streptococcus pneumonia Flashcards
shape
lancet-shaped diplocci
alpha, gamma, or beta hemolytic
alpha hemolytic
S. pneumonia capsule
antiphagocytic
- differs from strain to strain
quelling test
biochemical reaction in which antibodies bind to a bacterial capsule. a positive reaction causes hte capsule to swell
reservoir
humans
__ part of the normal microbiota of the ___
transient, nasopharynges
transmitted via
contact with respiratory droplets
main disease caused
otitis in infants and young children
community-acquired bacterial pneumonia
what is the biggest risk factor for getting a bacterial ear infection
viral infections of the upper respiratory tract
otitis media
viral URT infections create exudate that washes the bacteria from the nasopharyngeal microbiota into the middle year by way of the Eustachian tube
- fluid, pus collect bind eardrum, cause pressure
pneumococcal pneumonia
human carriers
- bacteria rarely reach lung
risk of pneumonia rises when mucociliary escalators damaged/non functional
predisposing factors of pneumonia
ciliated epithelium damaged by viruse, smoking, chemicals
bacteria enter LRT and infect alveoli
development of pneumonia
growth of streptococci on damaged ciliated epithelium
growth in alveoli, which stimulates increased fluid accumulation
signs and symptoms of pneumonia
cough; fever; congestion; chest pain; rust tinged sputum
breathing becomes shallow and rapid
skin becomes dusky due to poor oxygenation
children’s vaccine against S. pneumonia
pneumococcal conjugate vaccine (PCV 13)
- 13 valent –> protection against 13 serotypes
