Pseudomonas is a bacterial infection caused by Pseudomonas aeruginosa, a microorganism commonly found in soil and water, according to Healthline. Pseudomonas infections usually appear as mild conditions such as swimmer's ear or hot-tub rash, but when they affect people with impaired immune systems, they can be serious.
Infections acquired by people who are already hospitalized for an illness or condition that weakens their immune systems are called nosocomial infections. Pseudomonas bacteria are among the most common pathogens responsible for this type of infection, spread by healthcare workers or on medical equipment or other hospital surfaces. Many cases of pneumonia occur in hospitals because of pseudomonas infections acquired through breathing machines, according to WebMD.
Pseudomonas bacteria also spread in hospitals through intravenous needles and catheters. Patients hospitalized for burns and puncture wounds can develop serious infections of the bones, blood and urinary tract caused by pseudomonas bacteria. Serious eye infections occur if these bacteria spread to contact lens solution or onto unsterilized lenses.
Pseudomonas infections are typically treated with antibiotics, but the pseudomonas bacteria often develops an antibiotic resistance. These infections are sometimes difficult to treat because the bacteria build up resistance to diverse types of antibiotics or become resistant to a particular antibiotic during the course of treatment.