What is the normal range of Tpha?
| CSF abnormalities | Serum TPHA titre | |
|---|---|---|
| CSF WBC count > 5/μl, n (%) | 6 (6) | 19 (39) |
| Median (IQR)a | 7 (7–7) | 20 (11–41) |
| CSF TPHA titre ≥ 1:640, n (%) | 7 (7) | 39 (80) |
| Median (IQR)a | 1:640 (1:640–1:640) | 1:2560 (1:1280–1:10,240) |
How do you read TPHA test results?
how to interpret the tpha test results?
- It is 4+ if there is a uniform mat of the cells covering the entire well.
- It is 3+ if most of the well is covered by a uniform mat of cells.
- A lesser density mat surrounded by a slight ring(+2) is another scenario of a TPHA test positive.
What does Tpha reactive mean?
The possible cause of false reactive TPHA test results is discussed. It was concluded that where reagin and TPHA tests are reactive in a person who has no history or clinical signs of syphilis, the serum should be referred for TPI and FTA-ABS testing.
How accurate is TPHA test?
The positive predictive value (PPV) and negative predictive value (NPV) were 92.3 and 98.9%, respectively. The agreement between TPHA and ELISA tests was nearly perfect with a kappa value of 0.96 (Table 3).
Can TPHA be false positive?
Biological false positive reactions were shown by 26 of the leprosy sera, of which three or 11.5% were also reactive in the TPHA test. A further four sera in the leprosy group were reactive only in the TPHA test. The possible cause of false reactive TPHA test results is discussed.
Can TPHA test wrong?
Can Tpha be false positive?
Will TPHA become negative?
The response of the Treponema Pallidum Haemagglutination Assay (TPHA) to treatment was studied in 61 cases of early infectious syphilis. In none of the 55 cases of early syphilis in which the pre-treatment TPHA was positive did the TPHA test become consistently negative after treatment.
Is TPHA confirmatory for syphilis?
As described, there are two standard screening methods and two alternative confirmatory tests for the laboratory diagnosis of syphilis: VDRL (sensitivity = 86%, specificity = 85%); RPR (sensitivity = 78%, specificity = 85%); TPHA (sensitivity >95%, specificity >99%) and.
Will Tpha become negative after treatment?
Is Tpha confirmatory for syphilis?