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Biofilm Formation by Staphylococcus Aureus and Salmonella Spp. Under Mono and Dual-Species Conditions and Their Sensitivity to Cetrimonium Bromide, Peracetic Acid and Sodium Hypochlorite

Biofilm Formation by Staphylococcus Aureus and Salmonella Spp. Under Mono and Dual-Species Conditions and Their Sensitivity to Cetrimonium Bromide, Peracetic Acid and Sodium Hypochlorite

Maricarmen Iñiguez-Moreno, Melesio Gutiérrez-Lomelí, Pedro Javier Guerrero-Medina, María Guadalupe Avila-Novoa

Braz J Microbiol. Apr-Jun 2018;49(2):310-319.

PMID: 29100930

Abstract:

The aim of this study was evaluated the biofilm formation by Staphylococcus aureus 4E and Salmonella spp. under mono and dual-species biofilms, onto stainless steel 316 (SS) and polypropylene B (PP), and their sensitivity to cetrimonium bromide, peracetic acid and sodium hypochlorite. The biofilms were developed by immersion of the surfaces in TSB by 10 d at 37°C. The results showed that in monospecies biofilms the type of surface not affected the cellular density (p>0.05). However, in dual-species biofilms on PP the adhesion of Salmonella spp. was favored, 7.61±0.13Log10CFU/cm2, compared with monospecies biofilms onto the same surface, 5.91±0.44Log10CFU/cm2 (p<0.05). The mono and dual-species biofilms were subjected to disinfection treatments; and the most effective disinfectant was peracetic acid (3500ppm), reducing by more than 5Log10CFU/cm2, while the least effective was cetrimonium bromide. In addition, S. aureus 4E and Salmonella spp. were more resistant to the disinfectants in mono than in dual-species biofilms (p<0.05). Therefore, the interspecies interactions between S. aureus 4E and Salmonella spp. had a negative effect on the antimicrobial resistance of each microorganism, compared with the monospecies biofilms.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP57090-A	Cetrimonium bromide		57-09-0	Price

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