Dear Colleagues,
This is the summary of my latest publication on Jurnal Harpodon (launched by Universitas Borneo Tarakan) Vol. V, April 2012 :
Bacterial deseases are seriousness
problem in aquaculture. The uncontrolled of quality degradation of pond sites
because of wastes and organic matters decompotition and also global climate
changes has been predicted affect triggered the bacterial infections. Vibrio harveyi is one of patogenic
bacteria which againts Tiger shrimp (Penaeus
monodon). The recovery strategies has been applied both in the
rehabilitation of pond sanitary and also it has been focussed in curative
methods to overcome infection activities. The usage of synthetic antibiotics
has been reported gift any negative effects, either for environment and rised
pathogenic resintance because of uncontrolled exposure.
Environmental friendly and based on
biological methods has been promoted to overcome this problem. The usage of
antibacterial agents derived from natural compounds has been recommended as an effective method.
Several marine resources has been predicted as candidates of antibacterial
agents againts Vibrio harveyi.
Several seaweeds (macroalga) and seagrass has been explored in this research at
in-vitro level of study to inhibit
the activity of Vibrio harveyi. The
result showed that all of the crude extracts derived from seagrass (Thallasia sp) and several kinds of
seaweeds (Padina sp, Gracilaria sp
and Sargassum sp) could inhibit the
growth of Vibrio harveyi from the
lowest concentration level (10 µg/mL). The highest inhibition activity has been
showed from the antibacterial sensitivity test of crude extract of Thallasia sp at the concentration level
of 10.000 µg/mL.
Keywords : macroalgae, seagrass, secondary
metabolite, antibacteria, Vibrio harveyi
