The influence of the mangrove leaves infusion Excoecaria agallocha against Aeromonas hydrophila bacteria infection in tilapia

Dian Puspitasari

doi:10.29103/aa.v6i1.1064

Abstract

Tilapia is fish consumption with some excess, that is has a high protein, non-cholesterol, the taste is delicious, affordable and easily cultivated. One of the problems in cultivating them is a disease because it can cause the death of the fish. Disease-causing factors can be derived from the bacterium Aeromonas hydrophila. The bacteria A. hydrophila can cause the death of fish until 80%-100% within 1-2 week and even many that are already resistant to several types of commercial antibiotics, so that the need to look for a new antibiotics source. The source of these antibiotics can be derived from nature because it is cheaper, safer and environmentally friendly. Mangrove Excoecaria agallocha has been known to have potential as an antibacterial, larvacide, and antifungal. This can be used as a source of antibiotics. The purpose of this research is to analyze the potential of the mangrove leaves infusion E. agallocha in preventing the spread of disease in tilapia infected the bacteria and identify the compounds of secondary metabolite. This research was carried out from March-August 2018 and use approach posttest-only control group design (by comparing the treatment with the control group). The amount of treatment is five with three replicates. The dose used, namely 0%, 2.5%, 5%, 7.5% and 10%. The results showed that there was no difference in the influence of the mangrove leaves infusion E. agallocha against weight gain and survival rate of tilapia juveniles. The result of phytochemical screening indicates that E. agallocha leaves infusion contains tannins and flavonoids.

Highlights

Tilapia (Oreochromis niloticus) is one of the results of freshwater fish farming
The results showed the presence of bacterial resistance of A. hydrophila against some antibiotics such as amoxicillin, ampicillin, at lincomycin, novobiocin, oxacillin, penicillin, combinations with sulfamethoxazole, trimethoprim and rifampicin (Herawati et al, 2013)
Tilapia juveniles weight gain has decreased during the 14-day observation

Summary

Introduction

Excess which owned tilapia is tasty, solid flesh, not having many spines, obtained, and the price is relatively low. This fish is cultivated and able to live until the height of the 500 m above sea level (Ardita et al, 2015). One example of a disease-causing bacterium is Aeromonas hydrophila. These bacteria can cause mortality of fish 80%-100% with a period of 1-2 the week (Sari et al, 2012). Using antibiotics continuously can cause negative effects, such as the occurrence of bacterial resistance, and the price is high. The results showed the presence of bacterial resistance of A. hydrophila against some antibiotics such as amoxicillin, ampicillin, at lincomycin, novobiocin, oxacillin, penicillin, combinations with sulfamethoxazole, trimethoprim and rifampicin (Herawati et al, 2013)

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