Skrining Antibakteri dan Identifikasi Molekular Bakteri Asam Laktat dari Fermentasi Buah Kakao Merah (Theobroma cacao L. Varietas Criollo) Terhadap Bakteri Shigella dysenteriae
Fitri Yuniarti, Wahyu Hidayati, F. Fitriani, Audina Sarah
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引用次数: 0
Abstract
AbstrakKakao merupakan salah satu komoditas perkebunan Indonesia yang berperan sebagai habitat tumbuh dan berkembangnya mikroorganisme yang baik. Salah satu bakteri yang dapat tumbuh dikomoditas tersebut yakni Bakteri Asam Laktat (BAL) yang berguna untuk kesehatan pencernaan. Penelitian ini bertujuan untuk mendapatkan isolat BAL yang memiliki aktivitas antibakteri tinggi terhadap Shigella dysenteriae dari fermentasi buah kakao merah (Theobroma cacao L. varietas criollo). Skrining antibakteri terhadap S. dysenteriae dilakukan dengan metode difusi cakram dan BAL yang memiliki aktivitas antibakteri tertinggi selanjutnya dilakukan identifikasi molekular dengan teknik Polymerase Chain Reaction (PCR). Sepasang primer 27F dan 1492R digunakan untuk amplifikasi gen 16S rRNA BAL dan dilanjutkan dengan sekuensing. Identifikasi hasil sekuensing dilakukan dengan penyejajaran data pada program BLAST. Hasil Penelitian menemukan isolat KAT372 merupakan isolat yang memiliki aktivitas antibakteri tertinggi dari 6 isolat yang ditemukan pada fermentasi buah kakao merah. Isolat ini memiliki kemiripan 99% terhadap Lactobacillus fabifermentans strain DSM 21115. Isolat BAL dari fermentasi buah kakao merah dapat dimanfaatkan sebagai sumber antibakteri alami terhadap S. dysenteriae.AbstractCacao is one of Indonesia's plantation commodities and is a natural resource that has an important role as a habitat for the growth and development of various good microorganisms. One of them is Lactic Acid Bacteria (LAB), which is good bacteria for digestive health. This study aims to obtain LAB isolates that have high antibacterial activity against Shigella dysenteriae from fermented red cacao fruit (Theobroma cacao L. criollo variety). Antibacterial screening against Shigella dysenteriae was carried out using the disc diffusion method and LAB which had the highest antibacterial activity followed by molecular identification with the Polymerase Chain Reaction (PCR) technique. A pair of 27F and 1492R primers were used for amplification of the 16S rRNA BAL gene and continued with sequencing. The identification of sequencing results was carried out by aligning the data in the BLAST program. The results found that KAT372 isolate was the isolate that had the highest antibacterial activity of the 6 isolates found in the fermentation of red cacao fruit. This isolate has 99% similarity to Lactobacillus fabifermentans strain DSM 21115. LAB isolate from fermented red cacao fruit can be used as a source of natural antibacterial against S. dysenteriae in maintaining digestive health later.