Coccobacillus, Clostridium . Streptococcus , Staphylococcus , Micrococcus , diplococcus. Streptococcus pneumoniae , Neisseria gonorrhoeae . Glycocalyx - Capsule, Slime layer. Protective layer - dessication, bacteriophages, phagocytosis.
Pathogens avoid phagocytosis by having capsule.
The capsule gives a slimey appearance. Ability to cause disease is due to the capsule. Severity of pneumonia depends of how efficiently the capsule allows thePC to avoid phagocytosis. Immunity to PC pneumonia is type specific. PC are part of the normal microflora.