staphylococcus kloosii staphylococcus kloosii staphylococcus kloosii in a gram-positive, coagulase-negative member of the bacterial genus staphylococcus consisting of single, paired, and clustered cocci. strains of this species were originally isolated from and among the most frequent constituents of normal skin flora and various wild animals. staphylococcus kloosii scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: staphylococcaceae genus: staphylococcus species: s. kloosii binomial name staphylococcus kloosiischliefer et al. 1985