Beneficial effects of bacteriophage treatments
The invention relates to use of one or more bacteriophages in vivo in a human or animal in order to induce sensitivity to chemical antibiotics in bacterial cells, where such susceptibility is heritable, independent of continuing bacteriophage metabolism within those cells, and does not relate to the destruction of a biofilm to induce such sensitivity.
1. A method to induce sensitivity to chemical antibiotics in bacterial cells,
comprising administering one or more bacteriophages in vivo in a human or animal; and
monitoring induction of the sensitivity by antibiotic sensitivity testing in vitro, both before and after the administering of the one or more bacteriophages;
where the sensitivity is heritable, independent of continuing bacteriophage metabolism within those cells, and does not relate to the destruction of a biofilm to induce sensitivity, and
the bacterial cells are Pseudomonas aeruginosa.
2. The method of claim 1 where testing is used to select chemical antibiotics for therapeutic use in a patient.
3. The method of claim 1 where there is induction of sensitivity to an aminoglycoside antibiotic.
4. The method according to claim 1 wherein the one or more bacteriophages comprises a combined preparation of six bacteriophages NCIMB (National collection of Industrial and Marine Bacteria) 41174, NCIMB 41175, NCIMB 41176, NCIMB 41177, NCIMB 41178 and NCIMB 41179.
5. The method according to claim 1 further comprising administering at least one antibiotic.
6. A method to induce or improve susceptibility to an antibiotic in bacterial cells comprising:
administering to a human or animal with a bacterial infection, a bacteriophage preparation comprising one or more bacteriophages, and
determining the ability of said preparation to increase susceptibility of said cells to said antibiotic by in vitro antibiotic testing in the absence of bacteriophages using samples of bacterial cells from said infection or from another infection by the same or a comparable bacterial strain of the same species subject to identical exposure to said bacteriophage preparation,
wherein said in vitro antibiotic testing is carried out both before and after the exposure to said bacteriophage preparation, and
said infection is a Pseudomonas aeruginosa infection.
7. The method according to claim 6 wherein said one or more bacteriophages induce or improve susceptibility to an aminoglycoside antibiotic.
8. The method according to claim 6 where the testing is used to select chemical antibiotics for therapeutic use in a patient.
9. The method according to claim 6 further comprising administering at least one antibiotic.
10. The method according to claim 6 where the one or more bacteriophages comprises a combined preparation of six bacteriophages NCIMB (National collection of Industrial and Marine Bacteria) 41174, NCIMB 41175, NCIMB 41176, NCIMB 41177, NCIMB 41178 and NCIMB 41179.
11. A method to treat a bacterial infection in a human or animal, comprising:
testing bacteria from the bacterial infection for susceptibility to an antibiotic, before the bacteria are exposed to a bacteriophage preparation,
administering the bacteriophage preparation to the human or animal, to expose the bacteria in the bacterial infection, to the bacteriophage preparation,
testing the bacteria from the bacterial infection for susceptibility to the antibiotic, after the bacteria are exposed to the bacteriophage preparation, and
administering the antibiotic to the human or animal, after administering the bacteriophage preparation,
wherein the bacteriophage preparation comprises one or more bacteriophages,
susceptibility of the bacteria to the antibiotic after the bacteria are exposed to the bacteriophage preparation, is greater than susceptibility of the bacteria to the antibiotic before the bacteria are exposed to the bacteriophage preparation, and
the bacteria are Pseudomonas aeruginosa.
12. The method according to claim 11 wherein a time period between administering the bacteriophage preparation and administering the antibiotic is one to two days.
13. The method according to claim 11 wherein said infection is a Pseudomonas aeruginosa infection.
14. The method according to claim 13 where the one or more bacteriophages comprises a combined bacteriophage preparation of six bacteriophages NCIMB 41174, NCIMB 41175, NCIMB 41176, NCIMB 41177, NCIMB 41178 and NCIMB 41179.
15. The method according to claim 11 wherein a time period between administering the bacteriophage preparation and administering the antibiotic is one day to two months.
16. The method according to claim 11 , wherein the antibiotic is an aminoglycoside antibiotic.