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Bubonic plague is one of three types of plague caused by the bacterium Yersinia pestis. [1] One to seven days after exposure to the bacteria, flu-like symptoms develop. [1] These symptoms include fever, headaches, and vomiting, [1] as well as swollen and painful lymph nodes occurring in the area closest to where the bacteria entered the skin. [2]
Consequently, the unclotted blood bleeds into the skin and other organs, leading to a red or black patchy rash and to hematemesis (vomiting blood) or hemoptysis (coughing up blood). The rash may cause bumps on the skin that look somewhat like insect bites, usually red, sometimes white in the centre. [citation needed]
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 centre. Untreated, the septicemic plague is usually fatal.
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Cutaneous anthrax infection in humans shows up as a boil-like skin lesion that eventually forms an ulcer with a black center , often beginning as an irritating and itchy skin lesion or blister that is dark and usually concentrated as a black dot. Cutaneous infections generally form within the site of spore penetration between two and five days ...
The black eschar often shows up as a large, painless, necrotic ulcer (beginning as an irritating and itchy skin lesion or blister that is dark and usually concentrated as a black dot, somewhat resembling bread mold) at the site of infection. In general, cutaneous infections form within the site of spore penetration two to five days after exposure.
Porphyria / p ɔːr ˈ f ɪr i ə / is a group of disorders in which substances called porphyrins build up in the body, adversely affecting the skin or nervous system. [1] The types that affect the nervous system are also known as acute porphyria, as symptoms are rapid in onset and short in duration. [1]
Symptoms include red or purple or black skin, swelling, severe pain, fever, and vomiting. [3] The most commonly affected areas are the limbs and perineum. [2] Bacterial infection is by far the most common cause of necrotizing fasciitis. Despite being called a "flesh-eating disease", bacteria do not eat human tissue.