A
- Acetobacter aurantius
- Acinetobacter baumannii
- Actinomyces israelii
- Agrobacterium radiobacter
- Agrobacterium tumefaciens
- Azorhizobium caulinodans
- Azotobacter vinelandii
- Anaplasma
- Anaplasma phagocytophilum
Read more about this topic: List Of Clinically Important Bacteria