Elucidation Of Inhibitory Effect of Ethanolic And Aqueous Extracts Of Aurantii Fructus Immaturus On Methicillin-Resistant Staphylococcus aureus (MRSA) Biofilm For Potential Infected Wound Treatment

1. Introduction

MRSA, or methicillin-resistant Staphylococcus aureus, is a type of bacteria that has developed resistance to methicillin and other related antibiotics.
MRSA has become a significant public health concern due to its ability to cause infections that are difficult to treat.
The prevalence of MRSA infections has increased in healthcare settings, leading to higher mortality rates and increased healthcare costs.

Biofilm is a community of microorganisms encased in a self-produced matrix and adhered to a surface.
MRSA biofilm formation is a significant problem in the treatment of infections, as it makes the bacteria more resistant to antibiotics and more difficult to eradicate.
The ability of MRSA to form biofilms increases the risk of persistent and recurrent infections, posing a significant challenge to healthcare providers.

The objective of this study is to investigate the inhibitory effect of ethanolic and aqueous extracts of Aurantii Fructus Immaturus on MRSA biofilm formation, with the aim of exploring potential treatments for infected wounds.

Aurantii Fructus Immaturus, also known as immature orange fruit, is the unripe fruit of the Citrus reticulata Blanco.
It has been traditionally used in Chinese medicine for its antimicrobial properties.
The study used both ethanolic and aqueous extracts of Aurantii Fructus Immaturus to evaluate their effects on MRSA biofilm formation.

The study employed a broth microdilution method to assess the minimum inhibitory concentration (MIC) of the extracts against MRSA.
The biofilm formation assay was used to evaluate the inhibitory effect of the extracts on MRSA biofilm formation.
The viability of MRSA cells in the biofilm was assessed using a colony-forming unit (CFU) assay.

The results showed that both ethanolic and aqueous extracts of Aurantii Fructus Immaturus significantly inhibited MRSA biofilm formation.
The ethanolic extract exhibited a stronger inhibitory effect than the aqueous extract.
The extracts reduced the viability of MRSA cells in the biofilm, indicating their potential to eradicate established MRSA infections.

The study explored the possible mechanism of action of the extracts on MRSA biofilm formation.
It was found that the extracts could disrupt the biofilm matrix, making it more susceptible to antibiotics and host defenses.
The extracts also exhibited antimicrobial properties, which could directly kill MRSA cells in the biofilm.

The findings of this study suggest that Aurantii Fructus Immaturus could be a potential natural treatment for MRSA infections, particularly in cases where conventional antibiotics are ineffective.
The use of natural extracts as an alternative or complementary treatment for MRSA infections could provide a valuable resource for healthcare providers.
Further research is needed to explore the clinical application of these extracts and to determine their safety and efficacy in humans.

The study had several limitations, including the use of in vitro models and the need for further preclinical and clinical trials.
The study did not investigate the potential synergistic effects of the extracts with conventional antibiotics.
The study also did not explore the potential side effects or interactions of the extracts with other medications.

The study demonstrated that ethanolic and aqueous extracts of Aurantii Fructus Immaturus have a significant inhibitory effect on MRSA biofilm formation.
These findings provide a basis for further research on the potential use of these extracts in the treatment of MRSA infections.
Future studies should focus on clinical trials to assess the safety and efficacy of these extracts in humans.