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.
Through additional revisions, the genus Yersinia has grown to include eleven species (2, 9, 10, 51), three of which are potentially pathogenic to humans: Y. pestis, Y. pseudotuberculosis, and Y. enterocolitica. Of these, Y. enterocolitica is most important as a cause of foodborne illness.irulent strains of Yersinia also invade mammalian cells such as HeLa cells in tissue culture (29). However, strains that have lost other virulent properties retain HeLa invasiveness, because the invasive phenotype for mammalian cells is encoded by chromosomal loci.