A multi-centre randomised placebo-controlled trial of prophylactic enteral lactoferrin supplementation to prevent late-onset invasive infection in very preterm infants.


Recruitment to the ELFIN trial is closed.
We would like to thank all the families and site staff who took part.


  1. ELFIN trial investigators group. Enteral lactoferrin supplementation for very preterm infants: a randomised placebo-controlled trial. Lancet. 2019.
  2. Griffiths J, Jenkins P, Vargova M, Bowler U, Juszczak E, King A, et al. Enteral lactoferrin to prevent infection for very preterm infants: the ELFIN RCT. Health Technol Assess. 2018;22(74):1-60.
  3. Jenkins P, Griffiths J. Lactoferrin supplementation for very preterm infants. Infant. 2014;10(5):147-50.
  4. The ELFIN Trial Investigators Group. Lactoferrin immunoprophylaxis for very preterm infants. Arch Dis Child Fetal Neonatal Ed. 2013;98(1):F2-4.


The ELFIN Trial Investigators Group. Summary Protocol for a Multi-Centre Randomised Controlled Trial of Enteral Lactoferrin Supplementation in Newborn Very Preterm Infants (ELFIN). Neonatology. 2018;114(2):142-8.


This randomised controlled trial will evaluate whether giving very preterm infants supplemental lactoferrin (a natural antibiotic protein from cow's milk) reduces the number of serious infections. About 20% of very preterm infants (born before 32 weeks of gestation) acquire a serious infection in the neonatal unit. Better methods of preventing infection in very preterm infants are needed.

ELFIN will start with a pilot phase in the Northern Region and Yorkshire Neonatal Networks. The main trial will invite participation from very preterm infants cared for in neonatal units across the UK. Treatment will continue until the infants are no longer at high risk of acquiring serious infections (34 weeks postmenstrual age? a maximum of 70 days treatment will be given). As well as comparing the incidence of serious infection between the two groups, we will also assess the effect on the incidence of other serious diseases and death, on the need for infants to receive multiple or prolonged courses of antibiotics (a major cause of antibiotic resistance in neonatal units), and on the length of hospital stay.

Diagram of the ELFIN trial - described below.
This diagram illustrates the path infants will take through the trial. A more detailed description is provided below.

Diagram Description

This diagram is a schematic representation of the ELFIN trial. It is divided into three stages: pre-intervention, intervention and post-intervention.

The pre-intervention stage is divided into 4 steps: pre-term infant, assess for eligibility, obtain parental consent and then randomisation.

The intervention stage shows the two possible treatments that an infant in the trial might receive: either lactoferrin, or a matched placebo. The treatment would start when the infant is receiving minimal milk feeds (at least 12 ml/kg/day) and would stop when the infant is 34 weeks' postmenstrual age.

The post-intervention stage shows that after lactoferrin or placebo treatment is completed, the infant is discharged from hospital. All clinical data collection takes place before the infant leaves hospital.

General Information

EudraCT No.:
REC Reference:
Clinical Trials Unit:
National Perinatal Epidemiology Unit CTU
University of Oxford
NIHR Health Technology Assessment (HTA) Programme
Recruitment Target:
2,200 (including pilot phase)
Duration of Study:
March 2013 - December 2017

Primary Outcome

The primary outcome is the incidence of microbiologically-confirmed or clinically suspected late-onset invasive infection (defined as more than 72 hours after birth) from trial entry until hospital discharge.

Secondary Outcomes

These include:

  • All-cause mortality prior to hospital discharge
  • Necrotising enterocolitis: Bell’s stage II or III
  • Severe retinopathy of prematurity treated medically or surgically
  • Bronchopulmonary dysplasia: where the infant is still receiving mechanical ventilator support or supplemental oxygen at 36 weeks' postmenstrual age
  • Total number of days of administration of antibiotic and antifungal agents
  • A range of health economic outcomes

Contact Details

If you would like to contact the trial team, please email ctu@npeu.ox.ac.uk.

Updated: Tuesday, 16 June 2020 14:38 (v40)