Based on differences in IS1245 RFLP, 16S-23S rDNA ITS and growth temperature, Mijs et al. 2002.[1] 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.