Penapisan Aktivitas Antibakteri dari Bakteri yang Berasosiasi dengan Karang Lunak Sarcophyton sp

Chairul Huda, Salni ., Melki .

Abstract


A screening of antibacterial activity from bacteria associating with soft coral Sarcophyton sp from Tegal island, Lampung, was conducted. The purpose of this screening was to get bacterial isolates that have antibacterial activity with Escherichia coli and Stapiloccocus aureus and also to determine the biochemical characters from the bacteria that have the antibacterial activity. The sample of soft coral was taken by snorkeling at 1,5 meters depth. The bacteria that associated with soft coral were isolated by dilution and pour plate method on NA media. The test of antibacterial activity was done by using agar diffusion  method with paper discs. Isolates that have antibacterial activity were tested to check their biochemical characters. From 10 bacteria isolates that have associated with soft coral Sarcophyton sp were obtained, there were two isolates had antibacterial activity (D1.1 to E. coli and D2.2 to S. Aureus).  Both bacteria isolates were  gram negative and motil. In catalyst test, oxidation, urea, citrate, and carbohydrate fermentation both bacteria isolates showed positive reaction. With VP test, D1.1 isolate showed positive  reaction but D2.2 showed negative reaction. In contarary, with gelatin isolate test, isolate D1.1 showed negative reaction but D2.2 positive.


Keywords: Bacteria associations, soft corals, Sarcophyton sp, antibacterial,  biochemical tests

 

ABSTRAK

Telah dilakukan penapisan aktivitas antibakteri dari bakteri yang berasosiasi dengan karang lunak Sarcophyton sp dari perairan Pulau Tegal, Lampung. Tujuan penelitian ini adalah untuk mendapatkan isolat bakteri yang memiliki aktivitas antibakteri terhadap E. coli dan S. aureus serta mengetahui sifat biokimia dari bakteri yang memiliki aktivitas antibakteri tersebut. Pengambilan sampel karang lunak dilakukan dengan teknik snorkeling pada kedalaman 1,5 meter. Bakteri yang berasosiasi dengan karang lunak diisolasi dengan metode pengenceran bertingkat dan pour plate pada media NA. Uji aktivitas antibakteri dilakukan dengan metode difusi agar menggunakan paper disk. Isolat yang memiliki aktivitas antibakteri diuji sifat biokimianya. Berdasarkan hasil penelitian didapatkan 10 isolat bakteri yang berasosiasi dengan karang lunak Sarcophyton sp, dan dari 10 isolat tersebut didapat 2 isolat yang memiliki aktivitas antibakteri (D1.1 terhadap E. coli dan D2.2 terhadap S. aureus). Kedua isolat bakteri ini merupakan bakteri gram negatif dan motil. Pada uji katalase, oksidase, urea, sitrat dan fermentasi karbohidrat, kedua isolat bakteri baik D1.1 maupun D2.2 sama-sama menunjukan reaksi yang positif. Uji MR kedua isolat sama-sama menunjukan reaksi negatif. Sedangkan pada uji VP isolat bakteri D1.1 menunjukkan reaksi positif dan D2.2 negatif. Sebaliknya, pada uji gelatin isolat D1.1 menunjukkan reaksi negatif dan D2.2 positif.

Kata Kunci: Bakteri asosiasi, karang lunak, Sarcophyton sp, antibakteri, uji  biokimia


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DOI: https://doi.org/10.56064/maspari.v4i1.1343

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