High Quality Content by WIKIPEDIA articles! Clavibacter michiganensis is an aerobic non-sporulating Gram-positive plant pathogenic actinomycete that currently constitutes the only species within the genus Clavibacter. The other former Clavibacter species have been reclassified to genera Leifsonia, Rathayibacter and Curtobacterium. Clavibacter michiganensis currently has five subspecies; all are available from the NCPPB for legitimate researchers: Clavibacter michiganensis subsp. insidiosus, Clavibacter michiganensis subsp. michiganensis, Clavibacter michiganensis subsp. nebraskensis, Clavibacter michiganensis subsp. sepedonicus and Clavibacter michiganensis subsp. tesselarius. Clavibacter michiganesis subsp. michiganensis and Clavibacter michiganesis subsp. sepedonicus are the main diseases that cause substantial economic losses worldwide by damaging tomatoes and potatoes.