Epidemiological status of Taura syndrome and Infectious myonecrosis viruses in Penaeus vannamei reared in Pernambuco (Brazil)

• Published in: Aquaculture Vol. 262; no. 1; pp. 17 - 22
• Main Authors: Pinheiro, Ana C.A.S., Lima, Ana P.S., de Souza, Marília E., Neto, Edvaldo C.L., Adrião, Manoel, Gonçalves, Vítor S.P., Coimbra, Maria R.M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 14-02-2007; Elsevier Science; Elsevier Sequoia S.A
• Subjects: Animal aquaculture; Animal diseases; Animal productions; Aquaculture; Biological and medical sciences; disease detection; disease prevalence; dsRNA viruses; Epidemiological status; Epidemiology; Fundamental and applied biological sciences. Psychology; General aspects; IMNV; infectious myonecrosis virus; Litopenaeus vannamei; mariculture; Microbiology; Mortality; Penaeus vannamei; positive sense, single-stranded RNA viruses; reverse transcriptase polymerase chain reaction; RT-PCR; Shellfish; shrimp; shrimp culture; Taura syndrome virus; TSV; viral diseases of animals and humans; Virology; Viruses; Brazil; Brazil, Pernambuco; Penaeus vannamei; Epidemiological status; TSV; RT-PCR; IMNV; Status; Epidemiology; Syndrome; Pernambuco Brazil; Macrura; Crustacea; Polymerase chain reaction; Virus; Arthropoda; Decapoda; Invertebrata; Aquaculture
• ISSN: 0044-8486; 1873-5622
• DOI: 10.1016/j.aquaculture.2006.10.006

Several viral diseases of cultured
Penaeus vannamei, threaten the sustainability of shrimp farming industries worldwide. Taura syndrome virus (TSV) is considered one of the most harmful pathogens in the Americas, with cumulative mortalities reaching 40 to 95%. Another virus, named Infectious myonecrosis virus (IMNV), was first identified in
P. vannamei reared in Northern Brazil in 2004. In this study, we investigated the epidemiological status of TSV and IMNV in cultured shrimp by reverse transcriptase-polymerase chain reaction (RT-PCR) in Pernambuco state. Eleven commercial farms were randomly sampled between August and December of 2004, out of 14 existing farms in the state. Within each farm, ponds were randomly sampled and 10 shrimps were tested within each of them. A total of 505 individuals samples were RT-PCR tested. None was positive for TSV, suggesting that the virus was not present in the study population, which is consistent with the absence of clinical reports. Nine out of 11 farms were positive for IMNV, which should be considered alarming and strengthens the need for establishing monitoring programs at the national level. These results provide new insights into the epidemiological status of both diseases and may contribute to the development of a national biosecurity plan.