News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.

Donald V. Lightner

Health & Welfare

New management tools for EHP in penaeid shrimp

Authors examined the histological features from shrimp infected with the emerging microsporidian parasite Enterocytozoon hepatopenaei (EHP). A PCR assay method was used to detected in hepatopancreatic tissue, feces and water sampled from infected shrimp tanks, and in some samples of 

Health & Welfare

PCR methods characterize AHPND V.p isolates

In analyzing the plasmid sequence from the whole genome sequences of AHPND V. parahaemolyticus (V.p) isolates, researchers identified a clear geographical variation within the plasmid, and developed PCR methods to characterize AHPND V.p isolates as either Mexico-type or Southeast Asia-type. 

Health & Welfare

EMS/AHPNS: Infectious disease caused by bacteria

Studies by the University of Arizona Aquaculture Pathology Laboratory identified the causative agent for AHPNS as a unique strain of Vibrio parahaemolyticus bacteria that can produce toxins responsible for the primary pathology in affected shrimp. 

Health & Welfare

Study: TSV exposure may lessen YHV effects in white shrimp

Since Taura syndrome virus was in the Americas when yellow head virus become pandemic in Asia, it is possible TSV prevented shrimp in the Western Hemisphere from infection by materials from Asia containing YHV. To test this idea, the authors 

Health & Welfare

New WSSV, TSV genotypes identified in Saudi Arabia

To determine origins of White Spot Syndrome Virus and Taura Syndrome Virus in Saudi Arabia, authors performed genotyping studies and found a new genotype in each of the isolates collected. 

Health & Welfare

Early Mortality Syndrome affects shrimp in Asia

Early Mortality Syndrome is a new disease that has been detected at shrimp farms in Asia. It appears within 30 days of stocking and causes symptoms that include lethargy; soft, darkened shells and mottling of the carapace.