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Yersinia pestis (Y. pestis; formerly Pasteurella pestis) is a gram-negative, non-motile, coccobacillus bacterium without spores that is related to both Yersinia enterocolitica and Yersinia pseudotuberculosis, the pathogen from which Y. pestis evolved [1][2] and responsible for the Far East scarlet-like fever.
The plague was thought to be spread by rats, but it was actually bites from fleas on the rats (and then fleas spread from human to human) that spread the infection. Dr. Jeff Hersh Black death ...
Several possible causes have been advanced for the Black Death; the most prevalent is the bubonic plague theory. [3] Efficient transmission of Yersinia pestis is generally thought to occur only through the bites of fleas whose mid guts become obstructed by replicating Y. pestis several days after feeding on an infected host.
Septicemic plague is one of the three forms of plague, and is caused by Yersinia pestis, a gram-negative species of bacterium. Septicemic plague is a systemic disease involving infection of the blood and is most commonly spread by bites from infected fleas. Septicemic plague can cause disseminated intravascular coagulation and is always fatal ...
Aphaniptera. Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by ingesting the blood of their hosts. Adult fleas grow to about 3 millimetres (8 inch) long, are usually brown, and have bodies that are "flattened" sideways or ...
Plague is an infectious disease caused by the bacterium Yersinia pestis. [ 2 ] Symptoms include fever, weakness and headache. [ 1 ] Usually this begins one to seven days after exposure. [ 2 ] There are three forms of plague, each affecting a different part of the body and causing associated symptoms.
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]
Pest (organism) Varied carpet beetle larvae, Anthrenus verbasci, damaging a specimen of Sceliphron destillatorius in an entomological collection. A pest is any organism harmful to humans or human concerns. The term is particularly used for creatures that damage crops, livestock, and forestry or cause a nuisance to people, especially in their homes.