The influence of temperature and β-1,3-glucans on the occurrence of white spot syndrome virus and white spot disease in post-larvae of Penaeus vannamei shrimp.

Penaeus vannamei is the main species of shrimp farmed worldwide, and for Ecuador it is the first non-oil economic sector. However, various pathogens, including white spot syndrome virus (WSSV), threaten the sustainability of shrimp farming. P.

Bacterial communities and signatures in the stomach and intestine of juvenile () shrimp affected by acute hepatopancreatic necrosis disease.

Acute hepatopancreatic necrosis (AHPND) is a severe bacterial disease affecting farmed shrimp. Although various pathogenic bacteria associated with AHPND-affected shrimp have been described, little is known about the bacterial signatures in the stomachs and intestines when the disease occurs naturally. In this study, we characterized the microbiome of by high-throughput sequencing (HTS).

Draft genome sequence of strain 3TSA-3, a potential probiotic for Pacific white shrimp postlarvae isolated from commercial hatchery tanks.

We report the draft genome of strain 3TSA-3, isolated from Pacific white shrimp postlarvae collected from a hatchery tank with high survival despite the presence of pathogenic . The strain possesses genes encoding bacteriocins and lacks virulence factor genes, characteristics for a potential aquaculture probiotic.

Microbial signature profiles of larvae in low-survival hatchery tanks affected by vibriosis.

Vibriosis is caused by some pathogenic and produces significant mortality in Pacific white shrimp larvae in commercial hatcheries. Acute hepatopancreatic necrosis disease (AHPND) is an emerging vibriosis affecting shrimp-producing countries worldwide. Zoea 2 syndrome is another type of vibriosis that affects the early stages of larvae.

Genomic and Evolutionary Features of Nine AHPND Positive Vibrio parahaemolyticus Strains Isolated from South American Shrimp Farms.

Vibrio parahaemolyticus is a bacterial pathogen that becomes lethal to shrimps when acquiring the pVA1-type plasmid carrying the PirAB genes, causing acute hepatopancreatic necrosis disease (AHPND). This disease causes significant losses across the world, with outbreaks reported in Southeast Asia, Mexico, and South America. Virulence level and mortality differences have been reported in isolates from different locations, and whether this phenomenon is caused by plasmid-related elements or genomic-related elements from the bacteria remains unclear.

Complete Coding Genome Sequence of Infectious Hypodermal and Hematopoietic Necrosis Virus Isolated from () Shrimp in Ecuador.

Infectious hypodermal and hematopoietic necrosis virus (IHHNV), recognized as Penaeus stylirostris penstyldensovirus 1 (PstDV1), has been associated with the runt-deformity syndrome (RDS) in cultured Penaeus (Litopenaeus) vannamei and Penaeus monodon shrimp. Here, we report the second published genome sequence of IHHNV, which was isolated from P. vannamei shrimp cultured in Ecuador.

Microbial community characterization of shrimp survivors to AHPND challenge test treated with an effective shrimp probiotic (Vibrio diabolicus).

Background: Acute hepatopancreatic necrosis disease (AHPND) is an important shrimp bacterial disease caused by some Vibrio species. The severity of the impact of this disease on aquaculture worldwide has made it necessary to develop alternatives to prophylactic antibiotics use, such as the application of probiotics. To assess the potential to use probiotics in order to limit the detrimental effects of AHNPD, we evaluated the effect of the ILI strain, a Vibrio sp.

An effective white spot syndrome virus challenge test for cultured shrimp using different biomass of the infected papilla.

White spot syndrome virus (WSSV) is one of the most virulent pathogens of cultured penaeid shrimp. Several control strategies are used commonly to mitigate the economic losses caused by the pathogen, such as application of antiviral products at farm level. One of the most practical method for the screening of potential anti-WSSV products is through challenge tests.

PirVP genes causing AHPND identified in a new Vibrio species (Vibrio punensis) within the commensal Orientalis clade.

Acute hepatopancreatic necrosis disease (AHPND) has extended rapidly, causing alarming shrimp mortalities. Initially, the only known causative agent was Vibrio parahaemolyticus carrying a plasmid coding for the mortal toxins Pir. Recently, it has been found that the plasmid and hence the disease, could be transferred among members of the Harveyi clade.

Draft Genome Sequence of a White Spot Syndrome Virus Isolate Obtained in Ecuador.

White spot syndrome virus (WSSV) is the most devastating viral disease affecting cultivated shrimp around the world. Currently, there is no reported genetic information on WSSV affecting in Ecuador. Therefore, we determined the genome of a WSSV isolate from shrimp and compared it with the genomes of isolates from other geographical locations.

Draft genome sequence of pathogenic bacteria Vibrio parahaemolyticus strain Ba94C2, associated with acute hepatopancreatic necrosis disease isolate from South America.

Vibrio parahaemolyticus is a pathogenic bacteria which has been associated to the early mortality syndrome (EMS) also known as hepatopancreatic necrosis disease (AHPND) causing high mortality in shrimp farms. Pathogenic strains contain two homologous genes related to insecticidal toxin genes, PirA and PirB, these toxin genes are located on a plasmid contained within the bacteria. Genomic sequences have allowed the finding of two strains with a divergent structure related to the geographic region from where they were found.