Acta Univ. Agric. Silvic. Mendelianae Brun. 2026, 74(3), 99-106 | DOI: 10.11118/actaun.2026.009

Microencapsulation of Muntingia calabura Leaf Kombucha: Effects on Microbial Viability, Antibacterial Activity, and Antibiotic Interactions

Marsudi1, Sari Rahayu Rahman2, Jisril Palayukan1, Deka Uli Fahrodi1, Nur Saidah Said1
1 Department of Animal Husbandry, Faculty of Animal Husbandry and Fisheries, Universitas Sulawesi Barat, 91412, Majene, Indonesia
2 Department of Biology Education, Faculty of Teacher Training and Education, Universitas Sulawesi Barat, 91412, Majene, Indonesia

Kombucha is a fermented beverage rich in organic acids and bioactive compounds with potential antimicrobial properties; however, its microbial stability remains a challenge. This study evaluated the effects of microencapsulation on microbial viability, antibacterial activity, and antibiotic interactions in Muntingia calabura leaf kombucha. Microencapsulation was performed using maltodextrin, skim milk, and gum arab, followed by freeze-drying. Microbial viability was assessed using plate counts, antibacterial activity was evaluated by agar diffusion against Escherichia coli and Staphylococcus aureus, and antibiotic interaction was examined using a modified disc diffusion method. The microencapsulated samples exhibited higher recoverable viable counts upon reconstitution (6.27 × 107 CFU/mL; log 7.79 ± 0.08) compared with liquid kombucha (3.19 × 107 CFU/ mL; log 7.50 ± 0.04; p < 0.05), which is primarily attributed to concentration effects and the protective properties of the encapsulating matrix. Antibacterial activity was generally preserved after microencapsulation, with comparable inhibition zones observed for both test organisms, although minor variations occurred across concentrations. Furthermore, the presence of kombucha influenced the inhibition zones of selected antibiotics, indicating potential modulatory interactions; however, these findings should be interpreted cautiously due to methodological constraints and the use of complex mixtures. In conclusion, microencapsulation can preserve microbial viability and antibacterial activity of M. calabura kombucha, supporting its potential application in functional food development. Nevertheless, further studies on microbial characterization, storage stability, and gastrointestinal simulation are required to fully elucidate its functional efficacy.

Keywords: antibacterial activity, kombucha, microencapsulation, Muntingia calabura, probiotic

Received: September 28, 2025; Revised: April 9, 2026; Accepted: April 20, 2026; Published: July 1, 2026  Show citation

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Marsudi,, Rahman, S.R., Palayukan, J., Uli Fahrodi, D., & Said, N.S. (2026). Microencapsulation of Muntingia calabura Leaf Kombucha: Effects on Microbial Viability, Antibacterial Activity, and Antibiotic Interactions. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis74(3), 99-106. doi: 10.11118/actaun.2026.009
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