Disease Agent Description Symptom/Organ affected Vector cure
Bubonic Plague Yersinia pestis Gram - ve, rod
  1. Lymph node, blood, lungs
  2. Buboes,Pneumonia, septicemia
 Rat, Flea
  1. Tetracycline
  2. vaccine of dead bacteria
Lyme disease Borrelia burgdorferi Spirochete
  1. Skin, Joints, Heart.
  2. Large round skin lesions.
 Tick
  1. Tetracycline, Penicillin
  2. No vaccine.
Rocky Mountain spotted fever Rickettsia prowazekii Rickettsia
  1. Blood, Skin
  2. diarrhea, and extreme dehydration
 		 Tick
  1. Tetracycline
  2. vaccine of killed Bacteria