Table 1 Result interpretation of ELISA for Q fever.

From: First serological evidence of Q fever in large ruminants and its associated risk factors in Punjab, Pakistan

S/P% values*

Interpretation of result

S/P% ≤ 40

Negative

40 < S/P% ≤ 50

Doubtful

50 < S/P% ≤ 80

Positive

S/P% 80 > 80

Strong positive

  1. *The sample (S) to positive (P) was estimated using the following formula: S/P = ((OD Sample − ODNC)/(ODPC − ODNC) × 100).
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