TABLE 1.
Recovery of T. gondii oocysts by the centrifugation method
| g value | % Recovery (avg ± SD)a
|
||
|---|---|---|---|
| Sporulated, fresh oocysts (age, 2 months) | Sporulated, old oocysts (age, 10 months) | Unsporulated oocysts (age, 7 to 8 months) | |
| 1,040 | 46.0 ± 14.1 (3)b | 52.1 ± 2.1 (3) | 62.5 ± 9.3 (3) |
| 1,247 | 59.3 ± 12.0 (4) | 65.1 ± 11.0 (3) | 68.7 ± 6.7 (3) |
| 1,474 | 57.9 ± 19.3 (4) | 73.8 ± 23.9 (3) | 53.8 ± 17.7 (3) |
| 1,719 | 63.2 ± 13.8 (4) | 66.9 ± 26.8 (3) | 73.8 ± 19.3 (3) |
| 1,983 | 66.0 ± 3.2 (3) | 80.6 ± 15.1 (3) | 83.3 ± 5.7 (3) |
| 2,266 | 66.0 ± 10.9 (3) | 82.5 ± 7.5 (3) | 59.9 ± 11.2 (3) |
| 2,568 | 61.6 ± 10.5 (3) | 62.5 ± 4.2 (3) | 89.4 ± 13.0 (3) |
| 2,889 | NDc | ND | 80.7 ± 27.9 (3) |
a
The organism used was strain DX, and the inoculum contained 1 × 105 oocysts in 50 ml of demineralized water.
b
The numbers in parentheses are numbers of replicates.
c
ND, not done.