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 | | In North America, we think of this most frequently with plants such as kudzu and dandelions, but many animals were also introduced. |
 | | The most dangerous of these are the ubiquitous Rattus norvegicus (the urban gray rat) and Mus musculus (the domestic house mouse), which were introduced into the Americas from the Old World, bringing with them plague, rickettsialpox, Seoul virus and lymphocytic choriomeningitis virus. |
 | | Aedes aegypti, the mosquito vector of dengue and yellow fever, was also introduced into the Americas, carrying those viruses and making possible their spread across the entire Region. |
| www.paho.org /english/dpi/Number14_article3_2.htm (942 words) |
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