St Louis encephalitis
Concise Oxford English Dictionary © 2008 Oxford University Press:
St Louis encephalitis/s(ə)ntˈluːɪ(s)ɛnkɛfəˈlʌɪtɪs/
▶noun a form of viral encephalitis which can be fatal and is transmitted by mosquitoes.
– origin from the name of St Louis in Missouri, US.
'St Louis encephalitis' also found in these Oxford entries:

