mycobacterium avium hominissuis mycobacterium avium hominissuis "mycobacterium avium hominissuis" is a subspecies of the phylum actinomycetota (gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus mycobacterium. mycobacterium alvei scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: mycobacteriaceae genus: mycobacterium species: m. avium subspecies: "m. a. hominissuis" trinomial name "mycobacterium avium hominissuis" suggested name for mycobacterium avium avium isolates from humans and pigs. based on differences in is1245 rflp, 16s-23s rdna its and growth temperature, mijs et al. 2002. propose to reserve the designation mycobacterium avium subsp. avium for bird-type isolates. these authors suggest, but not formally propose, the designation mycobacterium avium subsp. hominissuis for the isolates from humans and pigs.