Disease manifestation in shrimps occurs when the equilibrium between the host, the pathogen and the environment is altered. Most of the diseases occur only when the water quality conditions are stressful to the cultured shrimps. Water quality should therefore be maintained as suggested in Para 3.7. The growth of the shrimps should be monitored continuously to adjust the feeding rate and to assess their well being. Shrimp with any one or more of the following conditions are diagnosed be disease-inactive and sluggish; empty gut, bluish/blackish coloration, with blisters or flared up gills, broken appendages, black/white spots, coloured gills and opaque muscles. In case of disease outbreak a trained pathologist should be consulted.