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Angela Mariana Lusiastuti

Research Institute for Freshwater Aquaculture, Bogor

Author-ID : 3672361

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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THE EFFECTS OF STORAGE TEMPERATURE AND TYPES OF MEDIA ON THE SURVIVAL RATE OF S. agalactiae BACTERIOPHAGE Angela Mariana Lusiastuti; Tuti Sumiati; Adin Priadi
Indonesian Aquaculture Journal Vol 3, No 2 (2008): (December 2008)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

The successful effect of phages in phage therapy has been proven by an increase of the presence of phages in survivors. Seven previously isolated phages were used to examine the effects of storage temperature and types of media on their survival rate. Phages PSaT-18, PSaT-19, PSaT-20 and PSaT-21 isolated from a Streptococcosis-infected Tilapia (Oreochromis niloticus) were used in this study. Phages PSaG-1, PSaG-2 and PSaG-3 were isolated from a diseased Gouramy (Osphronemus gouramy). All of the phages were stored in refrigerator at temperature of 8oC and kept in two types of media, Brain Heart Infusion Broth (BHIB) and BHIB enriched with glycerol. To determine the lytic activity of the phages, 20 μL of each phage suspension was poured onto BHIA plate and incubated at 25oC for 24 to 48 hours. The result showed that phages PSaT-18, PSaT-19, PSaT-20 and PSaT-21 have lytic activity against S. agalactiae and S. iniae than phages PSaG-1, PSaG-2, and PSaG-3. Phages PSaT-18, PSaT-19, PSaT-20, and PSaT-21 always survived up to three weeks and phage PSaT-18 in BHIB have the highest potential as a candidate of phage therapy for Streptococcosis.

IMPROVEMENT OF NON SPECIFIC IMMUNE SYSTEM ON COMMON CARP (Cyprinus carpio) AGAINST KOI HERPESVIRUS DISEASE (KHVD) BY ADDITION OF ASCORBIC ACID ON FISH DIET: A FIELD SCALE STUDY Taukhid Taukhid; Desy Sugiani; Angela Mariana Lusiastuti
Indonesian Aquaculture Journal Vol 5, No 1 (2010): (June 2010)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

The research with the aim to know the optimal feeding frequency of supplemented ascorbic acid (microencapsulated vitamin C CFC-90) on the dose of 750 mg/kg feed to control Koi Herpesvirus (KHV) disease infecting common carp has been done in field condition. Fish were reared in floating cages with the size of 3.5 m x 3.5 m x 2.0 m and stocking density of 1,250 fish/cage with the size range of ± 10 g/fish. The treatments applied in the research were: (A) daily application, (B) every 3 days application, and (C) without vitamin C addition as the control. Fish test were challenged to KHV infection on the mid cultivation by cohabitation method in the laboratory scale for 2 weeks. Examination on behavior, clinical sign, and mortality of fish test conducted daily. The results showed that the highest survival rate was found on the application of vitamin C every 3 days (60.16%); and followed by every day (52.00%), and the lowest was found on the control group (47.36%).

TUMOUR CASE IN KOI CARP (Cyprinus carpio) Lili Sholichah; Angela Mariana Lusiastuti; Domenico Caruso; I Wayan Subamia; Uni Purwaningsih
Indonesian Aquaculture Journal Vol 5, No 2 (2010): (December 2010)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

A case study of tumour in koi carp (Cyprinus carpio) was observed in rearing periode. This tumour occurs solitary, large, pale red, fleshy masses under the lips and dental plates on the outside, and by reason of its size, may prevent closure the mouth. Moreover, this tumour goes through into the inside of the mouth. At necropsy, there were two soft, firm, small mass at inside of the mouth and the bigger mass at outside the mouth. Samples of this tumour were fixed in 10% formalin were used for histology analysis. The clinical course of the tumour is one of relatively slow but progressive growth. The proliferative stage of the neoplastic process is preceded and accompanied by a striking vascular reaction. Intensed hyperemia invariably occurs in that region of the mucosal surface which later becomes the site of neoplastic proliferation. Neoplastic cells lied around lamina propria and submucosal. These cells were joined together to make vacuolization and the other cells become pleiomorphism with hyperchromatic nucleus and N/C ratio cells are 1:1. In some area, there were many empty holes, around the holes there were debris cells, inflammation cells, and erythrocytes.

Streptococcus agalactiae INFECTION ON TILAPIA (Oreochromis niloticus) IN CIRATA RESERVOIR, WEST JAVA Angela Mariana Lusiastuti; Lila Gardenia; Tatik Mufidah; Yani Aryati
Indonesian Aquaculture Journal Vol 4, No 1 (2009): (June 2009)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Streptococcosis is one of bacterial diseases in the culture of Tilapia, Oreochromis niloticus and has caused significant economic losses. Streptococcus iniae, is known as pathogen to marine and freshwater fishes whereas Streptococcus agalactiae is known as pathogen to Tilapia. The isolation and characterization of four isolates of S. agalactiae, were described from an infected Tilapia from Cirata Reservoir, West Java, in July 2008. Conventional and rapid identification systems were used to determine isolates of S. agalactiae from brain and kidney tissues. In this paper, we have characterized S. agalactiae and this was the first isolation of this bacteria from fish. The isolates were gram positive, catalase-negative, oxidase-negative,  haemolytic cocci colonies on blood agar. All of the of isolates were biochemically characterized with the API 20 Strep System (bioMerieux). Bacterial chromosomal DNA used in PCR assay was extracted by heating method. The forward primer is Sdi 61: 5’-AGGAAACCTGCCATTTGCG-3’ and the reverse primer is Sdi 252: 5’-CAATCTATTTCTAGATCGTGG-3’ with gene target 16S intergenic spacer and it has 192 bp in length. These primers were designed by Alpha DNA (Montreal, Quebec). The biochemical patterns of four isolates were rather different although almost all traits were similar with the exception of pyroglutamic acid (pyra) and L-arginin (ADH), for which we observed negative and positive reaction in this study. Therefore, some of the biochemical characteristics of the four isolates did not fit 100% with the typical patterns of S. agalactiae. However, the PCR result showed that this PCR assay is an effective tool for rapid and specific detection of S. agalactiae, the main pathogens involved in warm-water streptococcosis, obtained from pure culture of naturally infected fish. Therefore, it could be a useful alternative for culture-based routine diagnosis of warm-water streptococcal infections in fish.

Co-Authors Adin Priadi Desy Sugiani Domenico Caruso I Wayan Subamia Lila Gardenia Lili Sholichah Tatik Mufidah Taukhid Taukhid Tuti Sumiati Uni Purwaningsih Yani Aryati

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