Table 1 Clinical samples obtained from the CDC to assess the specificity of the xVFA and the corresponding ground truth information

From: Rapid single-tier serodiagnosis of Lyme disease

Sample group

Standard two-tier tests (STTT)

Modified two-tier tests (MTTT)

Diagnosis

IgM/IgG EIA

IgM WB

IgG WB

Zeus VlsE/pepC10 EIA

Zeus WCS EIA

Zeus IgM EIA

Zeus IgG EIA

STTT

MTTT IgM

MTTT IgG

xVFA

Early Lyme-acute

0/4

1/4

0/4

2/4

1/4

1/4

0/4

0/4

1/4

0/4

0/4

Early Lyme- convalescent

4/4

4/4

1/4

4/4

4/4

4/4

1/4

4/4

4/4

1/4

4/4

Late Lyme disease

4/4

2/4

4/4

4/4

4/4

4/4

4/4

4/4

4/4

4/4

4/4

Look-alike diseases

2/12

0/12

0/12

1/12

1/12

1/12

0/12

0/12

0/12

0/12

0/12

Healthy control

2/8

0/8

0/8

0/8

3/8

3/8

0/8

0/8

0/8

0/8

0/8