- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01540227
Penicillin Therapeutic Drug Monitoring in the Treatment of Infectious Syphilis.
Penicillin Therapeutic Drug Monitoring in the Treatment of Infectious Syphilis. Do Low Serum Penicillin Levels Correlate With Treatment Failure?
Syphilis is a sexually transmitted infection that causes genital sores and rash, but in some circumstances may result in more severe and unexpected symptoms. These severe symptoms could include eye infections, meningitis (infection of the membranes covering the brain and spinal cord), and liver infection. If not properly treated, syphilis can also lead to heart problems and dementia (a decline in reasoning, memory and other mental abilities) years down the road. There has been an increase in the number of reported cases of syphilis in North America, Europe, and Australia over the past decade. The number of new syphilis infections in Canada has increased roughly 10-fold over the past 10 years.
Since 1943, the antibiotic penicillin has been used to treat syphilis; however, very little information has been gathered to determine the proper dose of penicillin or appropriate duration of treatment. Added to this, several studies have shown that the recommended dose of penicillin fails to cure syphilis in 20-30% of patients. Since the number of people infected with syphilis is increasing, and since syphilis has the potential to cause serious disease, the investigators need better information on how to treat syphilis effectively.
This study aims to determine whether the current dose of penicillin recommended to treat syphilis is sufficient to cure the infection. Specifically the investigators will try to determine whether the amount of penicillin in your blood 3 and 7 days after receiving treatment for syphilis is sufficient to cure the infection as demonstrated by a blood test 6 or 12 months from now. This study is a multi-centered trial based in Ottawa but with centers recruiting both in Montreal and Toronto. A total of 120 participants with syphilis will be recruited into this study. The treatment you will receive for syphilis in this study does not differ from that you would receive normally; the investigators are only observing the levels of penicillin in your blood and relating them with the outcome of treatment.
Study Overview
Status
Intervention / Treatment
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
Ontario
-
Ottawa, Ontario, Canada, K1H 8L6
- The Ottawa Hospital
-
Ottawa, Ontario, Canada, K1N 5P7
- Ottawa Sexual Health Clinic/GayZone
-
Toronto, Ontario, Canada, M5G 2C4
- Toronto General Hospital
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
Participants must meet all of the following criteria to be considered eligible for entry into the study:
- At least 18 years of age
- Presenting with clinical signs of either primary or secondary syphilis; or with early latent syphilis and documented negative serology within the past 12 months.
- Positive syphilis serology (reactive CMIA and TP-PA) with a defined RPR titer at the time of diagnosis and enrolment
- Able to provide informed consent
- Able to communicate in either English of French
- Able to return for follow-up
Exclusion Criteria:
Participants are not eligible to participate in the study if any of the following conditions are met:
- Diagnosis of late latent syphilis, tertiary syphilis, or syphilis of unknown duration
- Allergy to penicillin
- Diagnosis of neurosyphilis requiring treatment with intravenous penicillin
- Treatment with doxycycline or ceftriaxone
- Treatment with more than one intramuscular dose of benzathine penicillin G
- Treatment with any antibiotics within the 6 weeks prior to enrolment
- Pregnant or breastfeeding
- Any immune modulating therapy
- Patient is unable or unwilling to return for blood sampling at 3 and 7 days post treatment
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Syphilis Patients
Individuals presenting for treatment of primary, secondary or early latent syphilis at the Ottawa Hospital Immunodeficiency Clinic, the Ottawa Sexual Health Clinic or its satellite GayZone, the Montreal Chest Institute Immunodeficiency Clinic, or the Toronto General Immunodeficiency Clinic will be invited by their attending health care worker to participate in this study.
Only patients presenting for and requiring treatment of infectious syphilis will be asked to participate.
|
Drug: Benzathine Penicillin G (Bicillin) Dose: 2.4 million units Mode of Administration: intramuscular injection Duration of Treatment: one dose Health Canada approved indication: Yes |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Penicillin and Treatment Failure
Time Frame: 6 months post-treatment
|
To determine if serum penicillin concentrations measured at days 3 and 7 post-treatment differ between those who achieve successful treatment of infectious syphilis versus those who experience treatment failure.
|
6 months post-treatment
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
HIV and Treatment Failure
Time Frame: 6 months post-treatment
|
To determine if serum penicillin levels and treatment failures differ between HIV-positive and HIV-negative individuals.
|
6 months post-treatment
|
Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Paul A MacPherson, MD/PhD, The Ottawa Hospital/The University of Ottawa/OHRI
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- CTN PT-011
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Syphilis
-
Fundación FLS de Lucha Contra el Sida, las Enfermedades...RecruitingPrimary Syphilis | Secondary Syphilis | Early Latent SyphilisSpain, United Kingdom
-
Stanford UniversitySanta Clara Valley Medical CenterWithdrawnCongenital Syphilis | Maternal Syphilis During Pregnancy - Baby Not Yet DeliveredUnited States
-
Hospital de Niños R. Gutierrez de Buenos AiresCompleted
-
MedMira Laboratories Inc.Public Health Agency of Canada (PHAC)RecruitingSyphilis | Syphilis Infection | Early Syphilis, SymptomaticCanada
-
National Taiwan University HospitalChang Gung Memorial Hospital; Kaohsiung Medical University Chung-Ho Memorial... and other collaboratorsCompletedEarly Syphilis | Serologic Response of Syphilis | High Risk BehaviorTaiwan
-
Tulane University School of Public Health and Tropical...University of Zambia; Kinshasa School of Public Health; Instituto de Efectividad...CompletedCongenital SyphilisUnited States, Congo, The Democratic Republic of the, Argentina, Zambia
-
University Hospital, GenevaFonds national SuisseCompleted
-
National Taiwan University HospitalChina Medical University Hospital; Kaohsiung Medical University Chung-Ho Memorial... and other collaboratorsNot yet recruitingEarly Syphilis, Latent, Serological Relapse After Treatment
-
World Health OrganizationUnknown
-
Hospital de Niños R. Gutierrez de Buenos AiresRecruitingChagas Disease | SyphilisArgentina
Clinical Trials on Regular Treatment for Syphilis
-
University of CologneUnknown
-
Centers for Disease Control and PreventionCompleted
-
Shanghai University of Traditional Chinese MedicineUnknown
-
Shanghai Tongji Hospital, Tongji University School...Huashan Hospital; Puer Hospital of Chinese Medicine; Dangyang Hospital of Chinese... and other collaboratorsRecruiting
-
Jakub HadzikWrocław Medical University; Dentsply Sirona Implants and ConsumablesCompletedPartial Edentulism | Tooth Loss
-
Shanghai Tongji Hospital, Tongji University School...Department of Emergence, The First Hospital Affiliated to South China University... and other collaboratorsUnknownMorality | Predictive Model | Risk Factor, SepsisChina
-
Grupo LusófonaUniversity of Lisbon; Fundação para a Ciência e a TecnologiaCompletedObesity | Physical Activity | Sedentary LifestylePortugal
-
Capital Medical UniversityWeihai Municipal Hospital; Heze Municipal Hospital; The Sixth People's Hosptial...Completed
-
GenMont Biotech IncorporationChang Gung Memorial HospitalWithdrawnAlzheimer Disease
-
CHU de ReimsPneumRx, Inc.Unknown