The majority of states in the USA have reported cases of West Nile Fever (WNF) this year.
In those people who were severely infected, about half went on to develop meningitis or encephalitis. Most cases however, are mild and without symptoms.
This disease was first detected in the States in 1999, and this year’s numbers are the highest so far.
The greatest numbers of cases have occurred in six states (Texas, Mississippi, Luoisiana, Oklahoma, South Dakota and California), with Texas having almost half of those cases.
WNV virus is spread by Culex mosquitos, which bite mainly from dusk to dawn. Travellers should take measures to avoid mosquito bites, such as covering up after dusk and using effective repellents.
Source: ProMED-Mail
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