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Plague, a disease that affects humans and other mammals, is caused by the bacterium Yersinia pestis. The human flea can be a carrier of the plague bacterium, although it is an exceptionally very poor vector of transmission. [4] Plague is infamous for killing millions of people in Eurasia during the Middle Ages. Without prompt treatment, the ...
There are more than 2,000 species of tiny (0.04 to 0.15 inches), wingless, blood-sucking fleas that live on the body of the host they infest. Although fleas cannot fly, they have developed ...
The disease was spread to humans by rodents, such as the black rat, which were bitten by infected fleas. Major outbreaks included the Plague of Justinian , about 540, and the Black Death , about 1350, each of which killed a sizeable fraction of the world's people.
Since they are associated with humans, they are common disease vectors that can spread from animals to humans. Diseases that can be spread through fleas include the plague and typhus. [1] The rat flea is widespread due to their relationship to rodents and other vertebrates. [2] They can be found co-infecting their host with other parasites. [3]
Fleabite and mosquito bite symptoms. Both fleabites and mosquito bites cause itching, but there are ways to tell them apart based on symptoms.. Fleabites. A fleabite can look like other insect ...
Pulicosis is a skin condition caused by several species of fleas, including the cat flea (Ctenocephalides felis) and dog flea (Ctenocephalides canis). This condition can range from mild irritation to severe irritation. In some cases, 48 to 72 hours after being bitten, a more severe rash-like irritation may begin to spread across the body.
Due to the expanding flea, the outer layer of the skin is stretched thin, resulting in the appearance of a white halo around the black dot (rear end of the flea) at the center of the lesion. [9] The black dot is the flea's exposed hind legs, respiratory spiracles and reproductive organs .
It took 10 doctors for someone to uncover the real diagnosis. I was told I had stage 4B Hodgkin’s lymphoma, a rare form of cancer that can affect people in their 20s and 30s. My response to the ...