Klebsiella bacterial infections cause symptoms that vary depending on the site of the infection. People often develop klebsiella infections because they have impaired immunity from being sick or required medical interventions. Mechanical ventilators, indwelling tubes that drain urine, burns and open wounds all favor the development of klebsiella infection. Symptoms include those of pneumonia, urinary tract infection and skin and soft tissue infections. They tend to develop in people who are hospitalized or being cared for in a long-term facility.