Pengaruh Asam Asetat Buah Kedondong (Spondias dulcis), Kitosan, dan Minyak Atsiri Jahe Merah (Zingiber officinale var. rubrum) Terhadap Zona Hambat Pertumbuhan Bakteri Escherichia coli
Kartika Medha Rinjani, Prof. Dr. drg. Archadian Nuryanti, M.Kes. ; Bekti Nur’aini, S.Kp.G., M.P.H.
2025 | Skripsi | PENDIDIKAN DOKTER GIGI
Escherichia coli can contaminate the oral cavity through water used during dental procedures, which may be harmful especially for patients with low immunity. Although chlorhexidine is the standard antiseptic and is highly effective, long-term use may disturb the balance of the oral microbiome. Therefore, a natural and safe mouthwash alternative is needed. This study aimed to determine the effect of a nanoemulsion combining kedondong fruit acetic acid (Spondias dulcis), chitosan, and red ginger essential oil (Zingiber officinale var. rubrum) on the inhibition zone of Escherichia coli.
This research was an in vitro laboratory experiment using the disc diffusion method. Antibacterial testing was carried out against Escherichia coli ATCC 25922 with three groups: a negative control (1% chitosan), a positive control (0.2% chlorhexidine), and the nanoemulsion treatment. Each group was tested five times. Inhibition zones were measured using a caliper with 0,001 mm precision. The mean inhibition zone diameters were 6,346 mm for the negative control, 10,475 mm for the treatment group, and 15,751 mm for the positive control.
One-way ANOVA showed a significant effect of the nanoemulsion containing 1% kedondong fruit acetic acid, 1% chitosan, and 0,5% red ginger essential oil on the growth of Escherichia coli (p = 0,001). Post-hoc LSD analysis confirmed significant differences among all groups (p < 0>Escherichia coli, indicating its potential as a natural mouthwash alternative in dental practice.
Kata Kunci : Escherichia coli, asam asetat kedondong, kitosan, minyak atsiri jahe merah, zona hambat