Mass Mortalities of Cultured Kuruma Shrimp, Penaeus japonicus, in Japan in 1993: Epizootiological Survey and Infection Trials.

Nakano, Heiji; Koube, Hiroshi; Umezawa, Statoshi; Momoyama, Kazuo; Hiraoka, Midori; Inouye, Kiyoshi; Oseko, Norihisa

doi:10.3147/jsfp.29.135

Cited by 183 publications

(96 citation statements)

References 2 publications

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“…WSSV is a double-stranded rod-shaped DNA virus and belongs to the family Nimaviridae [17]. This virus is well known for its high virulence and thereby bringing severe mortality within a short span of time [19,34]. IHHNV was discovered as early as 1981 when it was highly virulent to Penaeus stylirostris resulting in high mortality [14].…”

Section: Introductionmentioning

confidence: 99%

Association of dual viral infection with mortality of Pacific white shrimp (Litopenaeus vannamei) in culture ponds in India

et al. 2013

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Pacific white shrimp, Litopenaeus vannamei has been introduced recently for culture practice in India. Though SPF stocks are imported for larval production and thereafter culture practice, these are prone to infection with the existing viruses in the environment. Here we report mortality of L.vannamei in several farms in India with minimum biosecurity. The shrimp were harvested early within 50-72 days of culture due to the onset of disease and consequent mortality. As per the analysis carried out, the shrimp were infected with two virus, white spot syndrome virus (WSSV) and infectious hypodermal and hematopoietic necrosis virus (IHHNV). About 80 % of the samples collected had either or both of the viruses. A majority of these samples (60 %) had dual infection with WSSV and IHHNV. Infection of shrimp with WSSV and IHHNV could be detected both by PCR and histopathology. Some of the samples had either exclusively WSSV infection or IHHNV infection and were also harvested before the completion of the required culture period. All the samples analyzed were negative for taura syndrome virus, yellow head virus and infectious myonecrosis virus. While it is difficult to point out the exact etiological agent as the cause of mortality, strict biosecurity measures are advisable for the continuity of L. vannamei culture in India.

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Section: Introductionmentioning

confidence: 99%

Association of dual viral infection with mortality of Pacific white shrimp (Litopenaeus vannamei) in culture ponds in India

et al. 2013

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“…WSD outbreaks were first detected in Japan and China in 1993 (Nakano et al 1994, Zhan et al 1998 and in the following years quickly spread throughout Asia (Wongteerasupaya et al 1995, Anonymous 1997, Mohan et al 1998, Park et al 1998). …”

Section: Introductionmentioning

confidence: 99%

Relationship between white spot syndrome virus and indicators of quality in Penaeus monodon postlarvae in Karnataka, India

Corsin

Thakur²,

Padiyar³

et al. 2003

Dis. Aquat. Org.

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White spot disease (WSD) is a viral disease of shrimp caused by white spot syndrome virus (WSSV). Stocking WSSV-infected seed has been implicated as a major risk factor for outbreaks of WSD. In addition, the quality of postlarvae batches has been proposed as a predictor for good crops. This paper describes the relationship between indicators of quality and WSSV in postlarvae (PL) of Penaeus monodon from Karnataka, India, over the period September 1999 to January 2000. Three outcome variables were considered: the WSSV status of the PL, as determined by PCR, and 2 subjective assessments of PL quality, namely the activity of the PL and the quality of the PL as determined by research assistants and farmers, respectively. Of the 73 batches of PL, 49.3% from a random sample of farms tested positive for WSSV. After adjusting for confounding, stocking earlier in the growing season and duration of transportation were the main risk factors for the presence of WSSV. The quality assessed by farmers and the PL activity assessed by research assistants showed only fair agreement (kappa 0.252) reaffirming the subjective nature of such techniques. The only variables consistently associated with either assessment of quality in univariate analysis were PL length, number per bag and salinity of the water in the delivery bags. After adjusting for confounding, no single variable was consistently associated with PL quality and activity. The research assistants' assessment of PL activity was also associated with the hatchery and a brown-orange hepatopancreas in univariate analysis. After adjusting for confounding, a brown-orange hepatopancreas was still significant and fitted into the model together with the salinity of the water in the PL bags. The farmers' assessment of quality was associated with PL length, date of stocking and duration of transportation in both univariate and multivariable analyses. There was no relationship between quality assessment and WSSV in PCR-positive PL. KEY WORDS: White spot syndrome virus · Epidemiology · Risk-factors · Penaeus monodon · Postlarvae Resale or republication not permitted without written consent of the publisherDis Aquat Org 54: [97][98][99][100][101][102][103][104] 2003 lin treatment (Limsuwan 1997) and quality assessment tests (Chanratchakool et al. 1998). However, there is no published evidence for any association between the general quality of PL and either the presence of WSSV in the PL or productivity at harvest.In this paper, we evaluate quality assessment of PL with respect to the presence of WSSV, examine the risk factors associated with WSSV presence in PL, and identify factors associated with subjective measures of PL quality. The data were collected as part of a longitudinal epidemiological study of WSD in Karnataka, India. MATERIALS AND METHODSStudy design. As part of a longitudinal observational study conducted to identify the risk factors for WSD in Penaeus monodon farms in Kundapoor, Karnataka, India, a random sample of 100 shrimp ponds was selected. Of these po...

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“…BMNV lost its activity by irradiation at doses of more than 4.1 × 10 5 μW·sec/cm 2 . On the other hand, it was considered that WSSV, the pathogen of black tiger prawn in Malaysia, is almost the same as PRDV that causes PAV in Japanese kuruma prawn 4,8,10 . Nakano et al reported the viral inactivating effects of several disinfectants against PRDV using kuruma prawns 9 .…”

Section: Resultsmentioning

confidence: 99%

Examination for Viral Inactivation of WSSV (White Spot Syndrome Virus) Isolated in Malaysia Using Black Tiger Prawn (Penaeus monodon)

Oseko

Chuah²,

Maeno

et al. 2006

JARQ

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Mass Mortalities of Cultured Kuruma Shrimp, Penaeus japonicus, in Japan in 1993: Epizootiological Survey and Infection Trials.

Cited by 183 publications

References 2 publications

Association of dual viral infection with mortality of Pacific white shrimp (Litopenaeus vannamei) in culture ponds in India

Association of dual viral infection with mortality of Pacific white shrimp (Litopenaeus vannamei) in culture ponds in India

Relationship between white spot syndrome virus and indicators of quality in Penaeus monodon postlarvae in Karnataka, India

Examination for Viral Inactivation of WSSV (White Spot Syndrome Virus) Isolated in Malaysia Using Black Tiger Prawn (Penaeus monodon)

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