Research Journal of Veterinary Sciences1819-19082151-786xScience International10.3923/rjvs.2012.13.24Penaeus monodon Exposed to Different Levels of Ammonia and Subsequent Infection to WSSV]]>FouziM.N. Mohamed ShariffMohamed YusoffFatimah Md 1201251Accumulation of ammonia is toxic and can cause stress in cultured animals leading to immune depression and increase susceptibility to diseases in aquaculture systems. The present study was aimed to quantify stress in shrimp exposed to different levels of total ammonia nitrogen, TAN, (8.1, 3.8 and 1.1 mg L-1) for 10 days and subsequently infect with White Spot Syndrome Virus (WSSV) by feeding positive WSSV shrimp. Haemo-chemicals alanine transaminase (ALT), aspartate transaminase (AST), total protein (TP), glucose and electrolytes (Na+, Cl¯, K+) were measured to quantify the stress caused by ammonia and WSSV infection. 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