Acute hepatopancreatic necrosis disease (AHPND) has recently been found to be caused by a pathogenic strain of Vibrio parahaemolyticus. This updated disease card provides a summary and guidance on:

• Disease signs at the pond level.
• Disease signs at animal level by histopathology, including slides.
• Molecular diagnostic tools.
• Host range.
• Presence in Asia-Pacific.
• Prevention and control.
• Links to further information.