Hi Cemc,
Whilst Klebsiella pneumoniae is capable of causing pneumonia it rarely does so. Most bacterial pneumonias involve Streptococcus pneumoniae, Haemophilus influenza, Moraxella catarrhalis, Chlamydia species or Mycoplasma, or a combination of these.
Klebsiella pneumoniae is more commonly seen in urinary tract infections, and sometimes septicaemia.
Regards David.