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.
Plague, caused by the Gram-negative bacterium Yersinia pestis, is a highly virulent disease believed to have killed millions during three historic human pandemics. It remains a threat worldwide and is a potential agent of bioterrorism.arly-phase transmission of Y. pestis by fleas could be a key mode of transmission because it would greatly increase the rate of enzootic or epizootic spread (5, 11, 14). In this report we show that early-phase transmission by O. montana is efficient in the absence of block formation.