scholarly journals Oral ecology and virulence of Lactobacillus casei and Streptococcus mutans in gnotobiotic rats.

1981 ◽  
Vol 33 (3) ◽  
pp. 690-696 ◽  
Author(s):  
S M Michalek ◽  
M Hirasawa ◽  
H Kiyono ◽  
K Ochiai ◽  
J R McGhee
2006 ◽  
Vol 85 (12) ◽  
pp. 1124-1128 ◽  
Author(s):  
S.C. Venegas ◽  
J.M. Palacios ◽  
M.C. Apella ◽  
P.J. Morando ◽  
M.A. Blesa

Bacterial adhesion onto hydroxyapatite is known to depend on the surface properties of both the biomaterial and the bacterial strain, but less is known about the influence of the composition of the aqueous medium. Here, the adhesion of Streptococcus mutans and 3 different Lactobacilli on powdered hydroxyapatite was shown to change with Ca2+ concentration. The effect depends on the surface properties of each strain. Adhesion of Lactobacillus fermentum and salivarius (and of Streptococcus mutans at low Ca2+) was enhanced with increasing Ca2+ concentration. Lactobacillus casei was efficiently removed by adhesion on hydroxyapatite, even without Ca2+ addition, and the effect of this ion was only marginal. The results are interpreted in terms of Ca2+-mediated adhesion, and relative to the hydrophobic properties of each strain and the electrical properties of the bacterial and solid surfaces (electrophoretic mobility).


2012 ◽  
Vol 13 (4) ◽  
pp. 436-439 ◽  
Author(s):  
Hamid Jafarzadeh ◽  
Maryam Bidar ◽  
Sepideh Hooshiar ◽  
Mahboubeh Naderinasab ◽  
Mostafa Moazzami ◽  
...  

ABSTRACT Aim To compare the antimicrobial effect of 2% chlorhexidine, 2.5% sodium hypochlorite and MUMS containing 2% chlorhexidine. Materials and methods All of the above irrigants were examined on Enterococcus faecalis, Streptococcus mutans, Candida albicans, Lactobacillus casei and E.coli. A total of 0.5 CC of each solution and 0.5 CC of McFarland solution bacterium were added to each examination tube. After 15, 30 and 45 minutes, colony count was performed for each tube. The difference in the number of bacteria indicated the effect taken by disinfectant material. Results MUMS containing chlorhexidine showed the antimicrobial properties just like chlorhexidine's effect against E.coli, Streptococcus mutans, Candida albicans, Enterococcus faecalis and Lactobacillus casei in preventing these entire microorganisms to incubate. Sodium hypochlorite was not effective against Enterococcus faecalis and Candida albicans incubated in 15, 30 and 45 minutes and Enterococcus faecalis in 15 minutes. Conclusion MUMS has antimicrobial properties similar to chlorhexidine. Clinical significance As MUMS containing chlorhexidine can transfer chlorhexidine through its own surfactant around apical area and it can open the dentinal tubules by its own chelator for more penetration of chlorhexidine, it may be a choice for canal irrigation. How to cite this article Bidar M, Hooshiar S, Naderinasab M, Moazzami M, Orafaee H, Naghavi N, Jafarzadeh H. Comparative Study of the Antimicrobial Effect of Three Irrigant Solutions (Chlorhexidine, Sodium Hypochlorite and Chlorhexidinated MUMS). J Contemp Dent Pract 2012;13(4): 436-439.


2014 ◽  
Vol 16 (2) ◽  
pp. 21
Author(s):  
Evelyn Munayco Pantoja ◽  
Hilda Moromi Nakata

El objetivo del presente estudio fue determinar el efecto antimicrobiano y antifúngico del extracto de Allium sativum frente a las cepas ATCC de S. mutans, Capnocytophaga sputigena, Lactobacillus casei y C. albicans a diversas concentraciones. El extracto se obtuvo por el proceso de maceración y para la prueba experimental, se utilizó el método de difusión mediante discos: ciprofloxacino y el fluconazol como control positivo de las bacterias y hongo, respectivamente y el alcohol de 70º como control negativo. Al realizar las pruebas de sensibilidad con el extracto a las concentraciones de 12mg/mL, 18mg/mL 30mg/mL, 60mg/mL, 90mg/mL, 120mg/mL, se obtuvo los siguientes resultados: La concentración antimicrobiana frente al Capnocytophaga sputigena, Streptococcus mutans y Candida albicans, fue de 120mg/mL, teniendo como referencia como estándar al ciprofloxacino a una concentración de 4mg/ml y al fluconazol a una concentración de 2mg/ml. Se concluye que el extracto hidroalcohólico de Allium sativum presentó efecto antimicrobiano frente a la cepa ATCC de S. mutans, Capnocytophaga sputigena, y C. albicans a excepción de Lactobacillus casei que presentó resistencia.


2018 ◽  
Vol 23 (1) ◽  
Author(s):  
Sandra Liana Henz ◽  
Rodrigo Alex Arthur ◽  
Beatriz Carriconde Colvara ◽  
Raísa Severo ◽  
Vinícius Felten

Objetivo: avaliar a atividade antimicrobiana in vitro daplanta Stevia rebaudiana Bertoni e de adoçantes nãocalóricos sobre o crescimento de Streptococcus mutanse Lactobacillus casei, micro-organismos cariogênicospresentes na cavidade bucal. Materiais e método: oestudo foi realizado utilizando as cepas padrões de S.mutans (UA159) e L. casei (ATCC7469). Foram avaliadosdiferentes compostos não calóricos substitutos dasacarose nas concentrações de 1%, 5% e 10%: eritritol(ER), Fit Sucralose® (SU), Stevita® (ST), solução de Steviarebaudiana Bertoni (SSr) e, como controle positivo,digluconato de clorexidina (DC). A análise do efeito inibitóriodesses compostos no crescimento das bactériasfoi feita por meio da técnica de difusão em ágar. Resultado:observou-se que existe um efeito inibitório decrescimento de ambos os micro-organismos por parteda SSr e do ER, enquanto os demais adoçantes testadosnão tiveram efeito inibitório sobre esses micro-organismos.Conclusão: os resultados demonstram que SSR eER apresentam efeito inibidor no crescimento das cepastestadas de S. mutans e L. casei. Palavras-chave: Adoçante natural. Cárie dentária. Lactobacilluscasei. Stevia. Streptococcus mutans.


Author(s):  
Raul Alberto Morales Luckie ◽  
Rafael Lopez Casatañares ◽  
Rogelio Schougall ◽  
Sarai Carmina Guadarrama Reyes ◽  
Víctor Sanchez Mendieta

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