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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 (disease) Yersinia pestis seen at 200× magnification with a fluorescent label. 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 ...
The foregut of this flea is blocked by a Y. pestis biofilm; when the flea attempts to feed on an uninfected host, Y. pestis from the foregut is regurgitated into the wound, causing infection. The bubonic plague is an infection of the lymphatic system, usually resulting from the bite of an infected flea, Xenopsylla cheopis (the Oriental rat flea ...
Flea allergy dermatitis is an eczematous itchy skin disease of dogs and cats. For both of these domestic species, flea allergy dermatitis is the most common cause of skin disease. Affected animals develop allergic reactions to chemicals in flea saliva. Symptoms of this reaction include erythema (redness), papules (bumps), pustules (pus-filled ...
Yersinia pestis seen at 2000× magnification. This bacterium, carried and spread by the flea, is generally thought to have been the cause of millions of deaths. [2]Several possible causes have been advanced for the Black Death; the most prevalent is the bubonic plague theory. [3]
25,000,000 – 50,000,000 (estimated) The Black Death was a bubonic plague pandemic occurring in Europe from 1346 to 1353. It was one of the most fatal pandemics in human history; as many as 50 million people [2] perished, perhaps 50% of Europe's 14th century population. [3] The disease is caused by the bacterium Yersinia pestis and spread by ...
Cat flea. The cat flea (scientific name Ctenocephalides felis) is an extremely common parasitic insect whose principal host is the domestic cat, although a high proportion of the fleas found on dogs also belong to this species. [3] This is despite the widespread existence of a separate and well-established "dog" flea, Ctenocephalides canis.
Michael Peter Balzary (born October 16, 1962), known professionally as Flea, is an American musician and actor. He is a founding member and bassist of the rock band Red Hot Chili Peppers and, along with the vocalist Anthony Kiedis, appears on every one of their albums. Flea was born on October 16, 1962, in Melbourne, Victoria, Australia; his ...