Title:Bovine Lactoferrin can Decrease the In Vitro Biofilm Production and Show Synergy with Antibiotics Against Listeria and Escherichia coli Isolates
Volume: 28
Issue: 1
Author(s): Karla Alejandra García-Borjas, Ivonne Ceballos-Olvera, Sarahí Luna-Castro*Yosahandy Peña-Avelino
Affiliation:
- Faculty of Veterinary Medicine, Autonomous University of Tamaulipas, Victoria,Mexico
Keywords:
Bovine Lactoferrin, Escherichia coli, Listeria, biofilm production, synergy, antibiotics.
Abstract:
Background: Bovine Lactoferrin (bLf) has been reported as antimicrobial, antiviral,
immunomodulatory and anticancer protein. Escherichia coli and Listeria spp. are food-borne bacteria
that can produce illness in human being and mammals, the emergent antimicrobial drug resistance
has been reported in these pathogens.
Objective: The aim for this study was to evaluate the bLf effect on in vitro biofilm production and
the synergic effect of antibiotics on E. coli and Listeria isolates.
Methods: E. coli and Listeria specimens were isolated from bovine carcasses and slaughterhouses
surfaces, respectively. Biofilm formation was analyzed with or without bLf, incubated for 48 h and
spectrophotometry, cell viability was analyzed by colony-forming unit (CFU) and the synergistic
effect of bLf with ampicillin, oxytetracycline, and streptomycin was evaluated through the fractional
concentration index (FCI).
Results: Our results show that a low bLf concentration (0.8 μM) can diminish the in vitro biofilm
production in Listeria isolates; also improves the in vitro oxytetracycline and streptomycin activity
against E. coli, and ampicillin activity against Listeria isolates.
Conclusion: bLf can affect the biofilm production in Listeria isolates from slaughterhouses surfaces
and shown synergic effect with ampicillin. Also has a synergic effect with oxytetracycline
and streptomycin against E. coli isolates from bovine carcasses.