Aktivitas
Antibakteri Ekstrak Rumput Laut Eucheuma cottoni
terhadap Bakteri Escherichia coli,
Staphylococcus aureus, Vibrio cholera dan Salmonella typhosa
Program Studi Ilmu Kelautan
FMIPA Universitas Sriwijaya, Inderalaya, Indonesia
Received 2 April 2013;
received
in revised form 5 Mei 2013;
accepted 8 Juni 2013
ABSTRACT
Seaweed (Eucheuma cottonii)
is one of the
marine biological resources that contain flavonoid compounds
as antibacterial agents. In a previous
study the antibacterial Eucheuma cottonii,
had been performed by dipping the disc paper into antibacterial extract, while in this study the antibacterial extract in
exact volume will be dropped onto the disc paper, so we will know the volume
certainty. The aims of the
study were to determine the antibacterial activity and the minimum inhibitory concentration of the
extract of Eucheuma cottonii test bacteria
by using methanol solvent. The study was conducted in September-October 2012.
In this study, seaweed extract made by using
maceration method
while the antibacterial activity testing
by using agar diffusion method. The study
results showed
that the extract of Eucheuma cottonii antibacterial activity inhibited the growth of Staphylococcus
aureus with inhibition zone diameter 17.33
mm, Escherichia coli with inhibition zone diameter 16,33 mm, Vibrio cholera with inhibition zone diameter 13,67 mm and Salmonella typhosa with inhibition zone diameter 11,67 mm. Minimum inhibitory concentration of Eucheuma cottonii to Escherichia coli,
Staphylococcus aureus and Vibrio cholera were
at 1% concentration while Salmonella typhosa was at 5 % concentration.
Keywords: Antibacterial, Eucheuma cottonii, Minimum Inhibitory Concentration.
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