The principal host species in which IMNV is known to cause significant disease outbreaks and mortalities is Penaeus vannamei. Outbreaks of IMN with sudden high mortalities may follow stressful events such as capture by cast-net, feeding, sudden changes in salinity or temperature, etc. This usually appears in early juvenile, juvenile, or adult P. So far, the disease has been reported in north-eastern Brazil where the expected carriers are and South-East Asia, including the island of Java. Due to a non-enveloped dsRNA virus structure, it is likely that IMNV will remain infectious in the gut and faeces of seabirds that have fed on dead or moribund shrimp at farms with ongoing IMN epizootics, and therefore the disease may be spread within and among farms by faeces or regurgitated shrimp carcasses. IMNV has also been demonstrated to be transmitted from shrimp to shrimp by cannibalism.

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Whiteleg shrimp, Litopenaeus vannamei, with clinical sign of muscle opaqueness with reddish colour at the distal abdominal segments were observed in farms located in West Bengal State, India. The IMNV infection was reproduced in healthy shrimp by intramuscular injection to satisfy River's postulates. The virus caused mortality in intramuscularly challenged shrimp, but failed to cause mortality by oral route. This site needs JavaScript to work properly.

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Abstract Whiteleg shrimp, Litopenaeus vannamei, with clinical sign of muscle opaqueness with reddish colour at the distal abdominal segments were observed in farms located in West Bengal State, India. Similar articles False rumours of disease outbreaks caused by infectious myonecrosis virus IMNV in the whiteleg shrimp in Asia. Senapin S, et al.

J Negat Results Biomed. A multi-season survey for infectious myonecrosis in farmed shrimp, Litopenaeus vannamei, in Pernambuco, Brazil. J Invertebr Pathol. Epub Mar 3. PMID: Loy JD, et al. J Gen Virol.

Epub Jan 4. Current status of viral diseases in Indian shrimp aquaculture. Tandel GM, et al. Acta Virol. PMID: Review. Historic emergence, impact and current status of shrimp pathogens in Asia. Flegel TW. Epub Mar Show more similar articles See all similar articles. MeSH terms Animals Actions.

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Infectious Myonecrosis

The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. Flegel TW,


infectious myonecrosis virus

The disease is currently diagnosed using a combination of gross signs primarily skeletal tail muscle necrosis with white opaque discoloration , histopathology, and in situ hybridization with a digoxigenin-labeled gene probe. A rapid and sensitive method for definitive diagnosis of the disease was developed using reverse-transcriptase polymerase chain reaction RT-PCR. Using RNA extracted from purified virions, the first step reaction detected copies of the IMNV viral genome whereas the nested step detected 10 copies. This site needs JavaScript to work properly.



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