TABLE 1.
Nucleotide differences in a 925-bp fragment of the 16S rRNA gene of three equine Ehrlichia strains in comparison with other ehrlichiaea
| DNA source (reference) | Nucleotide at the position following positionsb:
|
||||
|---|---|---|---|---|---|
| 74 | 78 | 84 | 439 | 886 | |
| E. equic | A | A | A | G | —d |
| E. phagocytophilae | A | A | A | G | —d |
| E. equi MRK (6) | A | A | A | G | G |
| HGE agent | A | A | G | G | G |
| Llama ehrlichia (4) | A | A | A | G | G |
| E. equi (Atempo) | A | G | A | C | G |
| E. equi (Alice) | A | A | A | G | G |
| E. equi (Meretricious) | G | A | A | G | G |
a
Strains were obtained from three horses (Atempo, Alice, and Meretricious) following experimental transmission from naturally infected I. pacificus ticks collected in northern California.
b
Numbers refer to positions in the 16S rRNA gene of the HGE agent (GenBank accession no. UO2521); the amplified 16S rRNA fragment corresponds to positions 45 through 970 of the HGE agent. Nucleotide differences are underlined.
c
California strain of E. equi (GenBank accession no. M73223).
d
—, deletion at this position.
e
GenBank accession no. M73220.