TABLE 1.

Isolates of A. phagocytophilum used in this study and their reactivity to MAbs by IFA

IsolateOriginAntibody reactivity by IFAaLocation
Group AGroup BRabbit PAbs
96HE27 (Webster)Human+++Wisconsin
96HE54 (Spooner)Human+++Wisconsin
97HE97Human+++Wisconsin
E. equi MRKHorse+++California
96HE158 (NY8)Human++New York
MD-HGEHuman++New York
97E13Dog++Minnesota
BDSHumanb+Wisconsin
  • a Group A includes 1D1B12, 1D1D9, 3H5H7 and 3H5H5. Group B includes 5B3B11, 5B3C10, 5B3D8, 5B3G6, 5B3H4, and 5B3H5. PAbs were raised in a rabbit exposed to the A. phagocytophilum Webster strain in our laboratory.

  • b Originally from a human patient, but the agent was purified from horse neutrophils after experimental infection.