bacterial infections of the repsiratory system

Strep Throat (upper respiratory)

 sore throat, fever, petechia (red dots in throat), pus patches. 2-5 days from contact or droplet exposure

Strep throat causative organism

strep pyogenes(pos)

Strep throat virulence factor

endotoxins which lyse immune cells and RBC

Strep throat treatment 

Penicillin or Amoxicillin 

Strep throat diagnosis 

rapid test or throat culture (high false neg rate 20%)

Tuberculosis

Cough, weight loss, fever, night sweats 3-9 weeks through droplet or aerosol

TB causitive organism 

mycobacterium tuberculosis (long term infection)(acid-fast)

TB virulence factor

cell surface-exposed lipids that help in evading the host's immune system.

TB treatment 

Izoniazid or Rifampin

TB diagnosis

Mantoux test (PPD), Chest X-ray (CXR)

Pneumonia(walking)

productive cough, dyspnea, fever, chest pain from droplet 1-2 days

pneumonia causitive organism

Strep pneumoniae (g. pos)

haemophilus influenzae(g. neg)

mycoplasma pneumoniae(a. fast)

klebsiella pneumoniae(g. neg)

pseudomonas aeruginosa(g. neg)

pneumonia diagnosis

CBC, CXR, Sputum culture

pneumonia treatment

per organism: Azithromycin, amoxicillin etc