Mass Mortalities in the Production of Juvenile Greasyback Shrimp, Metapenaeus ensis, Caused by Penaeid Acute Viremia(PAV).

Momoyama, Kazuo; Hiraoka, Midori; Inouye, Kiyoshi; Kondo, Takahisa; Nakano, Heiji; Yasui, Minoru

doi:10.3147/jsfp.32.51

Cited by 14 publications

(8 citation statements)

References 10 publications

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“…The tissues of ecto-mesodermal origin, i.e., the cuticular epithelia, gills, lymphoid organ, hematopoietic tissue, myocardium, hemocytes and various connective tissues have been reported as targets of the virus. Viral propagation within the nucleus leads to nucleus enlargement and is recognized as pathognomonic indicating the viral infection Momoyama et al, 1994;Takahashi et al, 1994;Momoyama et al, 1995;Lo et al, 1997;Momoyama et al, 1997;Lightner et al 1998;Momoyama et al, 1999;Rajendran et al, 1999;Wang et al, 1999;Pantoja and Lightner, 2003;Rodriguez et al, 2003;Yoganandhan et al, 2003). Despite these many histopathological studies of PAV and WSD, we determined the histopathological features in the previous reports showed little tissue damages and not severe enough to cause mortality.…”

Section: Necrosis Penaeus Japonicusmentioning

confidence: 88%

Electron Microscopy on the Heart of Kuruma Prawn Penaeus japonicus Artificially Infected with Penaeid Rod-shaped DNA Virus

Miyazaki¹,

Yamaguchi²,

Yasumoto³

et al. 2008

Fish Pathol.

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-Penaeid acute viremia (PAV) or white spot disease (WSD) causes mass mortality in cultured penaeid shrimp. Despite many histopathological studies, the principal lesion in the diseased shrimp remained unclear. Here we reevaluated the histopathology and ultrastructure of moribund kuruma prawn Penaeus japonicus artificially infected with penaeid rod-shaped DNA virus (PRDV) as a pathogen of PAV. We showed that PRDV infected cardiac satellite cells, primary myocardial cells and myocardial cells of the heart, where the nuclei of these cells displayed virus propagation that resulted in severe myocardial necrosis. Myocardial necrosis was suggested to be a primary cause of the viremia of PAV.

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Section: Necrosis Penaeus Japonicusmentioning

confidence: 88%

Electron Microscopy on the Heart of Kuruma Prawn Penaeus japonicus Artificially Infected with Penaeid Rod-shaped DNA Virus

Miyazaki¹,

Yamaguchi²,

Yasumoto³

et al. 2008

Fish Pathol.

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“…However, extremely severe hypoxia presumably affects survival, and thus the number of cohorts. Detailed research is required on the relationship between survival-growth of M. ensis and hypoxia and other environmental factors, such as temperature (Abe et al 1995, Park & Loneragan 1999, diet, predation (Primavera 1997) and disease (Momoyama et al 1997). …”

Section: Sakuramoto 2013)mentioning

confidence: 99%

Growth, reproduction and ontogenetic migration of the greasyback shrimp <i>Metapenaeus ensis</i> in Osaka Bay, Japan

Ariyama

Sano

2015

Plankton Benthos Res

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Abstract:To clarify the growth, reproduction and ontogenetic migration of Metapenaeus ensis, 96,898 individuals (6-175 mm in body length, BL) were collected from five areas in Osaka Bay. Larval settlement was estimated to occur from June or July to October in the Yodo River mouth. Juveniles grew there and migrated to the innermost area of the bay, and then to the deeper areas as they grew. Growth of females showed a good approximation to a seasonally fluctuating von Bertalanffy equation, with a size-frequency distribution suggesting the presence of 2 or 3 cohorts per year. Body length of females attained 35-125 mm in the first winter and 105-150 mm in the second, and their life span is estimated to be about two years. Their reproductive season was mainly from June or July to September in the second year (ca. 1 year old), and mainly July in the third year (ca. 2 years old). The broad variation in the size range of reproducible females (BL 76-168 mm) suggests indeterminate growth. Males were smaller than females with overlapping cohorts but their life cycle appears to be similar to that of females.

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“…Penaeid acute viremia (PAV) causes serious problems for kuruma shrimp farmers Takahashi et al, 1994Takahashi et al, , 1996 and was also reported in the seedling production of greasyback shrimp (Metapenaeus ensis) in Japan (Momoyama et al, 1997). The caus ative agent of PAV is the penaeid rod-shaped DNA virus (PRDV, formerly named RV-PJ).…”

Section: Introductionmentioning

confidence: 99%

Bacterial and Viral Diseases of Kuruma Shrimp (Penaeus japonicus) in Japan.

et al. 1998

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Three major disease problems that have been reported in kuruma shrimp (Penaeus japonicus) culture in Japan are vibriosis, penaeid acute viremia (PAV) and baculoviral mid-gut gland necrosis (BMN).Vibriosis in kuruma shrimp was first reported in 1985, and since then it has seriously damaged the culture of this species in Japan. The characteristic signs of this disease are brown spots in the lymphoid organs and in the gills, and cloudiness of muscle in the sixth abdominal segment. This bacterium was identified as a new species in the genus Vibrio and named Vibrio penaeicida.Outbreaks of PAV, causing serious mortality of kuruma shrimp and being closely related to white spot baculovirus infection of penaeid shrimp, have been reported in Japan since 1993. Diseased shrimp show white spots in the carapace and reddish discoloration of the body. A non-occluded bacilliform virus, penaeid rod-shaped DNA virus (PRDV), was observed under the transmission electron microscope. In order to detect the virus, primers for the polymerase chain reaction (PCR) were developed. PCR has been successfully used for diagnosis and detection of carrier state crustaceans.BMN is the epizootic of kuruma shrimp larvae in Japan. The typical sign of this disease is a white-turbid mid-gut gland that shows remarkable cellular necrosis and no inclusion body in the section. Rod-shaped particles, resembling baculovirus, are found in the affected nuclei under the electron microscope.Attempts were made to evaluate the efficacy of immunostimulants to kuruma shrimp as potential agents for the prophylaxis of vibriosis and PAV. The oral administration of a peptidoglycan derived from Bifidobacterium thermophilum is effective in preventing these diseases in kuruma shrimp.

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Mass Mortalities in the Production of Juvenile Greasyback Shrimp, Metapenaeus ensis, Caused by Penaeid Acute Viremia(PAV).

Cited by 14 publications

References 10 publications

Electron Microscopy on the Heart of Kuruma Prawn Penaeus japonicus Artificially Infected with Penaeid Rod-shaped DNA Virus

Electron Microscopy on the Heart of Kuruma Prawn Penaeus japonicus Artificially Infected with Penaeid Rod-shaped DNA Virus

Growth, reproduction and ontogenetic migration of the greasyback shrimp <i>Metapenaeus ensis</i> in Osaka Bay, Japan

Bacterial and Viral Diseases of Kuruma Shrimp (Penaeus japonicus) in Japan.

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