oregano’s warming, stimulating, dispersing, antimicrobial qualities. The sharp, penetrating pungency relates to its ability to clear infections, move stagnation, and warm cold conditions.

Bitter: A perceptible bitter taste from phenolic compounds supports oregano’s antimicrobial, anti-inflammatory, and digestive-stimulating properties. The bitter quality triggers digestive secretions and supports detoxification.

Slightly Aromatic-Sweet: The aromatic quality from volatile oils indicates the dispersing, carminative nature and uplifting effect on mood and digestion.

Plant Lore

The name “Oregano” derives from the Greek oros (mountain) and ganos (joy or brightness), translating to “joy of the mountain” or “mountain brightness,” reflecting both its natural mountainous habitat and the beauty of its purple-pink flowering hillsides in Mediterranean regions.

In ancient Greek mythology, Aphrodite, goddess of love, was said to have created oregano as a symbol of joy and happiness. Greek and Roman bridal couples were crowned with wreaths of oregano to bring blessings and happiness to their marriage. The herb was planted on graves to bring peace and joy to departed spirits in their journey to the afterlife.

Oregano has been used since classical antiquity as both culinary spice and medicine. Dioscorides (1st century CE) described its use for poisonings, convulsions, and dropsy (edema). Hippocrates used oregano as an antiseptic and for digestive and respiratory ailments. The plant was valued for protection against venomous bites and was believed to neutralise poisons.

During the Middle Ages, oregano was used throughout Europe as a strewing herb (scattered on floors) for its antiseptic and aromatic properties. It was included in nosegays and pomanders carried to ward off plague and “putrid air.” Herbalists used it extensively for respiratory complaints, digestive issues, and as a general tonic.

Oregano gained particular culinary prominence in Italian and Greek cuisines, becoming inseparable from Mediterranean food culture. It was brought to the Americas by European colonists and became naturalised in many regions.

The essential oil became commercially important in the 20th century for food preservation due to its powerful antimicrobial properties. Modern research has validated traditional uses and revealed oregano’s potential in addressing antibiotic resistance, one of the most pressing medical challenges of our time.

Additional Information

Chemotype Variation: The medicinal potency of oregano varies dramatically between subspecies and chemotypes. Origanum vulgare subsp. hirtum (Greek oregano) typically contains 60-80% carvacrol and is most medicinally potent. Other chemotypes may be dominated by sabinene, terpineol, or other compounds with different therapeutic profiles. Always source high-quality oregano from reputable suppliers and verify carvacrol content for medicinal use.

Oregano vs. Marjoram: True oregano (Origanum vulgare) is distinct from sweet marjoram (Origanum majorana or Majorana hortensis). While related, marjoram has a sweeter, milder flavor and different essential oil composition with lower carvacrol content. They should not be used interchangeably for medicinal purposes.

Essential Oil Quality: Oregano essential oil is frequently adulterated or substituted with cheaper oils. Purchase only from reputable sources with GC-MS analysis certificates showing carvacrol content. Therapeutic-grade oregano oil should contain 60-85% carvacrol.

Synergistic Combinations: Oregano combines well with other antimicrobial herbs including thyme (Thymus vulgaris), garlic (Allium sativum), goldenseal (Hydrastis canadensis), and echinacea (Echinacea spp.) for enhanced antimicrobial effects.

Probiotic Support Essential: Due to oregano’s broad-spectrum antimicrobial effects, follow therapeutic use (especially of essential oil) with high-quality probiotic supplementation to restore beneficial gut flora. Take probiotics at least 2 hours separated from oregano preparations.

Aotearoa New Zealand Context: Oregano grows exceptionally well in New Zealand’s temperate climate and is widely cultivated in home gardens and commercially. Fresh oregano is available year-round at farmers’ markets and supermarkets. Dried oregano (culinary grade) is widely available at supermarkets. Growing oregano at home is economical and ensures fresh, high-quality herb. Common varieties available from NZ garden centers include Greek oregano (most medicinally potent), Italian oregano, and ornamental varieties.

Sources

Adam, K., Sivropoulou, A., Kokkini, S., Lanaras, T., & Arsenakis, M. (1998). Antifungal activities of Origanum vulgare subsp. hirtum, Mentha spicata, Lavandula angustifolia, and Salvia fruticosa essential oils against human pathogenic fungi. Journal of Agricultural and Food Chemistry, 46(5), 1739-1745.

Burt, S. (2004). Essential oils: Their antibacterial properties and potential applications in foods–A review. International Journal of Food Microbiology, 94(3), 223-253.

Leyva-López, N., Gutiérrez-Grijalva, E. P., Vazquez-Olivo, G., & Heredia, J. B. (2017). Essential oils of oregano: Biological activity beyond their antimicrobial properties. Molecules, 22(6), 989.

Lima, M. S., Quintans-Júnior, L. J., de Santana, W. A., Kaneto, C. M., Soares, M. B. P., & Villarreal, C. F. (2013). Anti-inflammatory effects of carvacrol: Evidence for a key role of interleukin-10. European Journal of Pharmacology, 699(1-3), 112-117.

Lu, M., Dai, T., Murray, C. K., & Wu, M. X. (2018). Bactericidal property of oregano oil against multidrug-resistant clinical isolates. Frontiers in Microbiology, 9, 2329.

Manohar, V., Ingram, C., Gray, J., Talpur, N. A., Echard, B. W., Bagchi, D., & Preuss, H. G. (2001). Antifungal activities of origanum oil against Candida albicans. Molecular and Cellular Biochemistry, 228(1-2), 111-117.

Nostro, A., Blanco, A. R., Cannatelli, M. A., Enea, V., Flamini, G., Morelli, I., Sudano Roccaro, A., & Alonzo, V. (2004). Susceptibility of methicillin-resistant staphylococci to oregano essential oil, carvacrol and thymol. FEMS Microbiology Letters, 230(2), 191-195.

Nostro, A., Roccaro, A. S., Bisignano, G., Marino, A., Cannatelli, M. A., Pizzimenti, F. C., Cioni, P. L., Procopio, F., & Blanco, A. R. (2007). Effects of oregano, carvacrol and thymol on Staphylococcus aureus and Staphylococcus epidermidis biofilms. Journal of Medical Microbiology, 56(4), 519-523.

Sakkas, H., & Papadopoulou, C. (2017). Antimicrobial activity of basil, oregano, and thyme essential oils. Journal of Microbiology and Biotechnology, 27(3), 429-438.

Sienkiewicz, M., Łysakowska, M., Pastuszka, M., Bienias, W., & Kowalczyk, E. (2013). The potential of use basil and rosemary essential oils as effective antibacterial agents. Molecules, 18(8), 9334-9351.

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