leptospira

noun

lep·​to·​spi·​ra ˌlep-tō-ˈspī-rə 

1

capitalized : a genus of extremely slender aerobic spirochetes (family Leptospiraceae) that are free-living or parasitic in mammals and include a number of important pathogens (as L. icterohaemorrhagiae of Weil's disease or L. canicola of canicola fever)

2

plural leptospira or leptospiras or leptospirae -rē  : leptospire