bacteria spirilla black glyph icon. spirochaetes microorganism sign. microbiology concept. pictogram for web, mobile app, promo.

abstract acid aid app art bacilli bacteria bacterial bacterium biology cocci concept design disease drawing element epidemiology germ graphic health care hygiene icon illness illustration immune infection isolated line microbiology microflora microorganism object outline pathogenic pictogram protection retrovirus scientific sick sign simple spirilla spirochaetes symbol test vector viral virology virus web