Canine ehrlichiosis caused simultaneously by Ehrlichia canis and Ehrlichia platys.

To identify the causative agent of canine ehrlichiosis that has occurred in the suburbs of Guangzhou, China, since 1998, the 16S rRNA gene was amplified and sequenced. Two sequences of 1,482 and 1,483 base pairs were obtained and named as Gzh981 and Gzh982, respectively. The level of similarity of these two was 91.50%, and Gzh981 closely resembled the 16S rRNA gene of Ehrlichia canis, whereas Gzh982 resembled Ehrlichia platys. We therefore conclude that E. canis and E. platys together caused recent outbreaks of canine ehrlichiosis in China.