pilibacter pilibacter pilibacter is a genus of bacteria of the enterococcaceae. this genus contains a single species, pilibacter termitis, strains of which were isolated from a termite (coptotermes formosanus shiraki). pilibacter scientific classification domain: bacteria phylum: bacillota class: bacilli order: lactobacillales family: enterococcaceae genus: pilibacterhigashiguchi et al. 2006 species pilibacter termitis bacteria in this genus have been found in the respiratory tracts of human patients with pulmonary tuberculosis.