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Aloysius L D'Souza Care of the
Elderly Section, Faculty of Medicine, Imperial College School of
Medicine, Hammersmith Hospital, London W12 0NN
Correspondence to: A
L D'Souza aloysius.dsouza{at}ic.ac.uk
Objective:
To evaluate efficacy of probiotics in
prevention and treatment of diarrhoea associated with the use of antibiotics.
What is already known on this topic
Conflicting results have prevented probiotics from being accepted as
viable alternatives to conventional treatments for antibiotic
associated diarrhoea The commercial availability of probiotics is increasing What this study adds
The potential of specific probiotics to prevent Clostridium
difficile infection secondary to the use of antibiotics should be
re-examined A large trial looking at the efficacy of probiotics in preventing
antibiotic associated diarrhoea, particularly in elderly patients, with
an emphasis on the optimal dose and cost benefits is needed
Design:
Meta-analysis; outcome data (proportion of patients not getting diarrhoea) were analysed, pooled, and compared to
determine odds ratios in treated and control groups.
Identification:
Studies identified by searching
Medline between 1966 and 2000 and the Cochrane Library.
Studies reviewed Nine randomised, double blind, placebo
controlled trials of probiotics.
Results:
Two of the nine studies investigated the
effects of probiotics in children. Four trials used a yeast
(Saccharomyces boulardii), four used lactobacilli, and one
used a strain of enterococcus that produced lactic acid. Three trials
used a combination of probiotic strains of bacteria. In all nine
trials, the probiotics were given in combination with antibiotics and
the control groups received placebo and antibiotics. The odds ratio in
favour of active treatment over placebo in preventing diarrhoea
associated with antibiotics was 0.39 (95% confidence interval 0.25 to
0.62; P<0.001) for the yeast and 0.34 (0.19 to 0.61; P<0.01 for
lactobacilli. The combined odds ratio was 0.37 (0.26 to 0.53; P<0.001)
in favour of active treatment over placebo.
Conclusions:
The meta-analysis suggests that
probiotics can be used to prevent antibiotic associated diarrhoea and
that S boulardii and lactobacilli have the potential to be
used in this situation. The efficacy of probiotics in treating
antibiotic associated diarrhoea remains to be proved. A further large
trial in which probiotics are used as preventive agents should look at
the costs of and need for routine use of these agents.
Probiotics are well known for their microbiological properties and have
been used to treat gastrointestinal and vaginal mucosal
infections
Probiotics may prevent antibiotic associated diarrhoea
© BMJ 2002
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