A Comparative Study of Randu Honey Antimicrobial Activity from Several Region in Java

Antimicrobial activity dilution diffusion MIC randu honey

Authors

  • Nindya Pramesti Wardani Master Program of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Surabaya, Indonesia
  • Riesta Primaharinastiti
    riesta-p-h@ff.unair.ac.id
    Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Surabaya, Indonesia
  • Achmad Toto Poernomo Department of Pharmaceutical Sciences, Faculty of Pharmacy, Universitas Airlangga, Surabaya, Indonesia
August 6, 2024

Background: Randu honey is monofloral honey sourced from one type plant nectar. The geographical location of randu (Ceiba pentandra) as the source of nectar is one factor that influences antimicrobial activity produced by randu honey. This research used randu honey from several regions in Java such as Sidoarjo (RSH), Pusat Perlebahan Nasional Bogor (RBH), Kediri (RKH), and Malang (RMH). Objective: To compare the antimicrobial activity of several randu honeys (RSH,RBH,RKH,RMH) against Gram-negative Escherichia coli ATCC 25922, Gram-positive Staphylococcus aureus ATCC 6538 and methicillin-resistant Staphylococcus aureus (MRSA) ATCC 33592, Candida albicans ATCC 10231. Methods: This study used well diffusion and dilution antimicrobial test methods. The diameter of inhibition zone formed in well diffusion method is measured using a vernier caliper. The diffusion method was used as screening test before determining quantitative minimum inhibitory concentration (MIC) using serial dilution with a ratio1:2 (v/v). Streptomycin and Ketoconazole were used as positive controls. Nutrient broth and Sabouraud broth media were incubated at 37°C for 24 hours (antibacterial tests) and 25°C for 48 hours (antifungal test) respectively. Results: Well diffusion test revealed all randu honey samples could inhibit test bacteria and fungi with the appearance of an inhibition zone. Diameter inhibition zone ranged from 14.66±0.52mm to 27.86±0.43mm. The MICs of RSH,RBH,RKH,RMH ranged from 3.12% to 25% against all test bacteria and fungi. Conclusion: The results of this study showed randu honey from Bogor (RBH) has the highest antimicrobial activity based on diffusion and dilution tests.

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