In this study, we explored the pathogenic effects of white spot syndrome virus (WSSV) and effects of yeast cell wall in the red claw crayfish, Cherax quadricarinatus, by investigating the activity of enzymes related to innate immune function following artificial infection of immunized and non-immunized crayfish. Our results reveal that the activity of four enzymes, phenoloxidase (PO), peroxidas...

In this study, we explored the pathogenic effects of white spot syndrome virus (WSSV) and effects of yeast cell wall in the red claw crayfish, Cherax quadricarinatus, by investigating the activity of enzymes related to innate immune function following artificial infection of immunized and non-immunized crayfish. Our results reveal that the activity of four enzymes, phenoloxidase (PO), peroxidas...

The maturation and reproduction of Pacific whiteleg shrimp, Penaeus vannamei, through the practice unilateral eyestalk ablation though common is an animal welfare concern. This study assessed resilience offspring from non-ablated P. vannamei when challenged with isolate Vibrio parahaemolyticus (Vp) causing acute hepatopancreatic necrosis disease (VpAHPND), white spot syndrome virus (WSSV). VpAH...

Viruses are ubiquitous and extremely abundant in the marine environment. One of such marine viruses, the white spot syndrome virus (WSSV), has emerged globally as one of the most prevalent, widespread and lethal for shrimp populations. However, at present there is no treatment available to interfere with the unrestrained occurrence and spread of the disease. The recent progress in molecular bio...

Three different experiments were conducted to study the effect of dietary astaxanthin on the immune response, resistance to white spot syndrome virus (WSSV) and transcription of antioxidant enzyme genes in Pacific white shrimp Litopenaeus vannamei. Each experiment included one triplicate treatment group (fed with 80 mg/kg astaxanthin supplemented diet) and one triplicate control group (fed with...

Pacific white shrimp (Penaeus vannamei or Litopenaeus vannamei) is native to South America, high economic value, and widely cultivated in the world Vietnam. Over last two decades, viral diseases have seriously threatened aquaculture industry. Among diseases, spot syndrome virus (WSSV) most important pathogens of farming. WSSV causes a cumulative mortality can reach 100% within 3–10 days. Genome...

This research study tested the protective effect of prolonged exposure shrimp food supplemented with glucans from shrimp-pond related yeasts on Penaeus vannamei reared under presence white spot syndrome virus (WSSV). The extracted and purified isolated marine identified as Debaryomyces hansenii, Candida tropicalis, humilis, glabrata, Pichia kudriavzevyi, Wickerhamomyces anomalus terrestrial Sac...

BACKGROUND Outbreaks of white spot disease have had a large negative economic impact on cultured shrimp worldwide. However, the pathogenesis of the causative virus, WSSV (whit spot syndrome virus), is not yet well understood. WSSV is a large enveloped virus. The WSSV virion has three structural layers surrounding its core DNA: an outer envelope, a tegument and a nucleocapsid. In this study, we ...

MicroRNAs (miRNAs) integrate with Argonaut (Ago) to create the RNA-induced silencing complex, and regulate gene expression by silencing target mRNAs. RNA editing of miRNA may affect miRNA processing, assembly of the Ago complex and target mRNA binding. However, the function of edited miRNA, assembled within the Ago complex, has not been extensively investigated. In this study, sequence analysis...

In this study, we characterize a novel white spot syndrome virus (WSSV) structural protein, VP51A (WSSV-TW open reading frame 294), identified from a previous mass spectrometry study. Temporal-transcription analysis showed that vp51A is expressed in the late stage of WSSV infection. Gene structure analysis showed that the transcription initiation site of vp51A was 135 bp upstream of the transla...