staphylococcus vitulinus staphylococcus vitulinus staphylococcus vitulinus is a gram-positive, coagulase-negative member of the bacterial genus staphylococcus consisting of clustered cocci. the species was originally isolated from food (beef, chicken, lamb, and other meats) and animals (mammals including horse, vole, and whale) and was named staphylococcus vitulus. the name was later changed to staphylococcus vitulinus for correct latin grammar. staphylococcus vitulinus scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: staphylococcaceae genus: staphylococcus species: s. vitulinus binomial name staphylococcus vitulinuswebster et al. 1994 the species staphylococcus pulvereri, originally isolated from humans and from a diseased chicken carcass, was later determined to be synonymous with s. vitulinus.