Meningitis is a relatively rare infection that affects the delicate membranes -- called meninges (men-in'-jeez) -- that cover the brain and spinal cord. Bacterial meningitis can be deadly and contagious among people in close contact. Viral meningitis tends to be less severe and most people recover completely without specific therapy. Fungal meningitis is a rare form of meningitis and generally occurs only in people with weakened immune systems.
The Black Death is thought to have originated in the arid plains of Central Asia, where it then travelled along the Silk Road, reaching Crimea by 1343. From there, it was most likely carried by Oriental rat fleas living on the black rats that were regular passengers on merchant ships.
plague is believed to be the cause of the black death that swept through asia europe and africa in the 14th century and killed an estimated 50 million people this was about 25 % to 60 % of the european population because the plague killed so many of the working population wages rose due to the demand for laborn the bubonic form of plague the bacteria enter through the skin through a flea bite and travels via the lymphatics to a lymph node causing it to swell diagnosis is by finding the bacterium in the blood sputum or fluid from lymph nodes