abstract
alveoli
alveolus
antibiotic resistant
aureus
background
bacteria
bacterial
bacterium
blue
causing
cells
cocci
coccus
dangerous
disease
drug resistant
germs
grampositive
haemophilus influenzae
health
illustration
infection
infections
infectious
klebsiella
lung
medical
microbes
microbiology
moraxella catarrhalis
mrsa
mutans
pathogen
pathogenic
pathogens
pneumococcal
pneumococci
pneumococcus
pneumonia
pneumoniae
pulmonary
respirators
sepsis
staphylococcus
streptococcaceae
streptococcal
streptococcus
tract