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Infect. Immun., 10 1997, 4165-4172, Vol 65, No. 10
RD Wagner, C Pierson, T Warner, M Dohnalek, J Farmer, L Roberts, M Hilty and E Balish
Four species of probiotic bacteria were assessed for their capacities to
protect athymic bg/bg-nu/nu and euthymic bg/bg-nu/+ mice from mucosal and
systemic candidiasis. Each bacterial species and Candida albicans colonized
the gastrointestinal tracts of both strains of mice. The presence of
probiotic bacteria (Lactobacillus acidophilus, Lactobacillus reuteri,
Lactobacillus casei GG, or Bifidobacterium animalis) in the
gastrointestinal tracts prolonged the survival of adult and neonatal
bg/bg-nu/nu mice compared to that of isogenic mice colonized with C.
albicans alone. The incidence of systemic candidiasis in bg/bg-nu/nu mice
was significantly reduced by each of the four probiotic bacterial species.
The numbers of C. albicans present in the alimentary tracts of euthymic
bg/bg-nu/+ mice were significantly reduced by L. casei GG and B. animalis.
None of the probiotic bacteria species completely prevented mucosal
candidiasis, but B. animalis reduced its incidence and severity. Probiotic
bacteria also modulated antibody- and cell-mediated immune responses to C.
albicans. The prolonged survival of mice, decreased severity of mucosal and
systemic candidiasis, modulation of immune responses, decreased number of
C. albicans in the alimentary tract, and reduced numbers of orogastric
infections demonstrated not only that probiotic bacteria have
biotherapeutic potential for prophylaxis against and therapy of this fungal
disease but also that probiotic bacteria protect mice from candidiasis by a
variety of immunologic (thymic and extrathymic) and nonimmunologic
mechanisms in this model.
Copyright © 1997, American Society for Microbiology
Biotherapeutic effects of probiotic bacteria on candidiasis in immunodeficient mice
Department of Medical Microbiology, University of Wisconsin Medical School, Madison 53706-1532, USA.
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