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Natural co-infection with infectious hypodermal and hematopoietic necrosis virus (IHHNV) and infectious myonecrosis virus (IMNV) in Litopenaeus vannamei in Brazil

2011; Elsevier BV; Volume: 312; Issue: 1-4 Linguagem: Inglês

10.1016/j.aquaculture.2011.01.005

1873-5622

Maríllia Alves Teixeira-Lopes, Patrícia Raquel Nogueira Vieira-Girão, José Ednésio da Cruz Freire, Ítalo Régis Castelo Branco Rocha, Francisco Hiran Farias Costa, Gandhi Rádis‐Baptista,

Aquaculture Nutrition and Growth

Cultivation of whiteleg shrimp (Litopenaeus vannamei) constitutes a growing aquaculture industry in northeast Brazil. Similar to other animals that are intensively farmed, shrimp experience disease outbreaks, which are a constant threat and cause eventually significant economical losses. Infectious hypodermal and hematopoietic necrosis virus (IHHNV) and infectious myonecrosis virus (IMNV) are prevalent epizootic viral agents in Brazil. In a routine monitoring program for the diagnosis of IHHNV and IMNV, using molecular techniques like conventional PCR, reverse transcription coupled with PCR (RT-PCR) and absolute quantitative PCR (qPCR), we found that most positive samples of shrimp were simultaneously co-infected with both viruses. This survey is the first to show the occurrence of a natural co-infection that is caused by IHHNV and IMNV in penaeid shrimp attacked by viral disease that were cultivated in Northeast Brazil.