Nigel Cattlin / Bacterial shot hole (Pseudomonas syringae) affected leaves of laurel, Prunus laurocerasus, in a garden hedge, Berkshire, England, UK. May.

Nigel Cattlin / Bacterial blight (Xanthomonas oryzae pv oryzae) disease lesions on Rice (Oryza sativa) crop, Luzon, Philippines

SINCLAIR STAMMERS / Timelapse of filaments of Oscillatoria, a type of Blue green algae gliding over each other, filmed using differential interference contrast.

SINCLAIR STAMMERS / Ciliate protozoan (Blepharisma japonicum) swimming through clumps of bacteria.

Andres M. Dominguez / Bacteria (Lepthotryx discophora) causing iridescent patterns and White willow tree leaf (Salix alba) in river, Sierra de Grazalema Natural Park, southern Spain, November.

Floris van Breugel / A hot spring in the West Thumb Geyser Basin, Yellowstone National Park, Wyoming. The colors are a result of thermophilic bacteria living in the hot springs. December 2010.

Dr. Axel Gebauer / Bacteria - iron and manganese oxidizers and their complementary reducers, in the mud of an empty fish pond, Upper Lusatia Heath and Pond Landscape, Upper Lusatia UNESCO Biosphere Reserve, Germany

Cyril Ruoso / Komodo Dragon (Varanus komodoensis) drooling, the lizard's saliva is high in bacteria and bites quickly become infected, Rinca Island, Komodo National Park, Indonesia

Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...

Jeff Vanuga / Dead Thermal Spider encased in thermophilic bacteria in hot Spring, Yellowstone National Park, Wyoming, USA, October

Igor Shpilenok / Velikan (or "Giant") Geyser, the largest geyser on Kamchatka, periodically shooting to a height of a nine-story building and releasing 30 tons of water per minute. Colonies of thermophilic bacteria co...

Solvin Zankl / Murrays abyssal anglerfish (Melanocetus murrayi) Atlantic ocean. A deep-sea fish with bioluminescent lure used to attract prey. The bioluminescence is produced by symbiotic bacteria; these bacteria ar...