Toxicity of atrazine and nonylphenol in juvenile rainbow trout (Oncorhynchus mykiss): Effects on general health, disease susceptibility and gene expression

► Rainbow trout were exposed to atrazine (ATZ) or nonylphenol (NP) for 4 d. ► Immunotoxic effects were assessed at multiple levels of biological organization. ► Both ATZ and NP altered leukocyte differential and increased disease susceptibility. ► ATZ had a more pronounced effect on immunosuppression at the genomic level. ► These 2 endocrine disrupting chemicals are immunotoxic, warranting further research.