Journal Of Aquaculture And Fish Health
ISSN 2301-7309
Vol. 2 / No. 3 / Published : 2013-09
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Original Article :
Histopathological change in tilapia (oreochromis niloticus) fish spleen infected by edwardsiella tarda
Author :
- Evi Andrika *1
- Hari Suprapto *2
- Gunanti Mahasri *3
- Mahasiswa Fakultas Perairan dan Kelautan
- Dosen Fakultas Perairan dan Kelautan
- Dosen Fakultas Perairan dan Kelautan
Abstract :
Tilapia (Oreochromis niloticus) is a popular food fish communities and includes 10 commodities in the targeted increase in aquaculture production in 2014. However, in tilapia farming activities still having some problems. One such problem is the existence of bacterial disease. One of the bacteria that often attack tilapia is Edwardsiella tarda. Edwardsiella tarda is a cause of bacterial septicemia disease haemoragic or called edwardsielosis and gastroenteritis in freshwater fish and become opportunistic pathogens in humans and cause diarrhea. These bacteria can be found in the organ gills, kidney, liver, spleen and intestines. The spleen is an organ of the body's defenses are capable of phagocytosing the presence of foreign objects with the help of the reticuloendothelial system (RES) and the cells of the spleen are very responsive. So the spleen is important in the immune system of fish. If the organ is attacked by foreign objects such as bacteria, the immune system will be weak in the fish and the bacteria will spread to the whole body of fish that can cause fish to die. The purpose of this study was to determine the changes in spleen histopathology of tilapia (Oreochromis niloticus) were infected with the bacteria Edwardsiella tarda. The method used is descriptive method. Histopathological analysis of spleen damage data were analyzed descriptively by calculating the number of Melanomacrophage Centres (MMC) was observed to determine the density of MMC, Melanomacrophage cell hyperplasia observed in the MMC and congestion. The main study parameter is the entire change or damage to the spleen histopathology of tilapia infected with the bacteria Edwardsiella tarda. Research supporting parameters are water quality include temperature, pH and DO. Observations spleen histopathology of tilapia infected with the bacteria Edwardsiella tarda showed congestion, hyperplasia and increased number Melanomacrophage centers (MMC) in the spleen. Highest density MMC on day 7 post-infection which is equal to 38. Highest density MMC while the control group only at 10 on day 7. The average density was highest among MMC infection on day 7 which is equal to 28. While the average highest density MMC in the control group was 8.5 on day 7. This proves that the spleen tissue damage increases exponentially with time Edwardsiella tarda infection. Need to do further research on the changes in the number and shape of blood cells due to Edwardsiella tarda infection.
Keyword :
Nile, Edwardsiella tarda, spleen, histopathology,
References :
B.T.W. Wiryanta,(2010) Budi Daya dan Bisnis Ikan Nila Jakarta : PT Agromedia Pustaka
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