Human microbiome, conceptual illustration · ANDRZEJ WOJCICKI/SCIENCE PHOTO LIBRARY
Bacterial colony, LM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
S. maltophilia bacteria, TEM · CENTRE FOR INFECTIONS/PUBLIC HEALTH ENGLAND/SCIENCE PHOTO LIBRARY
Enterococcus faecalis dividing, TEM · CENTRE FOR INFECTIONS/PUBLIC HEALTH ENGLAND/SCIENCE PHOTO LIBRARY
Meningitis bacteria, illustration · KATERYNA KON/SCIENCE PHOTO LIBRARY
Antibiotic sensitivity testing · DANIELA BECKMANN / SCIENCE PHOTO LIBRARY
Microbiology · TEK IMAGE/SCIENCE PHOTO LIBRARY
Pseudomonas sp. bacterium, TEM · DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY
Bacteria, artwork · ALFRED PASIEKA/SCIENCE PHOTO LIBRARY
E. coli bacteria, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
E. coli with fimbriae, TEM · DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY
Coloured TEM of T4 bacteriophage infecting E. coli · BIOZENTRUM, UNIVERSTIY OF BASEL/SCIENCE PHOTO LIBRARY
Helicobacter pylori bacteria, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Sepsis, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Bacterial growth on culture media · DANIELA BECKMANN / SCIENCE PHOTO LIBRARY
Gonorrhoea bacteria, Illustration · MAURIZIO DE ANGELIS/SCIENCE PHOTO LIBRARY
Staphylococcus bacteria, illustration · MAURIZIO DE ANGELIS/SCIENCE PHOTO LIBRARY
Bacteria infecting a macrophage, SEM · SCIENCE PHOTO LIBRARY
MRSA bacteria, SEM · SCIENCE PHOTO LIBRARY
Streptococcus bacterium dividing, SEM · MARTIN OEGGERLI/SCIENCE PHOTO LIBRARY
Macrophage engulfing TB bacteria, SEM · SCIENCE PHOTO LIBRARY
Acidovorax bacteria, SEM · EYE OF SCIENCE/SCIENCE PHOTO LIBRARY
Root nodule · DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY
E. coli bacteria, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Oral bacteria, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Drug-resistant Salmonella bacteria · CDC/ Melissa Brower/SCIENCE PHOTO LIBRARY
Streptococcus pyogenes bacteria, 3D image · CDC/ Melissa Brower/SCIENCE PHOTO LIBRARY
Gingivitis, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Saliva and bacteria, SEM · SCIENCE PHOTO LIBRARY
Microbiome, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Bacteria found on mobile phone, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Nasal bacterial culture, SEM · STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Scientist examining liquid in bottle · CAIA IMAGE/SCIENCE PHOTO LIBRARY