21.   Scientists do not know whether the virus can persist in infected mosquitoes while they hibernate over the winter, Gubler said.

22.   So far, Arizona officials have not found infected mosquitoes, but there have been several hundred cases of the illness along the Mexico-Texas border.

23.   So far this year, no infected mosquitoes have been trapped in Connecticut, Rhode Island or Nassau County, health officials said.

24.   The infected mosquitoes, which were first detected last week in Westerly, R.I., were found Wednesday in a fifth Rhode Island community, South Kingston.

25.   The virus that causes yellow fever is spread by infected mosquitoes, not people.

26.   The virus usually resides in birds, but it can be spread to humans and other mammals by infected mosquitoes that feed on infected birds before biting.

27.   They were not the first infected mosquitoes to be found in the state.

28.   A person contracts malaria when an infected mosquito injects the virus into the bloodstream and the parasite initially lodges in the human liver.

29.   A person contracts malaria when an infected mosquito injects parasitic microbes into the bloodstream.

30.   Also, a mosquito carrying the virus was found in Orange County and infected mosquitoes were detected in Stamford, Conn.