Azospirillum spp

It appears the first case of human health effects was documented in 2013.

Diagnostic Microbiology and Infectious Disease
Volume 76, Issue 4, Pages 513–515, August 2013

Granulomatous infection of the hand and wrist due to Azospirillum spp.
Abstract
We report a case of Azospirillum infection manifestating as granulomatous tenosynovitis of the right hand, in an
immunocompetent middle-aged female. We highlight the unusual source of the infection, the diagnostic workup, as
well as the treatment approach.
http://www.dmidjournal.com/article/S0732-8893(13)00249-6/abstract?cc=y=?cc=y=
http://www.ncbi.nlm.nih.gov/pubmed/23685031
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