Following a
challenge test by injection with infectious myonecrosis virus (IMNV), the levels of PO and respiratory
burst (RB) activity in the shrimp of all biofloc treatments were higher than that of the challenged shrimp
from the control treatment. An increased immunity was also suggested by the survival of the challenged
shrimp from the experimental biofloc groups that was significantly higher as compared to the challenged
shrimp from the control treatment, regardless of the organic carbon source used to grow the bioflocs.