TL;DR: An epidemic of aseptic meningitis caused by human echovirus 9 (E‐9) occurred in the summer of 1997 in northern Kyushu, Japan, and nine isolated viruses were determined, almost identical and closely related to the virulent strain Barty.
Abstract: An epidemic of aseptic meningitis caused by human echovirus 9 (E-9) occurred in the summer of 1997 in northern Kyushu, Japan. Sequences of genome position 2504-3358, which encoded a part of VP1, of the nine isolated viruses were determined. An RGD motif and B-C loop were found in all. They were almost identical and closely related to the virulent strain Barty.