The distinction between the terms renminbi and yuan is similar to that between sterling and pound, which respectively refer to the British currency and its primary unit. One yuan is subdivided into 10 jiao (Chinese: è§; pinyin: jiÇo), and a jiao in turn is subdivided into 10 fen (Chinese: å; pinyin: fÄn).
Fleas are attracted to the warmth that the bodies of their hosts emit, vibrations and carbon dioxide, and they also like warm and carpeted environments where their hosts rest. These parasites feed on the blood of their hosts and can cause a number of conditions including skin infection and irritation, loss of hair and lethargy in their hosts.
A study of 133 New York City rats found 6,500 fleas, lice and mites that can carry bacteria that can cause serious diseases in humans, the study by Cornell and Columbia universities found. Among the creepy critters found were Oriental rat fleas, which are notorious for their role in spreading the bubonic plague, said lead author and Cornell entomologist Matthew Frye.