Babies
given antibiotics before they are a year old are more likely to develop eczema,
say British researchers.
After
years of debate about a possible link, a huge study shows taking the drugs in
the first year of life increases the chances of developing the skin disorder by
40 per cent.
Each
additional course of antibiotics further raises the risk of eczema – which
affects one in five children in the UK – by 7 per cent.
About
2.4million of the UK’s 12million children have been diagnosed with the disease,
caused by an over-active immune system and resulting in dry and itchy skin.
Researchers
from Guy’s and St Thomas’ NHS Foundation Trust, King’s College London, the
University of Nottingham and the Aberdeen Royal Infirmary reviewed data from 20
studies involving almost 293,000 babies and children.
Senior
researcher Dr Carsten Flohr, of King’s College and Guy’s, said some previous
studies had implied a link, but this was the first systematic large-scale
review.
He said:
‘We found antibiotic exposure in early life may increase the risk of subsequent
eczema by up to 40 per cent, with broad-spectrum antibiotics having a more
pronounced effect. It’s a real effect.
‘Having
antibiotics in the second year of life is less likely to be important, but we
don’t have the studies to examine it.’
Dr Flohr
recommended that antibiotics should be prescribed ‘with caution’, especially to
infants with a family history of eczema or allergic disease.
But he
stressed: ‘Doctors usually have good reason to prescribe antibiotics to infants.
‘The
importance of this finding is to get a better understanding of the complex
relationship between antibiotic use and allergic disease.
‘We need
further research as determination of a true link between antibiotic use and
eczema would have far-reaching clinical and public health implications.’
The
latest research analysed 16 studies looking at a potential link between eczema
and use of antibiotics in under ones and three more examining a possible link
with exposure in the womb.
One study looked at both, says a report in the British Journal of Dermatology.
One study looked at both, says a report in the British Journal of Dermatology.
Researchers
found a ‘trend’ with prenatal exposure but insufficient evidence to make a
link.
Eczema
has no cure, but medical moisturisers called emollients can be used to keep the
skin lubricated, backed up by steroid creams.
The
proportions of children with eczema has risen from 3 per cent in the 1950s to
20 per cent today.
Rising
allergy levels have several suspected triggers such as too-clean lifestyles,
Caesarean births – which may affect immune systems – diet and the early use of
antibiotics.
Nina
Goad, of the British Association of Dermatologists, said: ‘Eczema is our most
common skin disease.
‘The
evidence is not conclusive and the researchers are not suggesting that parents
should withhold antibiotics from children when doctors feel such treatment is
necessary.
‘But
studies like this give an insight into possible avoidable causes and may help
to guide medical practice.’
Rising
allergy levels have several suspected triggers such as too-clean lifestyles,
Caesarean births – which may affect immune systems – diet and the early use of
antibiotics.
Nina
Goad, of the British Association of Dermatologists, said: ‘Eczema is our most
common skin disease.
‘The
evidence is not conclusive and the researchers are not suggesting that parents
should withhold antibiotics from children when doctors feel such treatment is
necessary.
‘But
studies like this give an insight into possible avoidable causes and may help
to guide medical
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