TABLE 4.

Diagnostic sensitivity and specificity and positive and negative predictive values of Western immunoblotting relative to the E. chaffeensis IFA

Protein(s)	Relative diagnostic sensitivity (%)	Relative diagnostic specificity (%)	Positive predictive value (%)	Negative predictive value (%)
E. chaffeensis 44–110 kDa	92	100	100	87
E. chaffeensis 28 kDa	68	100	100	63
E. canis 44–110 kDa	81	100	100	74
E. canis 30 kDa	68	100	100	63
E. chaffeensis rP28	41	100	100	48
E. canis rP30	92	100	100	87