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Our results showed that in addition to the SOS response, the stringent response (induced upon starvation) is specifically involved in the regulation of class 1 integron integrases in biofilms. This study shows that biofilms are favorable environments for integron-mediated acquisition/exchange of antibiotic resistance genes by bacteria and for the emergence of multidrug-resistant bacteria. 5-hydroxymethyl-2-furaldehyde impairs Candida albicans - Staphylococcus epidermidis interaction in co-culture by suppressing crucial supportive Polymicrobial biofilms involving fungal-bacterial interactions are stated to modulate host immune response and exhibit enhanced antibiotic resistance. In Seebio Colanic acid compound , clinically important opportunistic pathogens Candida albicans and Staphylococcus epidermidis associate synergistically and instigate implant and blood stream infections. Impediment of virulence traits that support successive pathogenic lifestyle and inter-kingdom interactions without altering the microbial growth represents an attractive alternate strategy. To accomplish this objective, 5-hydroxymethyl-2-furaldehyde (5HM2F), a reported antibiofilm agent repressed the biofilm formation of S.
epidermidis and mixed-species at 300 μg/mL and 400 μg/mL, respectively without modulating the growth. Microscopic analyses and phenotypic assays explicated the competency of 5HM2F to impede biofilm fungal-bacterial interaction. Further, 5HM2F greatly reduced the secreted hydrolases production. Reduced content of biofilm matrix components upon 5HM2F treatment was believed to be the underlying reason for enhanced antibiotic and/antifungal susceptibility. Additionally, qPCR analysis correlated well with in vitro bioassays wherein, 5HM2F was identified to repress the expression of important genes associated with hyphal morphogenesis, adhesion, biofilm formation and virulence in both mono-species and mixed-species. Reduced virulence and colonization of mono-species and mixed-species in 5HM2F treated Caenorhabditis elegans substantiated the antibiofilm and antivirulence potential of 5HM2F. Overall, this study proposes 5HM2F as a potent therapeutic candidate against single and mixed-species biofilm infections of C.
albicans and S. In vitro and in vivo biofilm inhibitory efficacy of geraniol-cefotaxime combination against Staphylococcus spp. In humans, the occurrence of bacterial communities in the form of biofilm is considered as a major intrinsic factor accountable for a variety of stubborn infections. Staphylococcus aureus and S. epidermidis have gained considerable attention in clinical settings owing to the formation of intractable and long-lasting biofilms in medical device. The current study has been designed to explain the biofilm inhibitory efficacy of geraniol and cefotaxime combination biomass quantification assay was performed to evaluate the antibiofilm activity of GCC against S. epidermidis and MRSA.
The minimal biofilm inhibitory concentration of GCC was found to be 100 μg/ml of geraniol and 2 μg/ml of cefotaxime. Further, microscopic analyses ascertained the devastating potential of GCC on the test pathogens' biofilm formation. Besides biofilm inhibition, GCC also suppressed the production of extracellular polymeric substance, slime and staphyloxanthin. Colanic acid polymer , GCC significantly increased the susceptibility of the test pathogens towards human blood. Further, the results of real time PCR analysis and in vivo assay using Caenorhabditis elegans unveiled the anti-biofilm potentials of GCC. Thus, the present study demonstrates the significant use of polytherapy treatment approaches to overcome the biofilm associated infections of Staphylococcus spp. Effects of DNase I coating of titanium on bacteria adhesion and biofilm The removal of mature biofilm from the surface of implant has been a formidable challenge in treating implant-associated infection.
Prevention of biofilm formation rather than removal of existing biofilm is a more effective approach. Immobilization of biofilm-dispersing enzymes on material surfaces is regarded as one of the most promising strategies. Deoxyribonuclease I (DNase I) can degrade extracellular DNA (eDNA) and then destabilize biofilm. In this study, DNase I was immobilized on a titanium (Ti) surface by using dopamine as an intermediate. The water contact angle, SEM, EDS and XPS confirmed that DNase I was successfully coated to the bare Ti and the final coating was highly hydrophilic. The DNase I coating showed significant effects in preventing Streptococcus mutans (S. mutans) and Staphylococcus aureus (S.
aureus) adhesion and biofilm formation over a time span of 24h. The favorable biocompatibility was demonstrated by cell study in vitro.
Here's my website: https://en.wikipedia.org/wiki/Colanic_acid
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