Innate immune response of silver catfish (Rhamdia quelen) exposed to atrazine

► The effect of atrazine on silver catfish innate immune response was evaluated. ► Atrazine reduced phagocytosis and serum bactericidal activity. ► Exposure to atrazine might increase fish susceptibility to invading microorganism. ► Silver catfish health can be compromised on atrazine contaminated water.