Although under-5 mortality rates are declining globally, neonatal mortality remains persistently high in many regions of sub-Saharan Africa. Mass azithromycin distribution to children aged 1-59 months has been shown to reduce childhood mortality in Niger, Tanzania, and Malawi. This study did not evaluate the effect of azithromycin administered during the neonatal period. Observational evidence from high income countries has suggested that macrolides, including erythromycin and azithromycin, may be associated with increased risk of development of infantile hypertrophic pyloric stenosis (IHPS). However, these studies are limited by confounding by indication, as infants only receive antibiotics when they are ill.

The investigators proposed an individually randomized trial of azithromycin versus placebo to establish the efficacy and safety of administration of a dose of azithromycin during the neonatal period. The long-term goal is generate evidence that can be used by neonatal and child survival programs related to the use of azithromycin in the youngest children who have the highest risk of mortality. The investigators hypothesize that a single dose of azithromycin administered in the neonatal period will lead to significantly reduced risk of mortality and that this dose will be safe.

Objectives

1. Establish the efficacy of a single dose of azithromycin administered during the neonatal period compared to placebo in infants 8 to 27 days of life for reduction in all-cause mortality.
2. Establish the safety of a single dose of azithromycin administered during the neonatal period.

This study will be conducted in several regions of Burkina Faso, including peri-urban areas of Ouagadougou and Nouna town, and rural areas that are within 4 hours' drive of a pediatric facility with capacity for performing pyloromyotomy

Child mortality in West Africa is among the highest in the world. Although child health and mortality are improving worldwide, children in the Sahel and sub-Sahel regions of West Africa have the greatest risks of mortality. Burkina Faso's current under-5 mortality rate is estimated 110 per 1,000 live births. Similar to other countries in the region, the major causes of child mortality in Burkina Faso are malaria, respiratory tract infection, and diarrhea. Malnutrition acts as a major underlying contributor to mortality. Neonatal mortality remains persistently high, with approximately 1/5th of neonatal mortality due to pneumonia, meningitis, and sepsis. Interventions that address these underlying causes may be particularly efficacious for reducing mortality.

Younger children at are at a higher risk of mortality. Approximately 2/3rd of under-5 deaths occur during the first year of life. In general, the child mortality rate decreases as age increases. While some improvement has been observed, neonatal mortality is declining at a slower rate than post-neonatal childhood mortality. Many child health interventions are designed specifically for children over 6 months of age, such as vitamin A supplementation, seasonal malaria chemoprevention, and lipid-based nutritional supplementation. Identification of strategies that are safe and effective for the youngest children will be required to address persistently high rates of neonatal and infant mortality.

The MORDOR I study demonstrated a significant reduction in all-cause child mortality following biannual mass azithromycin distribution. Across three diverse geographic locations in sub-Saharan Africa (Malawi, Niger, and Tanzania), biannual mass azithromycin distribution over a two-year period led to a 14% decrease in all-cause child mortality. In Niger, 1 in 5-6 deaths were averted. These results are qualitatively similar to those of a previous study of mass azithromycin distribution for trachoma control in Ethiopia, which found reduced odds of all-cause mortality in children in communities receiving mass azithromycin compared to control communities.

In MORDOR I, the strongest effect of azithromycin was in the youngest cohort of children. Across all three countries, the strongest effect of azithromycin was consistently in children 1-5 months of age, with an approximately 25% reduction in all-cause mortality. However, MORDOR I was not optimized to target the youngest age groups. Although children as young as 1 month were eligible, biannual distributions might not reach some children until 7 months of age. On average, children were first treated at 4 months. Given that there may be a substantial benefit to treating children at younger ages, azithromycin strategies that are designed to target younger age groups may be even more beneficial for reducing child mortality.

Here, the investigators propose a randomized controlled trial designed to evaluate the efficacy of a dose of azithromycin administered during the neonatal period for prevention of mortality within in the first 6 months of life. The investigators propose to randomize births in several geographic regions of Burkina Faso to a single dose of azithromycin or placebo between day 8 and 27 of life. This study is designed to provide evidence of the efficacy of azithromycin treatment for the youngest children.

Communities

Inclusion Criteria:

• Within 4 hours of a facility that can provide services for pyloromyotomy (Ouagadougou or Bobo Dioulasso)
• Accessible during the rainy season
• Ultrasound machine available OR a facility in which an ultrasound machine could be placed is within 1 hour

Exclusion Criteria:

• Refusal of village chief

Individuals:

Inclusion Criteria:

• Weight over 2500 g
• Able to feed orally
• Family intends to stay in study area for at least 6 months
• Appropriate consent from at least one caregiver
• No known allergy to azalides
• Not living within one of the communities included in the community study(CHAT/CHATON)
• No hepatic failure manifested by neonatal jaundice

Exclusion Criteria:

• Weight <2500 g
• Unable to feed orally
• Family planning to move
• Mother/caregiver not willing to participate
• Allergic to azalides
• Living in one of the communities included in the community study (CHAT/CHATON)
• Hepatic failure manifested by neonatal jaundice

De-identified data will be available as per the Bill and Melinda Gates open access policy. Individual participant data will be available that underline the reported results (texts, tables, figures, and appendices). The study protocol and statistical analysis plan will also be made available. The data will be available following publication in accordance with the BMGF guidelines.

The data will be available following publication, without any embargo period.

12 months

Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)