Chronic Rhinosinusitis (Diagnosis)Phase 2NCT05427695
Topical Probiotic Sinus Irrigations for Treating Chronic Sinusitis
A Phase 2 study testing Lactobacillus sakei proBio65 and Isotonic Saline Solution in people with Chronic Rhinosinusitis (Diagnosis), run by University of Illinois at Chicago at 1 site in United States.
Trial summary
The purpose of this randomized study will be to determine whether topical probiotic sinus irrigations are more effective compared to saline sinus irrigation controls in the treatment of active CRS in patients who have had prior sinus surgery based on subjective and objective outcome measures. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Chronic Rhinosinusitis (Diagnosis)
- What is being tested?
- Lactobacillus sakei proBio65 and Isotonic Saline Solution
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 60 participants
- Where
- 1 siteUnited States
- Study dates
- 5 Feb 2025to 30 Jul 2028
- Phase
- Phase 2
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Male and female patients 18 years of age or older.
- Patients diagnosed with acute exacerbation of CRS, defined by worsening of 1 or more sinonasal symptoms (nasal obstruction/congestion, nasal discharge, facial pain/pressure, reduced sense of smell) and inflammatory and/or infectious changes on sinus endoscopy.
- Patients that have undergone functional endoscopic sinus surgery > 12 months prior to enrollment as documented in the patients electronic medical record, with patent sinuses deemed suitable for trial on investigator's discretion.
- Patients must be willing to follow study related procedures for the duration of the study.
- Patients must understand the purpose and procedures and be willing to sign the study informed consent document.
- All adult men and women with active CRS will be considered for participation in this study without regard to race, gender, or socioeconomic status.
Who cannot join
- Patients who are taking topical antibiotic irrigations and are unwilling to stop them.
- Patients who are unable to complete self-administered questionnaires because of cognitive impairment, language barrier, or severe medical conditions.
- Patients who have a terminal illness (malignancy), immunocompromised (medication-related immunosuppression, immunodeficiency disorder) or systemic disease (granulomatosis polyangiitis or other autoimmune disease with sinonasal manifestations, cystic fibrosis), or recent head/sinonasal trauma that may predispose to infectious complications.
- Patients who have severe or emergent complications from CRS or presence of a sinus tumor.
- Female patients who are pregnant or breastfeeding. The patient will be asked if she is pregnant or has any chance of being pregnant. In either case, the patient will be excluded. Note in our consent form this is also addressed (excerpt below).
- Patients who are taking oral corticosteroids or who have taken oral antibiotics in the previous 2 weeks or on oral corticosteroids.
- Patients who have upper respiratory infection-type symptoms at time of enrollment, e.g., fevers/chills, sneezing, runny nose, sore throat, coughing. Patients can be eligible for enrollment once symptoms have fully resolved if all other inclusion/exclusion criteria are met.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site, 1 recruiting
- Recruiting
University of Illinois Hospitals & Health Sciences System
Chicago, Illinois, 60612
Victoria Lee, MD, 3129966582, vlee39@uic.edu
About this study
Official title: Topical Probiotic Sinus Irrigations for the Treatment of Chronic Rhinosinusitis: a Double Blinded Randomized Controlled Trial
The purpose of this randomized study will be to determine whether topical probiotic sinus irrigations are more effective compared to saline sinus irrigation controls in the treatment of active CRS in patients who have had prior sinus surgery based on subjective and objective outcome measures.
Read the detailed description
CRS is a common clinical entity with estimated prevalence ranging from 14-16% in the community. The most commonly implicated pathogenic bacteria in recalcitrant patients are Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa). In recent years, there has been an increasing focus on the commensal sinonasal microbiome and its role in the development of a functional immune system. It has been theorized that infections in CRS may be related to a decrease in diversity of the commensal microbiome and an increase in these pathogenic bacteria. The concept behind the therapeutic potential of topical probiotics is that they outcompete pathogenic bacteria via a variety of mechanisms, including creating suboptimal environmental conditions, competing for cell surface receptors and thus limiting pathogen adherence, and producing antibacterial metabolites. In doing so, topical probiotics restore the commensal microbiome.
For this study, after being informed about the study and potential risks, all patients meeting eligibility criteria and giving written informed consent will be randomized in a double blind manner (participant and investigator) in a 1:1 ratio to Lactobacillus sakei or saline nasal irrigation, twice a day for 14 days.
Patient assessments will occur before treatments begin, immediately after the completion of nasal irrigations, and 6 weeks after initial enrollment. Assessments will be based on patient history, endoscopic exams, culture swab of the sinuses (bacterial burden and number of taxa, SNOT-22 survey, and a visual analog scale to record pain scores.
- Conditions
- Chronic Rhinosinusitis (Diagnosis)
- Being tested
- Lactobacillus sakei proBio65, Isotonic Saline Solution
- Medical subject headings
- Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Lactobacillus sakei proBio65Drug
Also called Lanto Sinus Probiotic Powder
Lanto Sinus probiotic Lactobacillus sakei is a currently available over the counter supplement from the common source kimchi and produced in South Korea. Patients will be instructed to mix 1 packet with lukewarm distilled or boiled water in 240mL NeilMed® sinus rinse bottle.
Isotonic Saline SolutionOther
Also called NeilMed Isotonic Sinus Rinse
Saline sinus irrigations (SAL group): NeilMed® Isotonic Sinus Rinse™ is marketed as a saline sinus irrigation formula. Subjects will be given instructions to mix one unlabeled packet (containing NeilMed® premixed buffered salt powder) with lukewarm distilled or boiled water in 240mL NeilMed® sinus rinse bottle.
| Study group | Role | What they receive |
|---|---|---|
| Saline Nasal Irrigation (Control) | Active comparator | Patients will perform nasal irrigation with an isotonic saline solution, using a 240ml NeilMed sinus rinse bottle, 2 times/day for 14 days. A blinded packet supplied by IDS containing a premeasured amount of saline to be mixed with 240ml of distilled water will be provided to patients for each irrigation. Receives: Other: Isotonic Saline Solution |
| Lactobacillus sakei nasal irrigation | Experimental | Patients will perform nasal irrigation with Lactobacillus sakei, using a 240ml NeilMed sinus rinse bottle, 2 times/day for 14 days. A blinded packet provided by IDS containing a premeasured amount of Lactobacillus sakei to be mixed with 240ml of distilled water will be provided to patients for each irrigation. Receives: Drug: Lactobacillus sakei proBio65 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Sinonasal Outcome Test-22 (SNOT-22)
It is expected that topical probiotic irrigations will result in a clinically significant change in symptom severity score (SNOT-22) (a change of 9 on a scale 0-110) compared to saline irrigations (primary outcome).
Measured: 6 weeks
Secondary outcomes (1)
Sinus microbiota
Nasal swab samples will be assessed for the number of bacteria present before and after treatment. Bacterial DNA will be extracted from nasal swabs. The purified DNA will be quantified for concentration using a Qubit fluorometer (Invitrogen, CA, USA) before storing at -20°C until further use. Bacterial burden will be determined by quantitative PCR (qPCR) using universal 16S ribosomal RNA primers. Additionally, each nasal swab will be assessed for bacteria taxonomic distribution by NGS using the MiSeq NGS platform (Illumina) before and after treatment. MiSeq paired-end sequencing of the hypervariable V3-V4 regions of the 16S rRNA gene (primers 341F/785R) will be performed.
Measured: 6 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Jun 2022
- Study start5 Feb 2025
- Primary completion31 Mar 2028 (estimated)
- Study completion30 Jul 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (15)Papers the sponsor has linked to this study.
- Other trials for Chronic Rhinosinusitis (Diagnosis)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- Adult patients of the PI's or co-investigator's with a diagnosis of active CRS and who meet the inclusion and exclusion criteria will be eligible to participate. A total of 60 subjects will be randomize evenly into 2 study groups: 30 patients in the saline group (SAL) and 30 patient in the Lactobacillus sakei group (LAC). Patients will asked to do nasal irrigations 2 times/day for 14 days. Patient history, sinus exams, culture swabs, surveys (SNOT-22) and pain scale will access pre and post treatment results. Patients will be assessed and compared prior to beginning sinus irrigations, the week after irrigations are completed, and 6 weeks after initial assessment.
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 60 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Illinois at Chicago
- Sponsor type
- University, hospital or other
- Collaborators
- Cures Within Reach
- Responsible party
- Principal investigator, Victoria S. Lee, University of Illinois at Chicago
- Investigators
- Victoria Lee, MD, Principal investigator, University of Illinois at Chicago
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05427695
- Sponsor's protocol ID
- 2021-1205
- Status last verified
- May 2026
- First submitted
- 10 Jun 2022
- Last updated
- 27 May 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Lee VS, Humphreys IM, Purcell PL, Davis GE. Manuka honey sinus irrigation for the treatment of chronic rhinosinusitis: a randomized controlled trial. Int Forum Allergy Rhinol. 2017 Apr;7(4):365-372. doi: 10.1002/alr.21898. Epub 2016 Dec 9.
PubMed 27935259Ooi ML, Jothin A, Bennett C, Ooi EH, Vreugde S, Psaltis AJ, Wormald PJ. Manuka honey sinus irrigations in recalcitrant chronic rhinosinusitis: phase 1 randomized, single-blinded, placebo-controlled trial. Int Forum Allergy Rhinol. 2019 Dec;9(12):1470-1477. doi: 10.1002/alr.22423. Epub 2019 Aug 28.
PubMed 31461581Orlandi RR, Kingdom TT, Hwang PH, Smith TL, Alt JA, Baroody FM, Batra PS, Bernal-Sprekelsen M, Bhattacharyya N, Chandra RK, Chiu A, Citardi MJ, Cohen NA, DelGaudio J, Desrosiers M, Dhong HJ, Douglas R, Ferguson B, Fokkens WJ, Georgalas C, Goldberg A, Gosepath J, Hamilos DL, Han JK, Harvey R, Hellings P, Hopkins C, Jankowski R, Javer AR, Kern R, Kountakis S, Kowalski ML, Lane A, Lanza DC, Lebowitz R, Lee HM, Lin SY, Lund V, Luong A, Mann W, Marple BF, McMains KC, Metson R, Naclerio R, Nayak JV, Otori N, Palmer JN, Parikh SR, Passali D, Peters A, Piccirillo J, Poetker DM, Psaltis AJ, Ramadan HH, Ramakrishnan VR, Riechelmann H, Roh HJ, Rudmik L, Sacks R, Schlosser RJ, Senior BA, Sindwani R, Stankiewicz JA, Stewart M, Tan BK, Toskala E, Voegels R, Wang de Y, Weitzel EK, Wise S, Woodworth BA, Wormald PJ, Wright ED, Zhou B, Kennedy DW. International Consensus Statement on Allergy and Rhinology: Rhinosinusitis. Int Forum Allergy Rhinol. 2016 Feb;6 Suppl 1:S22-209. doi: 10.1002/alr.21695.
PubMed 26889651Cervin AU. The Potential for Topical Probiotic Treatment of Chronic Rhinosinusitis, a Personal Perspective. Front Cell Infect Microbiol. 2018 Jan 12;7:530. doi: 10.3389/fcimb.2017.00530. eCollection 2017.
PubMed 29379772Foreman A, Psaltis AJ, Tan LW, Wormald PJ. Characterization of bacterial and fungal biofilms in chronic rhinosinusitis. Am J Rhinol Allergy. 2009 Nov-Dec;23(6):556-61. doi: 10.2500/ajra.2009.23.3413.
PubMed 19958600Gasta MG, Gossard CM, Williamson CB, Dolan KE, Finley HJ, Burns CM, Parker EC, Pizano JM, Lipski EA. Probiotics and Disease: A Comprehensive Summary-Part 5, Respiratory Conditions of the Ears, Nose, and Throat. Integr Med (Encinitas). 2017 Jun;16(3):28-40.
PubMed 30881245Abreu NA, Nagalingam NA, Song Y, Roediger FC, Pletcher SD, Goldberg AN, Lynch SV. Sinus microbiome diversity depletion and Corynebacterium tuberculostearicum enrichment mediates rhinosinusitis. Sci Transl Med. 2012 Sep 12;4(151):151ra124. doi: 10.1126/scitranslmed.3003783.
PubMed 22972842Humphreys GJ, McBain AJ. Antagonistic effects of Streptococcus and Lactobacillus probiotics in pharyngeal biofilms. Lett Appl Microbiol. 2019 Apr;68(4):303-312. doi: 10.1111/lam.13133. Epub 2019 Mar 13.
PubMed 30776138Forestier C, Guelon D, Cluytens V, Gillart T, Sirot J, De Champs C. Oral probiotic and prevention of Pseudomonas aeruginosa infections: a randomized, double-blind, placebo-controlled pilot study in intensive care unit patients. Crit Care. 2008;12(3):R69. doi: 10.1186/cc6907. Epub 2008 May 20.
PubMed 18489775Roos K, Hakansson EG, Holm S. Effect of recolonisation with "interfering" alpha streptococci on recurrences of acute and secretory otitis media in children: randomised placebo controlled trial. BMJ. 2001 Jan 27;322(7280):210-2. doi: 10.1136/bmj.322.7280.210.
PubMed 11159619Roos K, Simark-Mattsson C, Grahn Hakansson E, Larsson L, Sandberg T, Ahren C. Can probiotic lactobacilli eradicate persistent carriage of meticillin-resistant Staphylococcus aureus? J Hosp Infect. 2011 May;78(1):77-8. doi: 10.1016/j.jhin.2011.01.010. Epub 2011 Mar 2. No abstract available.
PubMed 21371778Bomer K, Brichta A, Baroody F, Boonlayangoor S, Li X, Naclerio RM. A mouse model of acute bacterial rhinosinusitis. Arch Otolaryngol Head Neck Surg. 1998 Nov;124(11):1227-32. doi: 10.1001/archotol.124.11.1227.
PubMed 9821924Prince AA, Steiger JD, Khalid AN, Dogrhamji L, Reger C, Eau Claire S, Chiu AG, Kennedy DW, Palmer JN, Cohen NA. Prevalence of biofilm-forming bacteria in chronic rhinosinusitis. Am J Rhinol. 2008 May-Jun;22(3):239-45. doi: 10.2500/ajr.2008.22.3180.
PubMed 18588755Rosenfeld RM. Clinical practice guideline on adult sinusitis. Otolaryngol Head Neck Surg. 2007 Sep;137(3):365-77. doi: 10.1016/j.otohns.2007.07.021.
PubMed 17765760Hopkins C, Gillett S, Slack R, Lund VJ, Browne JP. Psychometric validity of the 22-item Sinonasal Outcome Test. Clin Otolaryngol. 2009 Oct;34(5):447-54. doi: 10.1111/j.1749-4486.2009.01995.x.
PubMed 19793277
Study at a glance
From the registry record, last updated by the sponsor on 27 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Topical Probiotic Sinus Irrigations for the Treatment of Chronic Rhinosinusitis: a Double Blinded Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT05427695
- Acronym / sponsor ID
- 2021-1205
- Conditions
- Chronic Rhinosinusitis (Diagnosis)
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 60 participants (estimated)
- Lead sponsor
- University of Illinois at ChicagoUniversity, hospital or other
- Collaborators
- Cures Within Reach
- Study start
- 5 Feb 2025 (actual)
- Primary completion
- 31 Mar 2028 (estimated)
- Study completion
- 30 Jul 2028 (estimated)
- First posted
- 22 Jun 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this randomized study will be to determine whether topical probiotic sinus irrigations are more effective compared to saline sinus irrigation controls in the treatment of active CRS in patients who have had prior sinus surgery based on subjective and objective outcome measures.
Detailed description
CRS is a common clinical entity with estimated prevalence ranging from 14-16% in the community. The most commonly implicated pathogenic bacteria in recalcitrant patients are Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa). In recent years, there has been an increasing focus on the commensal sinonasal microbiome and its role in the development of a functional immune system. It has been theorized that infections in CRS may be related to a decrease in diversity of the commensal microbiome and an increase in these pathogenic bacteria. The concept behind the therapeutic potential of topical probiotics is that they outcompete pathogenic bacteria via a variety of mechanisms, including creating suboptimal environmental conditions, competing for cell surface receptors and thus limiting pathogen adherence, and producing antibacterial metabolites. In doing so, topical probiotics restore the commensal microbiome.
For this study, after being informed about the study and potential risks, all patients meeting eligibility criteria and giving written informed consent will be randomized in a double blind manner (participant and investigator) in a 1:1 ratio to Lactobacillus sakei or saline nasal irrigation, twice a day for 14 days.
Patient assessments will occur before treatments begin, immediately after the completion of nasal irrigations, and 6 weeks after initial enrollment. Assessments will be based on patient history, endoscopic exams, culture swab of the sinuses (bacterial burden and number of taxa, SNOT-22 survey, and a visual analog scale to record pain scores.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
- Model description
- Adult patients of the PI's or co-investigator's with a diagnosis of active CRS and who meet the inclusion and exclusion criteria will be eligible to participate. A total of 60 subjects will be randomize evenly into 2 study groups: 30 patients in the saline group (SAL) and 30 patient in the Lactobacillus sakei group (LAC). Patients will asked to do nasal irrigations 2 times/day for 14 days. Patient history, sinus exams, culture swabs, surveys (SNOT-22) and pain scale will access pre and post treatment results. Patients will be assessed and compared prior to beginning sinus irrigations, the week after irrigations are completed, and 6 weeks after initial assessment.
| Arm | Type | Receives |
|---|---|---|
| Saline Nasal Irrigation (Control) | Active comparator | Other: Isotonic Saline SolutionPatients will perform nasal irrigation with an isotonic saline solution, using a 240ml NeilMed sinus rinse bottle, 2 times/day for 14 days. A blinded packet supplied by IDS containing a premeasured amount of saline to be mixed with 240ml of distilled water will be provided to patients for each irrigation. |
| Lactobacillus sakei nasal irrigation | Experimental | Drug: Lactobacillus sakei proBio65Patients will perform nasal irrigation with Lactobacillus sakei, using a 240ml NeilMed sinus rinse bottle, 2 times/day for 14 days. A blinded packet provided by IDS containing a premeasured amount of Lactobacillus sakei to be mixed with 240ml of distilled water will be provided to patients for each irrigation. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Male and female patients 18 years of age or older.
- Patients diagnosed with acute exacerbation of CRS, defined by worsening of 1 or more sinonasal symptoms (nasal obstruction/congestion, nasal discharge, facial pain/pressure, reduced sense of smell) and inflammatory and/or infectious changes on sinus endoscopy.
- Patients that have undergone functional endoscopic sinus surgery > 12 months prior to enrollment as documented in the patients electronic medical record, with patent sinuses deemed suitable for trial on investigator's discretion.
- Patients must be willing to follow study related procedures for the duration of the study.
- Patients must understand the purpose and procedures and be willing to sign the study informed consent document.
Key exclusion criteria (7 listed)
- Patients who are taking topical antibiotic irrigations and are unwilling to stop them.
- Patients who are unable to complete self-administered questionnaires because of cognitive impairment, language barrier, or severe medical conditions.
- Patients who have a terminal illness (malignancy), immunocompromised (medication-related immunosuppression, immunodeficiency disorder) or systemic disease (granulomatosis polyangiitis or other autoimmune disease with sinonasal manifestations, cystic fibrosis), or recent head/sinonasal trauma that may predispose to infectious complications.
- Patients who have severe or emergent complications from CRS or presence of a sinus tumor.
- Female patients who are pregnant or breastfeeding. The patient will be asked if she is pregnant or has any chance of being pregnant. In either case, the patient will be excluded. Note in our consent form this is also addressed (excerpt below).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Lactobacillus sakei proBio65Also: Lanto Sinus Probiotic PowderLanto Sinus probiotic Lactobacillus sakei is a currently available over the counter supplement from the common source kimchi and produced in South Korea. Patients will be instructed to mix 1 packet with lukewarm distilled or boiled water in 240mL NeilMed® sinus rinse bottle. | Drug | Lactobacillus sakei nasal irrigation |
| Isotonic Saline SolutionAlso: NeilMed Isotonic Sinus RinseSaline sinus irrigations (SAL group): NeilMed® Isotonic Sinus Rinse™ is marketed as a saline sinus irrigation formula. Subjects will be given instructions to mix one unlabeled packet (containing NeilMed® premixed buffered salt powder) with lukewarm distilled or boiled water in 240mL NeilMed® sinus rinse bottle. | Other | Saline Nasal Irrigation (Control) |
Primary outcome
Sinonasal Outcome Test-22 (SNOT-22)
Time frame: 6 weeks
It is expected that topical probiotic irrigations will result in a clinically significant change in symptom severity score (SNOT-22) (a change of 9 on a scale 0-110) compared to saline irrigations (primary outcome).
1 secondary outcome
Sinus microbiota
Time frame: 6 weeks
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 May 2026.
- Background: PubMed 27935259Lee VS, Humphreys IM, Purcell PL, Davis GE. Manuka honey sinus irrigation for the treatment of chronic rhinosinusitis: a randomized controlled trial. Int Forum Allergy Rhinol. 2017 Apr;7(4):365-372. doi: 10.1002/alr.21898. Epub 2016 Dec 9.
- Background: PubMed 31461581Ooi ML, Jothin A, Bennett C, Ooi EH, Vreugde S, Psaltis AJ, Wormald PJ. Manuka honey sinus irrigations in recalcitrant chronic rhinosinusitis: phase 1 randomized, single-blinded, placebo-controlled trial. Int Forum Allergy Rhinol. 2019 Dec;9(12):1470-1477. doi: 10.1002/alr.22423. Epub 2019 Aug 28.
- Background: PubMed 26889651Orlandi RR, Kingdom TT, Hwang PH, Smith TL, Alt JA, Baroody FM, Batra PS, Bernal-Sprekelsen M, Bhattacharyya N, Chandra RK, Chiu A, Citardi MJ, Cohen NA, DelGaudio J, Desrosiers M, Dhong HJ, Douglas R, Ferguson B, Fokkens WJ, Georgalas C, Goldberg A, Gosepath J, Hamilos DL, Han JK, Harvey R, Hellings P, Hopkins C, Jankowski R, Javer AR, Kern R, Kountakis S, Kowalski ML, Lane A, Lanza DC, Lebowitz R, Lee HM, Lin SY, Lund V, Luong A, Mann W, Marple BF, McMains KC, Metson R, Naclerio R, Nayak JV, Otori N, Palmer JN, Parikh SR, Passali D, Peters A, Piccirillo J, Poetker DM, Psaltis AJ, Ramadan HH, Ramakrishnan VR, Riechelmann H, Roh HJ, Rudmik L, Sacks R, Schlosser RJ, Senior BA, Sindwani R, Stankiewicz JA, Stewart M, Tan BK, Toskala E, Voegels R, Wang de Y, Weitzel EK, Wise S, Woodworth BA, Wormald PJ, Wright ED, Zhou B, Kennedy DW. International Consensus Statement on Allergy and Rhinology: Rhinosinusitis. Int Forum Allergy Rhinol. 2016 Feb;6 Suppl 1:S22-209. doi: 10.1002/alr.21695.
- Background: PubMed 29379772Cervin AU. The Potential for Topical Probiotic Treatment of Chronic Rhinosinusitis, a Personal Perspective. Front Cell Infect Microbiol. 2018 Jan 12;7:530. doi: 10.3389/fcimb.2017.00530. eCollection 2017.
- Background: PubMed 19958600Foreman A, Psaltis AJ, Tan LW, Wormald PJ. Characterization of bacterial and fungal biofilms in chronic rhinosinusitis. Am J Rhinol Allergy. 2009 Nov-Dec;23(6):556-61. doi: 10.2500/ajra.2009.23.3413.
- Background: PubMed 30881245Gasta MG, Gossard CM, Williamson CB, Dolan KE, Finley HJ, Burns CM, Parker EC, Pizano JM, Lipski EA. Probiotics and Disease: A Comprehensive Summary-Part 5, Respiratory Conditions of the Ears, Nose, and Throat. Integr Med (Encinitas). 2017 Jun;16(3):28-40.
- Background: PubMed 22972842Abreu NA, Nagalingam NA, Song Y, Roediger FC, Pletcher SD, Goldberg AN, Lynch SV. Sinus microbiome diversity depletion and Corynebacterium tuberculostearicum enrichment mediates rhinosinusitis. Sci Transl Med. 2012 Sep 12;4(151):151ra124. doi: 10.1126/scitranslmed.3003783.
- Background: PubMed 30776138Humphreys GJ, McBain AJ. Antagonistic effects of Streptococcus and Lactobacillus probiotics in pharyngeal biofilms. Lett Appl Microbiol. 2019 Apr;68(4):303-312. doi: 10.1111/lam.13133. Epub 2019 Mar 13.
- Background: PubMed 18489775Forestier C, Guelon D, Cluytens V, Gillart T, Sirot J, De Champs C. Oral probiotic and prevention of Pseudomonas aeruginosa infections: a randomized, double-blind, placebo-controlled pilot study in intensive care unit patients. Crit Care. 2008;12(3):R69. doi: 10.1186/cc6907. Epub 2008 May 20.
- Background: PubMed 11159619Roos K, Hakansson EG, Holm S. Effect of recolonisation with "interfering" alpha streptococci on recurrences of acute and secretory otitis media in children: randomised placebo controlled trial. BMJ. 2001 Jan 27;322(7280):210-2. doi: 10.1136/bmj.322.7280.210.
- Background: PubMed 21371778Roos K, Simark-Mattsson C, Grahn Hakansson E, Larsson L, Sandberg T, Ahren C. Can probiotic lactobacilli eradicate persistent carriage of meticillin-resistant Staphylococcus aureus? J Hosp Infect. 2011 May;78(1):77-8. doi: 10.1016/j.jhin.2011.01.010. Epub 2011 Mar 2. No abstract available.
- Background: PubMed 9821924Bomer K, Brichta A, Baroody F, Boonlayangoor S, Li X, Naclerio RM. A mouse model of acute bacterial rhinosinusitis. Arch Otolaryngol Head Neck Surg. 1998 Nov;124(11):1227-32. doi: 10.1001/archotol.124.11.1227.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Victoria Lee, MD principal investigator
University of Illinois at Chicago
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Lactobacillus sakei proBio65 and Isotonic Saline Solution in people with Chronic Rhinosinusitis (Diagnosis), run by University of Illinois at Chicago at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 27 May 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Victoria Lee, MD (312.996.6582, vlee39@uic.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Sinonasal Outcome Test-22 (SNOT-22) (time frame: 6 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05427695, which also lists 15 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 May 2026.