Yersinia pestis: The bacteria that causes the bubonic plague which in the year 541 (as the Black Death) and later in the Middle Ages decimated Europe. The effects of the plague are described in the nursery rhyme We all fall down.. Y. pestis mainly infects rats and other rodents which are the prime reservoir for the bacteria. Fleas are the prime vectors carrying the bacteria from one species to another. They bite rodents infected with Y. pestis, then they bite people and so transmit the disease to them. Transmission of the plague to people can also occur from eating infected animals such as squirrels. Once someone has the plague, they can transmit it to another person via aerosol droplets.
Other symptoms of reactive arthritis include: 1  feeling unusually tired (fatigue). 2  mild fever (a high temperature between 37-38Â°C or 98.6-101.0Â°F). 3  mouth ulcers. 4  painless white rashes inside your mouth. 5  a skin rash. 6  your nails can become thick and crumbly.
Reactive arthritis can have any or all of these features: 1  Pain and swelling of certain joints, often the knees and/or ankles. 2  Swelling and pain at the heels. 3  Extensive swelling of the toes or fingers.  Persistent low back pain, which tends to be worse at night or in the morning.