Table 2. Detection of M. tuberculosis complex from lymph node aspirates using culture methods and Xpert MTB/RIF assay, northern Ethiopia.
| No. with indicated results by | ||||||||
|---|---|---|---|---|---|---|---|---|
|
Conventional methods* |
Xpert MTB/RIF assay
|
|||||||
| Result | B N (%) | L-J N (%) | G N (%) | L-J +G N (%) | L-J +G+B N(%) | Pos N (%) | NegN(%) | InvN(%) |
| Positive | 226(51.7) | 124(28.4) | 96(21.9) | 135(30.9)a | 226(51.7)a | - | - | - |
| Negative | 200(45.8) | 310(70.9) | 337(77.1) | 298(68.2)b | 200(45.8)b | 61(30.5) | 132(66.0) | 7(3.5) |
| Contamination | 11(2.5) | 3(0.6) | 4(0.9) | 4(0.9)c | 11(2.5)c | - | - | - |
| Total | 437 | 437 | 437 | 437 | 437 | 61 | 132 | 7 |
*Significant differences (P< 0.0001): BacT/Alert3D vs. L-J medium, BacT/Alert3D vs. Gottsacker medium , BacT/Alert 3D vs. L-J plus Gottsacker media, L-J medium vs. Gottsacker medium, L-J vs. L-J plus Gottsacker media, Gottsacker medium vs. L-J plus Gottsacker media, a at least one positive, b all negative, c at least one contaminated, B, BacT/AlerT 3D system , L-J, Lowenstein Jensen, G, Gottsacker, Pos, positive, Neg, negative, Inv,invalid, N= number,