NCIt definition : A species of anaerobic, Gram negative, rod shaped bacteria assigned to the phylum
Proteobacteria. This bacteria is nonmotile, oxidase and urease positive, weakly catalase
positive, does not hydrolyze esculin and produces acid from glucose, lactose and xylose.
A. equuli is a commensal organism of the horse upper respiratory tract but may cause
disease in foals and zoonotic infections in humans.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Actinobacillus equuli.;