Erratum to: J Infect Chemother (2013) 19:628–632 DOI 10.1007/s10156-012-0529-x

An error occurred in the third sentence of the Abstract. The sentence should read as follows: In the convalescent stage, paired serum showed positive results (IgM, 98.5 %; IgG, 94.0 %).

We apologize for the error.