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CompletedNCT01475708Updated Mar 24, 2016

Doxycycline in Therapy of Erythema Migrans

An observational study in Lyme Borreliosis, sponsored by University Medical Centre Ljubljana. Completed at 1 site in Slovenia. Open to participants aged 15 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2016-03-24.

Sponsored by University Medical Centre Ljubljana · Observational

Study type
Observational
Model
Case-control
Time perspective
Prospective
Enrollment
400
Ages
15 Years and older
Sex
All
01

Study summary

The investigators will compare the outcome of three groups of erythema migrans patients treated with doxycycline: a group without any accompanying symptoms, with mild symptoms and with severe symptoms that require lumbar puncture.

Read the detailed description

Patients with erythema migrans treated with doxycycline for two weeks will be followed-up for one year (at 2 weeks, 2, 6 and 12 months) clinically and also by filling in the questionnaire to assess the presence of certain symptoms. Also the control group of their friends or relatives without a history of Lyme borreliosis will be included. The presence of their (unspecific) symptoms will also be recorded by the questionnaire at the time of enrollment and at 6 and 12 months.

02

Conditions studied

  • Lyme Borreliosis

Keywords

  • Lyme borreliosis
  • Erythema migrans
  • Doxycycline
  • Subjective symptoms
  • Outcome
03

In context

Lyme Disease

97 studies on the registry are indexed under Lyme Disease; 26 are open to participants now.

This study's enrollment of 400 is close to the median of 400 across 42 observational studies indexed under Lyme Disease.

Browse Lyme Disease studies →

Lead sponsor

University Medical Centre Ljubljana is the lead sponsor of 296 studies on the registry; 72 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
15 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Patients with erythema migrans reffered to Lyme Borreliosis outpatient clinic of the University Medical Center Ljubljana, Slovenia, Department of Infectious Diseases.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • presence of erythema migrans
  • >15 years old

Exclusion criteria

Exclusion Criteria:

  • pregnancy
  • lactation
  • multiple erythema migrans
  • already treated with antibiotic for this episode of Lyme borreliosis
  • allergy to doxycycline
  • treatment with drugs with known interactions with doxycycline
  • cerebrospinal fluid pleocytosis
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Case-control
Time perspective
Prospective
Enrollment
400 participants (actual)
Biospecimen retention
Samples without dna

Groups and cohorts

  • no symptoms

    patients with erythema migrans and no additional newly onset symptoms treated with doxycycline

    Drug: Doxycycline

  • mild symptoms

    patients with erythema migrans and mild unspecific newly onset symptoms treated with doxycycline

    Drug: Doxycycline

  • severe symptoms-lumbar puncture

    patients with erythema migrans and newly onset intense "neurologic" symptoms with lumbar puncture performed, treated with doxycycline

    Drug: Doxycycline

Interventions

  • 100 mg PO bid, 14 days

    Also known as: Doxy

06

What researchers measure

Primary outcomes

  1. Comparing of objective sequelae and post-treatment subjective symptoms in three groups of erythema migrans patients treated with doxycycline: with no accompanying symptoms, with mild and with severe symptoms at the beginning.

    Time frame: 1 year follow-up

Secondary outcomes

  1. Comparison of subjective symptoms between erythema migrans patients treated with doxycycline and control subjects without a history of Lyme borreliosis.

    Time frame: 1 year follow-up

07

Study locations

1 site
  • UMC Ljubljana, Department of Infectious Diseases
    Ljubljana, 1000, Slovenia
08

References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of May 2011, a primary completion of Oct 2014 and a completion of Nov 2014. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Nov 16, 2011
First posted
Nov 21, 2011
Start
May 2011
Primary completionActual
Oct 2014
CompletionActual
Nov 2014
Last update
Mar 24, 2016
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 24, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01475708
Responsible party
Franc Strle (M.D., PhD, University Medical Centre Ljubljana) — Principal investigator
First posted
Nov 21, 2011
Start date
May 2011
Primary completion
Oct 2014
Completion
Nov 2014
Last update
Mar 24, 2016

Study contacts

Franc Strle, MD PhD
study chair · UMC Ljubljana

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2016. You cannot join it, but the record below documents what was studied.

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