Pseudomonas aeruginosa bacteria — rod-shaped bacteria in this tinted, scanning electron microscope image — are found in soil, water and as normal flora in the human intestine. But they can cause serious wound, lung, skin and urinary tract infections, and many pseudomonas strains are drug-resistant.

Pseudomonas aeruginosa bacteria — rod-shaped bacteria in this tinted, scanning electron microscope image — are found in soil, water and as normal flora in the human intestine. But they can cause serious wound, lung, skin and urinary tract infections, and many pseudomonas strains are drug-resistant.