Antimicrobial Properties of Cooked African Locust Beans (Parkia biglobosa) Effluent with and without Its Chaff

Aim: This study aim to determine the antimicrobial properties of the Parkia biglobosa (Jacque Benth.) effluents (waste water from the preparation of Parkia biglobosa). The effluents were tested against some typed and clinical pathogenic microorganisms for their antimicrobial properties using the conventional antibiotics as the control.

Study Design: Effluent with and without chaff is to serve as agents used to determine its antimicrobial properties on the clinical and typed isolates.

Place and Duration of Study: This study was carried out between November- 2015 and July- 2016 at the Department of Microbiology Laboratory, Federal University of Technology Akure, Ondo State, Nigeria.

Methodology: Locust beans bought from “Oja Oba” market, Ikare-Akoko, Ondo state were cooked until the coat was soft and the effluent (waste water from the locust beans) was decanted, cooked again and the effluent with chaffs was also decanted. Both effluents (with and without chaffs) were used against the test and clinical microorganisms using agar well diffusion method. The Minimum inhibitory concentration was carried out using tube dilution method using Mueller Hinton broth.

Results: The typed pathogenic microorganisms were subjected to antimicrobial tests using the P. biglobosa effluents at 100mg/mL; the effluents were able to inhibit S. pyogenes (ATCC 29212) S. aureus (ATCC 43300), S. typhi (ATCC 35240) and E. coli (ATCC 35218) while P. aeruginosa (ATCC 27853) and K. pneumonia (ATCC 48891) were resistant to the effluents. E. coli (ATCC 35218) had the lowest susceptibility at 6.33 ± 0.58bmm and S. pyogenes (ATCC 29212) had the highest susceptibility with 13.00 ± 1.73amm zones of inhibition for the locust beans effluent. For the clinical isolate, the effluent (waste water from the boiled locust beans) and effluent containing chaffs were also able to inhibit S. aureus, S. typhi, E. coli and S. pyogenes. For the effluent containing chaffs, S. aureus had the lowest susceptibility at 2.33 ± 0.58a mm while S. pyogenes had the highest susceptibility at 9.33 ± 0.58a mm. P. aeruginosa and K. pneumoniae isolates were resistant to the effluents.

Conclusion: This study has provided useful information on the antimicrobial activities of the effluents against clinical and typed microorganisms used in this study.