Antimicrobial Effects of Aqueous Extract of Garcinia Kola Nuts on Salmonella Isolates from Chicken Dropping in Southern Taraba, North East, Nigeria

Abstract

Aim: The onerous threat of antimicrobial resistance to public health highlights the need for continuous research that will discover more potential medicinal plants that possess inhibitory potentials on bacteria especially those with multidrug-resistant qualities. Hence, this study investigated the antibacterial effect of hot and cold aqueous extracts of Garcinia Kola on Salmonella isolates.
 Study Design: This is experimental research involving fecal sample of chicken.
 Place and Duration of Study: This research was carried out in Wukari metropolis.
 Study Design: Sterile universal containers were used to collect one gram each of chicken fecal samples from domestic chicken coops and dissolved in Buffered Peptone Water to recover injured cell. A loop-full of the sample was streaked on prepared Salmonella-Shigella Agar plates. Suspected isolates were confirmed molecularly using PCR to identify the invA virulent gene from the isolate. Hot and cold water served as a menstruum for extracting bioactive contents from Garcinia Kola. Following evaporation of the crude hot and cold-water extracts, 0.25 mg, 0.5 mg, 1.0 mg, and 2.0 mg of the extract were respectively dissolved into 10 ml of distilled water. The Agar-well diffusion method was used in conducting the antimicrobial susceptibility tests.
 Results: Significant zone of inhibition (ZIB) of 9 mm, 12 mm and 17 mm was observed for isolates subjected to 0.50 mg-10 ml, 1.00mg-10 ml, and 2.00 mg-10 ml concentrations of cold-water extracts respectively while No zone of Inhibition (NZI) was observed at 0.25 g-10 ml concentrations. For hot water extracts, growth inhibition ranging from 9 mm, 11 mm, 15 mm, and 23 mm was respectively noticed for concentrates of 0.25 mg-10 ml, 0.50 mg-10, 1.00 mg-10 ml, and 2.00 mg-10 ml. Heavy growth persisted for the negative control plate which contained distilled water without extracts. Augmentin 30 µg was used as a positive control (≥31 mm).
 Conclusion: This research simply has amplified the medicinal importance of the consumption of Garcinia Kola particularly as it relates to the management of gastroenteritis caused by Zoonotic Non-enteric Salmonella. However, the clinical toxicity and safety of the plant need more understanding.