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Completed

NCT Number: NCT01202331

Tripartite International Research for the Elimination of Trachoma

Mass antimicrobial administrations have been remarkably successful in reducing the prevalence of the ocular strains of Chlamydia that cause trachoma. Repeated distributions progressively lower the prevalence of infection, and in some cases may even result in local elimination. Mass treatments cannot be continued forever, due to concerns about cost and antibiotic resistance. The hope has been that other measures such as latrine construction and hygiene programs would prevent infection from returning. Unfortunately, no non-antibiotic measure has yet demonstrated an effect on infection.

1. We hypothesize that Chlamydial infection will return to communities when treatment ends. 2. We hypothesize that infection will be completely eliminated in all communities treated for seven years. 3. We hypothesize that identifying and treating clinically active cases among preschool aged children will delay or even prevent reemergence at a far lower cost than mass treatment of all individuals.

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Key information

Conditions

Trachoma Bacterial Infections Bacterial Infections and Mycoses Chlamydia Chlamydia Infections Chlamydiaceae Infections Communicable Diseases Conjunctival Diseases Conjunctivitis Conjunctivitis, Bacterial Corneal Diseases Eye Diseases Eye Infections Eye Infections, Bacterial Genital Diseases Gram-Negative Bacterial Infections Infections Sexually Transmitted Diseases Sexually Transmitted Diseases, Bacterial Urogenital Diseases

Age range

1 day and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

The Carter Center, Ethiopia

Addis Ababa, Ethiopia

About this study

The proposed study is a group-randomized trial to determine the frequency and treatment target of community-wide mass antibiotic treatment to eliminate trachoma. We will continue to monitor a sub-set of communities from our TANA study, in Goncha Siso Enese district of East Gojam Zone, Ethiopia. Here we evaluate how infection returns when antibiotics are discontinued, whether infection can be predictably eliminated, and whether infection can be prevented from returning with targeted treatment strategies:

Specific Aim 1. To determine whether antibiotics can be stopped after 4 years.

Specific Aim 2. To determine whether infection can be completely eliminated if mass treatments continue for seven years.

Specific Aim 3. To determine whether treatment targeted to pre-school aged children, or to households in which a pre-school aged child has clinically active trachoma, will prevent infection from returning into the community.

Specific Aim 4: To determine whether mass azithromycin distributions reduce visits to local health clinics due to all causes and infectious causes.

Specific Aim 5: To determine whether mass azithromycin distributions result in better growth metrics (weight-for-height, height-for age, weight-for-age, middle upper arm circumference) compared to no treatment.

Specific Aim 6: To determine whether under-5 mortality is lower in communities treated with mass azithromycin compared to no treatment

Specific Aim 7: To determine whether macrolide resistance in Streptococcus pneumoniae, Hameophilus influenzae, and Staphylococcus aureus is more prevalent in communities treated with biannual mass azithromycin compared to communities treated with annual mass azithromycin, and to determine whether targeted azithromycin treatments result in less macrolide resistance compared to mass azithromycin distributions.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • All residents residing in the state-teams which are randomly selected for this study.

Exclusion criteria

  • Pregnant women
  • Children under 6 months of age
  • All those who are allergic to macrolides or azalides
  • Refusal of village chief (for village inclusion), or refusal of parent or guardian (for individual inclusion)

Individuals in these three exclusion criteria will not be given the study antibiotic azithromycin, but offered the current WHO-recommended alternative treatment to azithromycin for active trachoma, which is 1% tetracycline eye ointment, to be used twice a day, topically to both eyes, for six weeks. Note that the exclusion criteria refer to the exclusion to the treatment drug, but not to the monitoring, treatment of trachoma, and examinations.

Treatment and study plan

mass treatment with oral azithromycin

Drug

For baseline and follow-up surveys prior to azithromycin distribution, a stratified random sample from two age groups will be chosen: 1) 60 study participants younger than 10 years old and 2) 60 study participants aged 10 years and above. Clinical examination will be performed and conjunctival swabs will be taken from all the study participants. Nasopharyngeal swabs will be collected in each community from 15 randomly selected children among the 60 participants under age 10 who were recruited for conjunctival swabbing. Then a single dose of azithromycin will be distributed according to study design: in tablet form for adults; a weight-adjusted tablet dose for children ages 8-10; and pediatric suspension for children ages 1 - 7.

Other names: Zithromax

Primary outcomes

  1. The average prevalence of ocular chlamydia infection in communities in an arm as determined by pooled NAAT (Nucleic Acid Amplification Test)(at 36 months versus 0 months for Aim 1, at 36 months for Aim 2 and Aim 3)

    Time frame: 36 months

Secondary outcomes

  1. Clinical active trachoma in community, as determined by the WHO simplified grading system

    Time frame: 36 months

  2. Childhood mortality (6 months -5 years of age), 6-10 years of age, and >10 years

    Time frame: 36 months

  3. Macrolide resistance in pneumococcus, Haemophilus influenzae, and Staphylococcus aureus (% resistance over time, clustered by randomization unit)

    Time frame: 36 months

  4. Anthropometric measurements (weight and height), as outlined by WHO child growth standards (0-5 years of age)

    Time frame: 3, 12, 24, and 36 months after baseline

  5. Health clinic visits (due to all causes and due to infectious causes) in children aged 6 months-5 years, 6-10 years, and >10 years

    Time frame: 36 months

  6. Prevalence of anemia (hemoglobin levels in 0-9 year olds) and the prevalence of malaria

    Time frame: 36 months

  7. Clinically active trachoma in a school (all children under age 10), as determined by the WHO simplified grading system

    Time frame: 36 months

  8. Cost-effectiveness of mass azithromycin administration, per infection year prevented and cost per eliminated village

    Time frame: 0, 12, 24, and 36 months

  9. Estimate of chlamydial load from real-time, qPCR

    Time frame: 0, 12, 24, 36 months

Sponsors and collaborators

Lead sponsor

University of California, San Francisco

Other

Registry information

Acronym: TIRET

Important dates

Study start
2010
Primary completion
2013
Study completion
2014
First posted
Sep 15, 2010
Registry last updated
Oct 11, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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