In the report “Effects of the second-generation synthetic lipid A analogue E5564 on responses to endotoxin equine whole blood and monocytes,” (Am J Vet Res 2008;69:796–803), the title on page 796 was incorrect and should be, “Effects of the second-generation synthetic lipid A analogue E5564 on responses to endotoxin in equine whole blood and monocytes.”