Taxonomy
Family: Enterobacteriaceae
K. pneumoniae subsp pneumoniae
K. pneumoniae subsp. ozaenae
K. pneumoniae subsp.rhinoscleromatis
K. oxytoca

Natural habitats
They are widely distributed in nature and can be found in water, soil, on plants and have been isolated from clinical samples of humans and animals.

They are part of the normal intestinal flora of humans and animals.

Clinical significance
K. pneumoniae & K. oxytoca
They are important causes of nosocomial (hospital-acquired) and community-acquired infections in humans.

They can cause a variety of infections of the urinary and respiratory tract (pneumonia). This species can cause septicemia, peritonitis, meningitis, infections of wounds and burns.