Figure: 4 TAC §35.81(c)(2)

Interpretation of standard plate agglutination (SPT) test results

Test Results

Test Interpretation

1:50

1:100

1:200

  

-

-

-

Negative

I

I

-

Suspect

+

I

-

Suspect

+

+

+/-

Reactor

Key: - = no agglutination; I = incomplete agglutination; + = complete agglutination