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Development of a Probiotic Strategy to Prevent or Eliminate Nasal Colonization With S. Aureus

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00977496
Recruitment Status : Withdrawn
First Posted : September 15, 2009
Last Update Posted : March 18, 2015
Information provided by:
Tufts Medical Center

Brief Summary:
The goal of this study is characterize the changes in bacterial diversity of the nares of hemodialysis patients. Another goal is to determine when hemodialysis patients become colonized with the bacteria Staphylococcus aureus, as nasal colonization with S. aureus is a major risk factor for invasive infection in hemodialysis patients. Fifteen subjects will be recruited into the study. Nasal swabs will be collected every month for six months or until one month after S. aureus colonization in order to determine any changes in the bacterial communities of the nose. Clinical data will also be collected to evaluate the possible influence of external factors on changes in the microbial communities in the patients' noses. This study will provide preliminary data on whether oral- and/or nasal-administered probiotics can eliminate nasal carriage of S. aureus.

Condition or disease Intervention/treatment
Hemodialysis Procedure: Nasal Swab

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Study Type : Observational
Actual Enrollment : 0 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Development of a Probiotic Strategy to Prevent or Eliminate Nasal Colonization With S Aureus
Study Start Date : May 2011

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Dialysis

Group/Cohort Intervention/treatment
Nasal Swab
New chronic hemodialysis patients with no evidence of nasal carriage of Staphylococcus aureus from Boston Dialysis Center Inc., the outpatient hemodialysis clinic of Tufts Medical Center
Procedure: Nasal Swab
Swabs will be moistened in sterile 0.9% sodium chloride solution and rotated in the anterior vestibule of both nares and processed for S aureus cultures and for bacterial DNA extraction.

Primary Outcome Measures :
  1. To describe the clinical variables that may be associated with the acquisition of S aureus nasal colonization, over a six-month period. [ Time Frame: Monthly for 6 months or monthly until 1 month after positive nasal swab for S aureus ]
  2. To refine and test the feasibility of using non culture-based methods to study the microbial ecology and bacterial diversity of the anterior nares in patients starting hemodialysis using 16sRNA sequence analysis. [ Time Frame: Monthly for 6 months or monthly until 1 month after positive nasal swab for S aureus ]
  3. To explore changes in bacterial diversity in the anterior nares over a six-month period and in conjunction with S aureus colonization. [ Time Frame: Monthly for 6 months or monthly until 1 month after positive nasal swab for S aureus ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients from the Boston Dialysis Center Inc outpatient hemodialysis clinic of Tufts Medical Center.

Inclusion Criteria:

  • Male and female subjects aged 18 years or older
  • On a stable hemodialysis schedule three times a week at Tufts Medical Center outpatient hemodialysis unit
  • Able to speak English, Spanish, Cantonese, or Mandarin (One of these languages is spoken by >95% of our hemodialysis population)
  • Provides informed consent to participate in the study
  • No plans to be absent from the dialysis unit in the next 6 months
  • Willingness to report on adverse events during the study period

Exclusion Criteria:

  • Patients in which hemodialysis was indicated for acute renal failure secondary to septic shock, acute tubular necrosis, or other condition which is felt to be temporary or secondary to a life threatening illness or likelihood of hemodialysis for less than 6 months.
  • Treatment with systemic anti-staphylococcal antibiotic therapy within 30 days prior to enrollment or planned use of topical mupirocin applied to the nares
  • Receiving peritoneal dialysis (concordance between the colonizing and infecting strain is not as high as in the hemodialysis population (105))
  • Absolute neutrophil count less than 500/mm3 or anticipated fall in neutrophil count < 500/mm3 (e.g. as a result of recent chemotherapy)
  • Bleeding diathesis such as platelets count less than 20 or INR >4 within the last 30 days
  • On immunosuppressive therapy
  • Anticipated renal transplant during the next 6 months
  • Evidence of active bowel leak, acute abdomen or colitis

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00977496

Sponsors and Collaborators
Tufts Medical Center
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Principal Investigator: Patricia L Hibberd, MD, PhD Tufts Medical Center

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Responsible Party: Patricia Hibberd, MD, PhD, Tufts Medical Center Identifier: NCT00977496    
Other Study ID Numbers: 8784
First Posted: September 15, 2009    Key Record Dates
Last Update Posted: March 18, 2015
Last Verified: March 2015
Keywords provided by Tufts Medical Center:
Staphylococcus aureus