In vitro anti-inflammatory and antimicrobial activity of Securidaca longepedunculata and Annona senegalensis hydro-alcoholic extract

Abstract

Annona senegalensis and Securidaca longepedunculata are two plants traditionnaly used in inflammation and wounds infection treatment after snakebites.
 This study aims to investigate the in vitro anti-inflammatory and antimicrobial activities of the hydroalcoholic extracts of Annona senegalensis and Securidaca longepedunculata.
 Antimicrobial activity of the two plant extracts was examined against five bacterial strains with the well diffusion method and the inhibition zones diameters (IZD), minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined using the 96-well microplate dilution method. While antiinflammatory activity was assessed by the albumin denaturation method.
 The results obtained showed that the hydroalcoholic extract of Annona senegalensis has antimicrobial property against Staphylococcus aureus (IZD=12.22 ± 0.24 mm, MIC=62.5 mg/mL, MBC=125 mg/mL) and against Pseudomonas aeruginosa (IZD=12.06 ± 0.06 mm, MIC=125 mg/mL, MBC=250 mg/mL). Securidaca longepedunculata also showed its antimicrobial activity against Staphylococcus aureus (IZD=12.03 ± 0.03 mm, MIC=125 mg/mL, MBC=250 mg/mL) and Candida albicans (IZD=12.12 ± 0.07 mm, MIC=62.5 mg/mL, MFC=125 mg/mL).
 In the order hand, Annona senegalensis and Securidaca longepedunculata exhibited concentration-dependent anti-inflammatory activity by reducing significantly (p<0.001) the denaturation of BSA. In addition S. longepedunculata inhibited haemolysis significantly (p<0.001) more than Diclofenac sodium at 200 and 400 µg/mL.
 Hence, it was concluded that Annona senegalensis and Securidaca longepedunculata possessed anti-inflammatory and antimicrobial properties and can be used in the treatment of inflammation and wounds infection after snakebites.
 Keywords: Annona senegalensis, Securidaca longepedunculata, anti-inflammatory, antimicrobial, BSA.