ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti θɹˈiː, ɐ tˈoʊɾəl ʌv fˈoːɹɾi sˈɛvən kənfˈɜːmd kˈeɪsᵻz wɜː ɹᵻpˈoːɹɾᵻd ɪn ɐ sˈɜːveɪ spˈɑːnsɚd baɪ ðə sˈɛntɚz fɔːɹ dɪzˈiːz kəntɹˈoʊl.
In 1993, a total of 47 confirmed cases were reported in a survey sponsored by the Centers for Disease Control.