FIG 7.

H&E-stained shrimp hepatopancreatic tissue from experimental challenge assays. Moribund shrimp from the groups immersed in 5HP and XN89 showed massive sloughing of hepatopancreatic tubule epithelial cells characteristic of AHPND. Samples from moribund shrimp exposed to XN87 showed a mixture of normal (N) and collapsed (C) hepatopancreatic tubule epithelia. The histology of the hepatopancreas was normal in survivors and moribund shrimp in the TSB and non-AHPND VPS02 immersion control groups.