Actinobacteria

Actinobacteria is a class of bacteria. 

Most species in this class are Gram-positive. Pathological Mycobacteriaceae and Nocardiaceae species are acid-fast.

There is evidence to suggest that the oldest living organism on Earth may be a Siberian species of Actinobacteria (around half a million years old). 

 

Classification

Domain : Prokaryota, Bacteria  

Kingdom : Bacteria  

Phylum : Firmicutes  

Class : Actinobacteria

 

Order : Actinomycetales  

Family : Cellulomonadaceae (Gram-positive) 

• Tropheryma whipplei : Whipple disease, endocarditis 

Family : Corynebacteriaceae (Gram-positive) 

• Corynebacterium diphtheriae : Diphtheria 

Family : Mycobacteriaceae (Acid-fast)

• Mycobacterium leprae : Leprosy
• Mycobacterium lepromatosis : Leprosy
• Mycobacterium tuberculosis : Tuberculosis
• Mycobacterium ulcerans infection : Buruli ulcer

Family : Nocardiaceae (Acid-fast)

• Nocardia asteroides : Nocardiosis 
• Nocardia brasiliensis : Nocardiosis  

Family : Propionibacteriaceae (Gram-positive)

• Cutibacterium acnes : Acne vulgaris

 

Order : Bifidobacteriales (Gram-positive) 

Family : Bifidobacteriaceae (Gram-positive) 

• Gardnerella vaginalis : Bacterial vaginosis