Trickle-up theory (reverse adaptation) 1  It starts from street fashion to high fashion. 2  Since 1960s designers and manufactures pay more attention to the customers innovations 3  . They watch people on street to find ideas. 4  The âgypsyâ look is a good example of a street look which reached the runway.
Plague. Plague is an infectious disease caused by bacteria called Yersinia pestis. These bacteria are found mainly in rodents, particularly rats, and in the fleas that feed on them.Other animals and humans usually contract the bacteria from rodent or flea bites.ersinia pestis bacteria are found in animals throughout the world, most commonly in rats but occasionally in other wild animals, such as prairie dogs. Most cases of human plague are caused by bites of infected animals or the infected fleas that feed on them.
Scanning electron micrograph of Yersinia pestis, which causes bubonic plague, on proventricular spines of a Xenopsylla cheopis flea. NIAID. Yersinia pestis (sometimes spelled Yersina) is the name of the bacteria that causes the bubonic plague.. pestis is primarily the cause of disease in a wide variety of rodents, including marmots, ground squirrels, gerbils, and prairie dogs, and, most famously, rats, specifically the black rat (Rattus rattus) (and almost certainly not the brown rat (R. norvegicus), despite what you might have heard).