### condition | illness | disease | communicable disease | infectious disease | dysentery:

Shigellosis
- dysentery
* bacterial infection affecting the intestinal tract.
* bacterial infection that affects the guts
  - intestines
  - intestinal infection
* can also cause severe dehydration and other complications, like kidney failure.
* highly contagious form of dysentery, caused by shigellae bacteria.
* is an important public health problem, especially in developing countries
  - caused by fecal contamination and is contagious
  - contracted by eating or drinking contaminated food or water
  - extremely rare below the age of six months
  - more common in summer than winter
  - self limiting and requires the replacement of fluid and electrolytes
  - transmitted strictly by human feces
* usually resolves in five to seven days but can last for weeks

Endemic typhus
* is an infectious disease
  - carried by fleas
* occurs most commonly in warm, coastal regions.

Epidemic disease
* Some epidemic diseases are caused by caterpillars.
* are much more serious for forest trees than for comparable agricultural crops.
* occur everywhere where there have been radiation accidents.
* require awareness.

### condition | illness | disease | communicable disease | infectious disease | epidemic disease:

Bubonic plague
* begins in China and India, killing an estimated three million over the next decade.
* causes very painful, swollen lymph nodes, called buboes.
* constitutes about three-fourths of plague cases.
* has a vaccine.
* is among the more virulent infectious diseases
  - an epidemic disease
  - located in attics
  - one of the disease's three forms
  - primarily a disease of rodents, spread by fleas
  - seen in the swellings, or buboes
  - spread through the bite of fleas infected with the bacteria
  - the medical term
* is transmitted by fleas
  - the rat flea
* occurs primarily in areas where there are large communities of burrowing rodents
  - when the infection primarily involves the human lymphatic system.
  * breaks out in England
* severe infection in humans and many species of rodents.

Pestilence
* are contagious or communicable diseases
  - influence
* is an epidemic disease

### condition | illness | disease | communicable disease | infectious disease | epidemic disease:

Pneumonic plague
* affects victim's lungs, with lungs filling up with frothy blood.
* can also be primary or secondary.
* can spread from person to person independently of animal reservoirs or vectors
* develops when the bacteria reaches the lungs.
* is airborne.
  - infection of the lungs with the plague bacillus
  - highly transmissible person-toperson
  - inhaled from infected cats
  - nearly always fatal
  - rapidly fatal due to hemorrhagic necrosis of the lung and resulting cyanosis
  - systemic plague with lung involvement
  - the least common, but most dangerous, form of plague
* more virulent form.
* occurs when the infection enters the lungs, causing the victim to vomit blood.

### condition | illness | disease | communicable disease | infectious disease | epidemic disease:

Septicemic plague
* can cause the blood to form small clots through the body.
* occurs when the bloodstream is invaded
  - plague bacteria get into the blood.
  * can cause the blood to form small clots through the body. Without treatment it is almost always fatal. The death rate in medieval times was 99-100 percent. Septicemic plague is the rarest of the three plagues that struck Europe in 1348, the other forms are bubonic and pneumonic plague. In rare cases it can also enter the body through an opening in the skin or by cough from another infected human. In septicemic plague the bacteria grow quickly in the blood, causing severe sepsis

Fever blister
* is an infectious disease
* tend to merge and then collapse.