LRTI includes pneumonia, lung abscess and acute bronchitis. Symptoms include shortness of breath, weakness, fever, coughing and fatigue. Influenza affects both upper and lower respiratory tracts
URTI affects nose, sinuses, pharynx, larynx or trachea. 17.2 billion cases occurred in 2015, down from 4,000 in 1990. Most infections are viral, some bacterial, less common fungal or helminthic
TSS is caused by bacterial toxins, typically Streptococcus pyogenes or Staphylococcus aureus. Symptoms include fever, rash, skin peeling, and low blood pressure. Disease progression involves superantigen toxin production. Up to 20% of body's T-cells can be activated simultaneously
SIRS is an exaggerated body response to noxious stressors. SIRS with suspected infection is called sepsis. Severe sepsis includes end-organ failures, septic shock is hemodynamic instability. MODS represents altered organ function in acutely ill septic patients
Herpes appears as blistering sores that can merge and break open. Prodromal symptoms precede outbreaks, including genital pain and flu-like symptoms. Genital herpes outbreaks typically last 7-10 days, healing takes over a week
Pathogens are tiny organisms that cause diseases in the body. Main types include bacteria, viruses, fungi, and protozoa. Not all pathogens are harmful, some help the body