Journal
LARYNGOSCOPE
Volume 123, Issue 11, Pages 2626-2632Publisher
WILEY-BLACKWELL
DOI: 10.1002/lary.24183
Keywords
Nasopore; anti-IHF; biofilms; nontypeable Haemophilus influenzae; antibiotics
Funding
- NIH/NIDCD [5R01-DC011818]
Ask authors/readers for more resources
Objectives/HypothesisIntranasal resorbable packing, such as Nasopore, is commonly used during sinus surgery despite a paucity of evidence that demonstrates clinical benefit. We theorized that Nasopore supports bacterial growth and biofilm formation. The DNABII family of bacterial nucleic acid binding proteins stabilizes the extracellular polymeric substance of the biofilm, thus protecting bacteria from host defenses and traditional antibiotics. We tested the hypothesis that use of anti-IHF antibodies in conjunction with antibiotics would enhance biofilm eradication from Nasopore. Study DesignIn vitro experiments. MethodsNontypeable Haemophilus influenzae (NTHI) biofilms were grown on Nasopore. Following 24-hour incubation, biofilms were incubated for an additional 16 hours with either medium alone, naive rabbit serum, rabbit anti-IHF serum, amoxicillin/clavulanate, or anti-IHF serum+amoxicillin/clavulanate. Computer statistics (COMSTAT) analysis was performed on images of biofilms obtained via confocal microscopy. ResultsNTHI readily formed a biofilm on Nasopore. Treatment with amoxicillin/clavulanate alone mediated an increase in biomass by 92% to 6.63 (2)/(3) compared to incubation in sterile medium alone (3.46 (2)/(3)). Treatment with anti-IHF alone reduced the biomass by 77% to 1.29 (2)/(3) compared to incubation with naive rabbit serum (5.53 (2)/(3)). Anti-IHF+amoxicillin/clavulanate reduced biomass by 88% to 0.66 (2)/(3) (P <0.02) compared to incubation with naive rabbit serum. ConclusionAntibiotics alone were ineffective in eradicating NTHI biofilms that had formed on Nasopore in vitro. Anti-IHF antibodies plus amoxicillin/clavulanate therapy synergistically reduced biofilm biomass by 88%. These data support clinical studies for the use of anti-IHF combined with antibiotics to reduce biofilm formation on intranasal packing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available