Isti Koesharyani
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SURVEILLANCE OF WHITE SPOT SYNDROME VIRUS (WSSV) AND MYONECROSIS VIRUS (IMNV) INFECTIONS IN CULTURED Litopenaeus vannamei Isti Koesharyani; Ariani Andayani; Ulfah Fayumi; Ketut Sugama
Indonesian Aquaculture Journal Vol 14, No 1 (2019): (June, 2019)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/iaj.14.1.2019.39-45

Abstract

Disease surveillance programs will provide updated information on the distribution of diseases which allows proper development of mitigation and prevention strategies. WSSV and IMNV viruses are the most threatening diseases in shrimp and have affected the global shrimp farming industries. The present study was conducted to investigate the prevalence of WSSV and IMNV in three different locations of shrimp farms of South Sulawesi, West Nusa Tenggara and West Jawa. Samples of shrimp Litopenaeus vannamei were randomly collected from 20 active shrimp farms in the locations and five samples of postlarvae (PL) that were stocked in ponds. Tissue samples of the shrimp and whole body of PL were preserved in ethanol 90% for analysis. Determination of WSSV and IMNV were carried out by the mobile IQTM WSSV and IQTM IMNV Kit POCKIT Systems. The results showed that the prevalence of WSSV was 30% (6/20) and IMNV was 20% (4/20), while on PL was 40% (2/5). The result revealed that the South Sulawesi (Takalar) samples were positive only for WSSV while West Java (Panimbang) samples were positive only for IMNV. A follow-up study predicted that both viruses were transmitted from the PLs. The present study clearly confirmed that viruses were transmitted from PLs that were not free from either WSSV or IMNV. Therefore, a biosurveillance program is strongly recommended to be implemented in order to avoid the spread of the viral disease to other locations within Indonesia.
APLIKASI KUANTIFIKASI KOI HERPESVIRUS : REAL TIME – QUANTITATIVE POLYMERASE CHAIN REACTION (RT-Q PCR) MENGGUNAKAN SYBR GREEN PADA IKAN MAS (Cyprinus carpio) Isti Koesharyani; Lila Gardenia; Tatik Mufidah; Ayi Santka
Media Akuakultur Vol 12, No 1 (2017): (Juni, 2017)
Publisher : Pusat Riset Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (582.798 KB) | DOI: 10.15578/ma.12.1.2017.45-53

Abstract

Koi Herpes Virus (KHV) di Indonesia sejak tahun 2002 merupakan penyakit mematikan yang menyerang ikan koi Cyprinus carpio koi dan ikan mas Cyprinus carpio carpio, dan sampai saat ini, infeksi KHV dilaporkan sudah menyebar hampir di seluruh dunia. Untuk mengetahui adanya infeksi KHV perlu cara diagnosa yang sangat akurat/sensitif, sehingga keberadaan KHV dapat diketahui secara pasti dengan tingkat sensitivitas yang lebih baik pada ikan budidaya. Tujuan dari penelitian ini adalah untuk mengaplikasikan teknik deteksi dengan real time quantitative polymerase chain reaction (RT- qPCR/qPCR) guna mengetahui adanya infeksi KHV secara kuantitatif pada ikan mas dengan mengetahui kandungan virus (viral load). Sebanyak masing-masing 3 ekor sampel diperoleh dari sentra budidaya ikan mas di Cirata-Jawa Barat, Maninjau-Sumatera Barat, dan Banjarmasin-Kalimantan Selatan. Sampel-sampel tersebut selanjutnya dianalisa keberadaan KHV-nya dengan RT-qPCR menggunakan SYBR Green. Hasil pengujian menunjukkan bahwa jumlah tertinggi (viral load) diperoleh dari ikan mas asal Cirata-3 dengan nilai Threshold Cycle (Ct.) 18,24 atau setara dengan 3,4 x 107 kopi, dan terendah dari ikan mas asal Banjarmasin-3 dengan nilai Ct. 33,39 atau 1,8 x 102 kopi. Dua standar yang digunakan dalam pengujian ini berupa plasmid dengan jumlah kopi 2 x 104 (Ct 27,24) dan 2 x 103 (Ct 30,24) dan kontrol atau Non Template Control (NTC) adalah 3,1 x 10 atau dengan nilai Ct 35,65. Uji aplikasi deteksi KHV dengan metode RT-qPCR ini memberikan hasil yang lebih sensitif, di mana sampel yang tidak terdeteksi dengan metode PCR konvensional dapat dideteksi dan dihitung jumlah kopi DNA (DNA copy). Since 2002, Koi herpesvirus (KHV) in Indonesian has been a malignant diseases, now recognized as a worldwide cause of mortality among populations of koi Cyprinus carpio koi and common carp Cyprinus carpio carpio. To determine the presence of infection is required the KHV diagnosis method with highly accurate and sensitive, so that the existence KHV can be known exactly with high sensitivity level in fish farming.The objective of this study was to develop and evaluate the infection by Real Time Quantitative Polymerase Chain Reaction (RT- qPCR/qPCR). Sample were taken from Carp culture in West Java, West Sumatra, and South Kalimantan. The assay was done by SYBR Green RT-qPCR. The analysis result of KHV in carp revealed that the carp from Cirata-3 had the highest viral load with Ct. value 18.24 equal with 3.4 x 107 copies, and the lowest one was the carp from Banjarmasin-3 at Ct. value 33.39 (1.8 x 102 copies), while two standards plasmid and Non Template Control (NTC) had Ct value of 27.24 (2 x 104copies),30.24 (2 x 103copies), and 35.65 (3.1 x 10 copies), respectively. Application KHV test by q-PCR has more advantages and sensitive than that of conventional PCR, and it can be used to detect and calculate the copy number of DNA.