Dear Fawz,

I think A.vinelandii is very useful to study nitrogenase chemistry.

See link: LYDON, Brian R., LEE, Chi Chung, TANIFUJI, Kazuki, et al. Electrochemical characterization of isolated nitrogenase cofactors from Azotobacter vinelandii. ChemBioChem, 2019.

But, is Azotibacter, pathogenic becteria ? !!!

Herbaspirillum rubrisubalbicans, a nitrogen-fixing bacteria which is causing stripe mottled disease in sugarcane

my Bara

Thanks for the attention and the answer to my question, if the nitrogen fixing bacteria are satisfactory then they are definitely harmful (for example Klebsiella bacteria), but if they are not satisfactory like rhizobia bacteria, they do no harm to humans.

Of Corse my dear Fawz,

But, i think its more appropriate to culturing atmospheric becteria (N fixation), and then assesseming pathogenic effect.