2. Article to be discussed
Bifi dobacterium breve BBG-001 in very preterm
infants: a randomised controlled phase 3 trial
Kate Costeloe, Pollyanna Hardy, Edmund
Juszczak, Mark Wilks, Michael R Millar, on
behalf of The Probiotics in Preterm Infants Study
Collaborative Group
Published Online November 25, 2015 in
www.thelancet.com
3. Background –What is known?
Probiotics may reduce necrotising enterocolitis and
late-onset sepsis after preterm birth.
However, there has been concern about the rigour
and generalisability of some trials and there is no
agreement about whether or not
they should be used routinely.
4. Lacunae in previous studies
A small number of trials of probiotic in preterm
infants have been performed and the analysis
suggested reduced necrotising enterocolitis and
death, but with no effect on sepsis.
5. NEC in a Glance.
Most serious GI disease of the preterm infant.
Prematurity is the single greatest risk factor.
Approx 10% infants with NEC term.
Pathogenesis is Multifactorial.
Formula feed increases the risk of NEC.
Pneumatosis Coli : Rare & more benign form of NEC
6. BELL Staging for NEC
Stage 1 (Suspected) : Includes clinical signs & symptoms and
nondiagnostic radiographs.
Stage 2 (Definite) : Includes clinical and laboratory signs and
pneumatosis intestinalis and/or portal venous gas on radiographs.
a.Mildly ill
b. Moderately ill with toxicity
Stage 3 (Advanced) : Includes more severe clinical signs and
laboratory abnormalities,Pneumatosis intestinalis, and /or potal
venous gas on radiographs.
a) Critically ill & impending intestinal perforation.
b) Critically ill with pneumoperitoneum.
7. Objective
To test the effectiveness of the probiotic
Bifi dobacterium breve BBG-001 to reduce
necrotising enterocolitis, late-onset sepsis, and
death in preterm infants.
8. Setting
Multicentre randomised controlled phase 3 study,
recruiting infants born between 23 and 30 weeks’
gestational age within 48 h of birth from 24 hospitals
within 60 miles of London in Southeast England.
Between July 1, 2010, and July 31, 2013.
9. Sample Size
A total of 1315 infants were recruited.
Of the total infants selected, 654 were allocated to
probiotic and 661 to placebo.
Five infants had consent withdrawn after
randomisation, thus 650 were analysed in the
probiotic group and 660 in the placebo group
10. Randomisation & Masking
Procedure completed within 48hrs of birth.
Randomly assigned.
Parents, clinicians and outcome assessors were
masked to the treatment allocation.
11. Treatment For
The hypothesis supporting the use of probiotic
bacteria to prevent necrotising enterocolitis and
sepsis is that their administration to the preterm
infant will encourage gut microbiota resembling that
of the term infant, strengthen intestinal barrier
function, and, thereby, protect the infant.
12. Parameters
3 primary outcomes were checked:
1) Any episode of necrotising enterocolitis Bell
stage 2 or 3;
2) Sepsis ( blood culture positive)
3) Death before discharge from hospital.
14. Conclusion
There is no evidence of benefit for this
intervention in this population; this result does
not support the routine use of B breve BBG-001
for prevention of necrotising enterocolitis and
late-onset sepis in very preterm infants.
15. Strength
The strengths of this trial are three-fold:
1) First, its size, which combined with the reported
rates of necrotising enterocolitis and sepsis, provide
it with statistical power to give clear answers;
2) The combination of early recruitment, broad
eligibility criteria, and early commencement of the
intervention.
3) Reporting of probiotic stool colonisation rates that
inform the interpretation of the findings.
16. Implication to Practice
The importance of the microbiome in the complex
pathogenesis of necrotising enterocolitis is widely
accepted.
As understanding progresses so the rationale for the
choice of probiotics that might have a therapeutic
role either alone or in combination, and of which
infants might benefit, should strengthen.
The evidence from this trial does not support the
routine administration of probiotics to the preterm
infant.
