granulicatella granulicatella granulicatella is a genus of bacteria from the family of carnobacteriaceae. these bacteria occurs in the upper respiratory tract, in the gastrointestinal tract, and the urogenital tract. granulicatella bacteria can cause disease in humans in rare cases. granulicatella scientific classification domain: bacteria phylum: bacillota class: bacilli order: lactobacillales family: carnobacteriaceae genus: granulicatellacollins and lawson 2000 species g. adiacens g. balaenopterae g. elegans g. paraadiacens