Lactobacillus is able to alter the virulence and the sensitivity profile of Candida albicans.
OBJECTIVE
The study investigated whether the interaction with Lactobacillus rhamnosus (ATCC7469) interfere with the expression of virulence factors by Candida albicans (ATCC18804).


RESULTS
These micro-organisms were grown in biofilms for 24, 48 and 72 h, Candida was isolated and the expression of the major virulence factors were investigated. The production of phospholipase, protease and haemolysin were observed in appropriate media; observation of germ tubes formation in serum; biofilm formation, after growth in microtitre plates and reading in spectrophotometer. Candida was also tested for antifungal sensitivity to amphotericin B, fluconazole and ketoconazole. The results were compared with the cells of Candida grown in the absence of lactobacilli (control group). Candida cells, which interacted with Lact. rhamnosus (test group), showed significantly lower proteinase and haemolysin activity, when compared with control group. The germ tube formation and biofilm formation capacity also decreased in tested groups, which demonstrated alterations in susceptibility to antifungal drugs.


CONCLUSIONS
The results suggest that Lact. rhamnosus is able to influence the expression of virulence factors by C. albicans and can alter its antifungal sensitivity profile.


CONCLUSIONS
These results suggest reduction in the pathogenicity of Candida and improvement in candidiasis therapy and control.
Institute of Basic Biosciences, School of Medicine, University of Taubaté, São Paulo, Brazil.
V M C
http://orcid.org/0000-0001-6476-1616
VM
Oliveira
Institute of Basic Biosciences, School of Medicine, University of Taubaté, São Paulo, Brazil.
S S F
SS
Santos
Institute of Basic Biosciences, School of Medicine, University of Taubaté, São Paulo, Brazil.
C R G
CR
Silva
Institute of Basic Biosciences, School of Medicine, University of Taubaté, São Paulo, Brazil.
A O C
AO
Jorge
Institute of Basic Biosciences, School of Medicine, University of Taubaté, São Paulo, Brazil.
M V P
MV
Leão
D000935:Antifungal Agents / Q000494:pharmacology; D018441:Biofilms / Q000254:growth & development; D002176:Candida albicans / Q000187:drug effects* / Q000302:isolation & purification / Q000472:pathogenicity* / Q000502:physiology; D052201:Lacticaseibacillus rhamnosus / Q000502:physiology*; D056265:Microbial Interactions; D037521:Virulence Factors / Q000378:metabolism
D000935:Antifungal Agents; D037521:Virulence Factors

Candida
; 
Lactobacillus
; biofilm; probiotics; virulence factors