Antibacterial property of crude extract from stem-bark and leaves of Rhizophora apiculata against selected bacterial fish pathogens
ecently the wide range of commercial antibiotics in fish feed for aquaculture practices has led to antibacterial resistance, environmental pollution and residue build-up in fish tissue. Therefore new sources of antibiotics from natural sources need to be investigated to circumvent these problems....
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
International Islamic University Malaysia
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/54494/ http://irep.iium.edu.my/54494/ http://irep.iium.edu.my/54494/7/54494-edited.pdf |
| Summary: | ecently the wide range of commercial antibiotics in fish feed for
aquaculture practices has led to antibacterial resistance, environmental pollution and
residue build-up in fish tissue. Therefore new sources of antibiotics from natural sources
need to be investigated to circumvent these problems. Rhizophora apiculata has been
reported to have high antimicrobial activity due to the high concentration of tannin in the
bark of the tree. Methods: Based on these contexts, this study was conducted to measure
the antimicrobial activity of ethanol, ethyl acetate and distill water extracts from the
stem-bark and the leaves of R. apiculata. 9 species of bacteria consist of B. subtilis,
S. aureus, S. epidermidis, P.aeruginosa, P. mirabilis, H. alvei, V. alginolyticus, V.
paraheamolyticus and E. coli were tested to measure their susceptibility to the extracts.
The extracts were dissolved into 2 different concentrations which were 10 mg/mL and 50
mg/mL or 10 ug/disc and 50 ug/disc respectably, to determine the inhibitory effect of the
extract upon the bacterial fish pathogen. Results: 2 species of Gram-positive bacteria
which were B. subtilis and S. epidermidis have shown positive results with 9.0 mm to 16.0
mm of inhibition zone respectably while the other bacteria were resistant to the extract
concentration administered. Conclusions: A continuous monitoring need to be carried out
to comprehend the potential of Rhizophora apiculataas and other mangrove plants, which
can be applied as an alternative source for environmental friendly antibacterial drug in
pharmaceutical and aquaculture industries |
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