There are several different clinical manifestations of<unk>  The most common form is bubonic<unk>  followed by septicemic and pneumonic<unk>  Other clinical manifestations include<unk> meningitis,<unk> pharyngitis, and ocular<unk> General symptoms of<unk> include fever, chills, headaches, and nausea. Many people experience swelling in their lymph nodes if they have bubonic<unk>  For those with pneumonic<unk>  symptoms may (or may not) include a cough, pain in the chest, and haemoptysis. Bubonic<unk> Swollen inguinal lymph glands on a person infected with the bubonic<unk>  The swollen lymph glands are termed buboes from the Greek word for groin, swollen gland: bubo. When a flea bites a human and contaminates the wound with regurgitated blood, the<unk> causing bacteria are passed into the tissue. Y. pestis can reproduce inside cells, so even if phagocytosed, they can still survive. Once in the body, the bacteria can enter the lymphatic system, which drains interstitial fluid.<unk> bacteria secrete several toxins, one of which is known to cause beta-adrenergic blockade. Y. pestis spreads through the lymphatic vessels of the infected human until it reaches a lymph node, where it causes acute lymphadenitis. The swollen lymph nodes form the characteristic buboes associated with the disease, and autopsies of these buboes have revealed them to be mostly hemorrhagic or necrotic. If the lymph node is overwhelmed, the infection can pass into the bloodstream, causing secondary septicemic<unk> and if the lungs are seeded, it can cause secondary pneumonic<unk>  Septicemic<unk> Septicemic<unk> resulting in necrosis Lymphatics ultimately drain into the bloodstream, so the<unk> bacteria may enter the blood and travel to almost any part of the body. In septicemic<unk>  bacterial endotoxins cause disseminated intravascular coagulation (DIC), causing tiny clots throughout the body and possibly ischemic necrosis (tissue death due to lack of circulation/perfusion to that tissue) from the clots. DIC results in depletion of the body's clotting resources so that it can no longer control bleeding. Consequently, there is bleeding into the skin and other organs, which can cause red and/or black patchy rash and hemoptysis/hematemesis (coughing up/ vomiting of blood). There are bumps on the skin that look somewhat like insect bites; these are usually red, and sometimes white in the center. Untreated, the septicemic<unk> is usually fatal. Early treatment with antibiotics reduces the mortality rate to between 4 and 15 percent. Pneumonic<unk> The pneumonic form of<unk> arises from infection of the lungs. It causes coughing and thereby produces airborne droplets that contain bacterial cells and are likely to infect anyone inhaling them. The incubation period for pneumonic<unk> is short, usually two to four days, but sometimes just a few hours. The initial signs are indistinguishable from several other respiratory illnesses; they include headache, weakness, and spitting or vomiting of blood. The course of the disease is rapid; unless diagnosed and treated soon enough, typically within a few hours, death may follow in one to six days; in untreated cases, mortality is nearly 100%.
Plague 
Polymeal
Black rot 
Anthrax
Scabies
Larva currens
Scrub typhus
Listeriosis