How to Treat Resistant Staphylococcus aureus: Phage Therapy
To treat antibiotic-resistant Staphylococcus aureus, phage therapy uses bacteriophages — natural viruses that specifically target and destroy Staphylococcus aureus. Practised without interruption since 1923 at the Eliava Institute in Tbilisi, Georgia, this method treats infections that antibiotics can no longer control: MRSA, osteitis, prosthetic joint infections, chronic wounds.
Why Your Staphylococcus aureus Resists Antibiotics
If your Staphylococcus aureus infection persists despite multiple courses of antibiotics, it is neither your fault nor your doctor’s. Staphylococcus aureus is one of the most difficult bacteria to eradicate, for two specific reasons.
The biofilm. The bacterium forms a protective shell, often invisible on imaging, that adheres to your tissues, bone, or a prosthesis. Inside, the antibiotic can no longer penetrate: the bacterium is not killed, merely dormant, ready to reawaken as soon as treatment stops. This is the central mechanism behind chronic and recurrent infections — it explains why an infection keeps coming back despite antibiotics.
Acquired resistance. With each cycle, the weaker bacteria die while the most resistant survive and multiply. MRSA (Methicillin-Resistant Staphylococcus aureus) has become one of the greatest challenges in hospital medicine worldwide. According to estimates published in The Lancet, antimicrobial resistance is directly linked to approximately 1.27 million deaths per year worldwide, and resistant Staphylococcus aureus ranks among the most concerning pathogens.
When your doctor mentions amputation, palliative care, or a “lifelong” infection, they are not wrong: they are saying that with the tools available today, there is no longer a solution. But there is another tool, one that works in a radically different way — see what sets phages apart from antibiotics.
The biofilm. The bacterium forms a protective shell, often invisible on imaging, that adheres to your tissues, bone, or a prosthesis. Inside, the antibiotic can no longer penetrate: the bacterium is not killed, merely dormant, ready to reawaken as soon as treatment stops. This is the central mechanism behind chronic and recurrent infections — it explains why an infection keeps coming back despite antibiotics.
Acquired resistance. With each cycle, the weaker bacteria die while the most resistant survive and multiply. MRSA (Methicillin-Resistant Staphylococcus aureus) has become one of the greatest challenges in hospital medicine worldwide. According to estimates published in The Lancet, antimicrobial resistance is directly linked to approximately 1.27 million deaths per year worldwide, and resistant Staphylococcus aureus ranks among the most concerning pathogens.
When your doctor mentions amputation, palliative care, or a “lifelong” infection, they are not wrong: they are saying that with the tools available today, there is no longer a solution. But there is another tool, one that works in a radically different way — see what sets phages apart from antibiotics.
The Anti-Staphylococcal Phages of the Eliava Institute
Bacteriophages target a specific bacterial species without ever affecting human cells or the microbiome — understand the mechanism of phage therapy.
When it comes to Staphylococcus aureus, the Eliava Institute is unmatched. S. aureus has been studied by its teams since the 1930s, and the centre holds what is probably the world’s largest collection of anti-S. aureus phages, continuously updated to keep pace with the evolution of resistant strains. It has produced without interruption several preparations active against Staphylococcus:
Most Western countries currently only grant Compassionate Use Authorisations on a case-by-case basis and do not produce any phages for routine clinical use: for a resistant Staphylococcus, the Eliava Institute remains the reference centre for international patients — discover the Eliava Institute.
When it comes to Staphylococcus aureus, the Eliava Institute is unmatched. S. aureus has been studied by its teams since the 1930s, and the centre holds what is probably the world’s largest collection of anti-S. aureus phages, continuously updated to keep pace with the evolution of resistant strains. It has produced without interruption several preparations active against Staphylococcus:
- Sb-1 — monovalent staphylococcal phage
- Pyo phage — polyvalent cocktail also targeting Staphylococcus
- Staphylococcal phage — cocktail specifically targeting Staphylococcus
Most Western countries currently only grant Compassionate Use Authorisations on a case-by-case basis and do not produce any phages for routine clinical use: for a resistant Staphylococcus, the Eliava Institute remains the reference centre for international patients — discover the Eliava Institute.
How Your Staphylococcus Treatment Works in Tbilisi
The protocol is based on a simple principle: a phage is never applied at random, but the one that precisely kills your strain, identified through a sensitivity test — understand the phagogram. For Staphylococcus aureus, it is then the route of administration that makes all the difference, depending on the location of the infection:
- Intravenous route — staphylococcal septicaemia or diffuse deep osteitis.
- Topical application — chronic skin wound, open sinus tract, fistula, drained abscess.
- Instillation — directly into an infected prosthetic joint, or as intraoperative irrigation during surgical debridement.
- Inhalation — respiratory tract colonisation (cystic fibrosis, chronic bronchitis).
- Oral route — as a complement, when Staphylococcus is also present in the digestive tract.
Testimonials from Patients Treated for Staphylococcus aureus
Arm saved after 36 operations. After an open fracture and a resistant Staphylococcus aureus infection, this French patient underwent 36 procedures over five years; amputation was the next step being considered. Several courses of phage therapy at the Eliava Institute eradicated the infection and restored near-full use of his arm. Read the full testimonial →
Knee prosthesis and septic shock. Staphylococcus aureus infection on a total knee prosthesis, followed by septic shock in intensive care; removal of the prosthesis was scheduled. A course of targeted phage therapy stabilised the infection and the prosthesis was preserved. Read the full testimonial →
Chronic osteitis and recurrent septicaemia. Staphylococcus aureus osteitis for several years, with septicaemia each time antibiotics were discontinued. After several stays in Tbilisi, phage therapy put an end to the recurrences and made it possible to gradually stop the long-term antibiotic therapy. Read the full testimonial →
Treated remotely, without travelling. For this patient whose condition did not allow travel, only the sample was sent to Tbilisi; after the phagogram, personalised phages were shipped for on-site administration, under local medical supervision and remote guidance from Eliava. Read the full testimonial →
Knee prosthesis and septic shock. Staphylococcus aureus infection on a total knee prosthesis, followed by septic shock in intensive care; removal of the prosthesis was scheduled. A course of targeted phage therapy stabilised the infection and the prosthesis was preserved. Read the full testimonial →
Chronic osteitis and recurrent septicaemia. Staphylococcus aureus osteitis for several years, with septicaemia each time antibiotics were discontinued. After several stays in Tbilisi, phage therapy put an end to the recurrences and made it possible to gradually stop the long-term antibiotic therapy. Read the full testimonial →
Treated remotely, without travelling. For this patient whose condition did not allow travel, only the sample was sent to Tbilisi; after the phagogram, personalised phages were shipped for on-site administration, under local medical supervision and remote guidance from Eliava. Read the full testimonial →
Cost and Duration of Treatment
The cost and organisation of the stay are not specific to Staphylococcus: full details (consultations, phagogram, cocktail production, support, interpreter) can be found on the page how much does phage therapy treatment cost, and everything regarding travel (flight, accommodation, transfers, interpreter) on the page organising your stay in Georgia.
Key point for a Staphylococcus aureus infection: allow generally 14 to 21 days on site, with sometimes a second course a few months later for bone or prosthetic involvement.
Frequently Asked Questions — Staphylococcus aureus and Phage Therapy
In the majority of cases documented at the Eliava Institute, yes — provided your strain is sensitive to at least one phage in the collection, which is verified by the phagogram. No treatment guarantees 100% success, but for antibiotic-resistant Staphylococcus aureus infections, phage therapy achieves results that Western medicine can no longer match today.
Yes. A bacterium's resistance to antibiotics has no biological connection to its sensitivity to phages: the two mechanisms are entirely distinct. An MRSA strain that escapes all antibiotics can be perfectly sensitive to Eliava's phages. This is precisely the area where phage therapy is most useful.
Staphylococcus aureus prosthetic infections are among the most frequently treated indications at the Eliava Institute, with a century of clinical experience. When the phagogram identifies at least one phage active against your strain, preservation of the prosthesis — rather than surgical removal — is achieved in the majority of cases. In France, Prof. Tristan Ferry's team (Hôpital de la Croix-Rousse, Lyon) published the first results of the "PhagoDAIR" procedure on patients with no remaining therapeutic options in 2020, confirming on a smaller scale what has been practised daily in Tbilisi for decades.
Clinical improvement is often observed within the first 7 to 14 days: reduction in pain and discharge, progressive wound closure, decrease in inflammatory markers (CRP, white blood cells). For bone or prosthetic infections, progress is assessed over several months.
Wondering whether phage therapy is legal, whether it has side effects, or whether you need to stop antibiotics? These answers, common to all infections, are gathered on the page [what does phage therapy treat
Check Whether Your Staphylococcus aureus Can Be Treated with Phage Therapy
Fill in the medical questionnaire with your latest antibiogram, your latest bacteriological report and a summary of your medical history. Alain Lavit forwards your file to the doctors at the Eliava Institute, who will let you know within a few days whether phages suited to your strain are available.
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