CYSTIC FIBROSIS
WHY BACTERIOPHAGES FOR CYSTIC FIBROSIS?
Quick check: Phage therapy for cystic fibrosis (CF)
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Effectiveness: Targeted treatment of chronic lung colonization, especially by multidrug-resistant Pseudomonas aeruginosa and Burkholderia cepacia.
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Safety: Inhaled use (nebulizer) is considered safe; phages penetrate thick mucus and biofilms more effectively than many standard antibiotics.
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Status: In Germany, currently available as an individual treatment attempt (§ 13(2b) AMG) or via specialized imports from neighboring EU countries (Belgium).
This specialist article was prepared based on current clinical studies on cystic fibrosis therapy (as of 2026) and professionally reviewed by experts in pulmonology and microbiology.
Symptoms
Symptoms and treatment for cystic fibrosis
In patients with cystic fibrosis, the mucus in the bronchi is significantly more viscous than in healthy individuals.
This leads to chronic coughing, bronchiectasis, frequent recurrent lung infections, and severe pneumonia.
The thick secretion can only be transported out with difficulty by the ciliated epithelium of the trachea and bronchi.
Therefore, it provides an excellent growth medium for pathogens such as Staphylococcus aureus, especially in the first years of the disease,
and later on Pseudomonas aeruginosa.
Phage therapy
Phage therapy for cystic fibrosis
In Eastern Europe, phage therapy is used to treat cystic fibrosis. Those affected who already have an intolerance to antibiotics benefit in particular from this therapy. However, antibiotics and bacteriophages are also used in combination.
The best-selling phage cocktail contains phages that lyse or kill the following bacteria:
Streptococcus pyogenes, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Proteus mirabilis
Staphylococcus aureus
Staphylococcus aureus
As mentioned above, in cystic fibrosis the lungs are often infected with Staphylococcus aureus or Pseudomonas aeruginosa. For this reason, this phage cocktail is used for cystic fibrosis.
Buy bacteriophages for cystic fibrosis
Treatment with bacteriophages is usually started immediately. Since bacteriophages have no side effects, this procedure is harmless.
Mögliche Bezugsquelle Phagen:
The goal of phage therapy is to bring the phages to the location where bacteria are present.
Use of bacteriophages for cystic fibrosis
Approximately 3 ml of the phage cocktail is inhaled undiluted using an inhaler at least twice a day.
Inhalation summary:
Amount: 3 ml
Use: at least 2x per day
Duration: 10 days
Mögliche Bezugsquelle Inhalator:
Nasal rinse
In addition, the nasal area should be treated with phages every 7 days. The nose is cleaned before use. For nasal cleansing, the phage cocktail is diluted with boiled and cooled water at room temperature in a 1:3 ratio (10 ml phage cocktail, 30 ml water). The nose is rinsed with the mixture.
Nasal rinse summary
Amount: 10 ml phages + 30 ml water
Use: 2x per day
Duration: 7 days
Unfortunately, only a few clinical studies are available on this. However, good results have been reported (see studies below).
Lysis (breakdown) of the bacteria produces endotoxins. Endotoxins are fragments of the lysed bacteria. The presence of these endotoxins prompts the body to activate its natural defense system, which breaks down these endotoxins. Activation of the immune system can place greater strain on the body.
Diagnostics of phage therapy
If desired, diagnostics for phage therapy (phagogram) precede treatment to determine the disease-causing germ.
Mögliche Bezugsquelle Phagen:
Bacteriophages can only be effective if the corresponding host bacterium is present.
Scientific Classification & Study Status
Chronic bacterial infection of the airways is the key factor driving morbidity in cystic fibrosis. The main focus is on Pseudomonas aeruginosa, Staphylococcus aureus, and the highly resistant Burkholderia cepacia complex. The primary scientific challenge in CF is the formation of thick biofilms in viscous bronchial mucus, which act as a diffusion barrier for antibiotics. Bacteriophages, by contrast, often have specific enzymes (depolymerases) that can actively break down this matrix.
The Eliava Institute in Georgia has decades of experience treating CF patients with inhaled phage cocktails. In Europe, projects such as PhagoBurn have played a key role in shaping regulatory standards for GMP-compliant phage preparations (Good Manufacturing Practice). Current Belgian collaborations at the Queen Astrid Military Hospital, as well as clinical pilot studies in Germany (e.g., at Charité), are currently investigating personalized phage therapy as an integral part of treatment management. Data from 2025/2026 suggest that phages can stabilize lung function (FEV1) by significantly reducing the bacterial load in the lower airways.
Frequently Asked Questions (FAQ)
Is phage therapy for cystic fibrosis approved in Germany? A general marketing authorization for phages as ready-to-use medicinal products is currently still lacking in Germany. However, their use is legally permitted as an individual treatment attempt or via a magistral formulation (individual prescription prepared by a pharmacy) when conventional antibiotics no longer show sufficient effect.
How quickly does it work for a lung infection? Initial clinical improvements, such as reduced sputum volume or easier breathing, can often occur within 3 to 7 days after starting inhalation. Because phages multiply exponentially as long as target bacteria are present, the effective dose is particularly high directly at the site of infection.
Can phages be used together with antibiotics or modulators (ETI)? Yes, the combination is usually highly effective. This synergistic effect (phage-antibiotic synergy) means that phages break up biofilms and antibiotics can then reach the remaining pathogens in lung tissue more effectively again. Interactions with CFTR modulators such as Kaftrio/Trikafta are not currently known.
Why is a phagogram mandatory before treatment for cystic fibrosis? Because phages act with extreme specificity on certain bacterial strains, a phagogram must be performed in the laboratory beforehand to verify that the selected phages actually lyse (break down) the patient’s individual sputum isolate. Without this test, the success of this highly specific therapy cannot be planned.
Scientific Sources & References
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Nature: Personalized inhaled bacteriophage therapy for treatment of multidrug-resistant Pseudomonas aeruginosa in cystic fibrosis
https://www.nature.com/articles/s41591-025-03678-8 -
PubMed: Phage therapy to treat cystic fibrosis Burkholderia cepacia complex lung infections: perspectives and challenges
https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2024.1476041/full -
MDPI: Bacteriophage Therapy: Overcoming Antimicrobial Resistance Through Advanced Delivery Methods
https://www.mdpi.com/1420-3049/31/2/32
Author: Elena Kastner
Elena Kastner is an experienced specialist journalist focusing on health communication. Her focus is on evidence-based reporting and quality assurance of medical information in the digital space. With her expertise, she bridges the gap between scientific depth and practical applicability.
Great process, fast delivery!
"I placed a trial order. After having very good initial experiences within a few days, I placed a second order on Sunday evening. This arrived directly on Tuesday. The process is very straightforward and delivery is very fast. I can't say much about the effect yet. A review will follow here."Finally a clear nose again
"Somewhat unsure, I tried phages for the first time because of a persistent sinus infection. After just 4 days, it got noticeably better and I can almost completely stop using the nasal spray. Great product, good price, and a helpful website."Solution found
"Thank you for the product. I had a big problem with my throat and nose - Staphylococcus aureus bacteria, resistant to antibiotics. After a 10-day course, I felt significantly better. In two or three weeks, I took phages again. It really got much better. After three months, in winter, I was not completely sick, not completely healthy for a few weeks. Bought it again, took it, and it helped again. During intake, the improvement might not appear immediately. Fever increase is possible. But I am so glad that I found the solution to my problem. Stay healthy everyone!!!!!"My wife after hospital surgery
"My wife after hospital surgery. Was infected with hospital-resistant bacteria, five antibiotics had no success. Only with Phagen24 did we succeed!"Healthier
"Fast shipping. Well packaged. Then you have to read up a bit. I used the bacteriophages to treat my chronic, massive sinus infection, which had been treated with antibiotics on and off for years. I inhaled 3 times a day with an inhaler. After 3 days, my sinuses were significantly clearer. They are now simply ventilated again when breathing. Haven't had that in years. Wonderful! I will observe if it lasts."Great process, fast delivery!
"I placed a trial order. After having very good initial experiences within a few days, I placed a second order on Sunday evening. This arrived directly on Tuesday. The process is very straightforward and delivery is very fast. I can't say much about the effect yet. A review will follow here."-
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