Table 3. Classification of parasitemia according to Ct values of Plasmodium vivax malaria patients in the Republic of Korea (2024–2025).
| Category | Class Ⅰ | Class Ⅱ | Class Ⅲ | Class Ⅳ | Class Ⅴ | Class Ⅵ | Mean | |
|---|---|---|---|---|---|---|---|---|
| Real-time PCR Ct value |
32.9≤Ct<37 | 32.2≤Ct<32.9 | 30≤Ct<32.2 | 28≤Ct<30 | 25≤Ct≤28 | Ct<25 | 25.8 | |
| 25.6 | ||||||||
| Parasitemia (parasites/µl; P) |
P<300 | 300≤P<500 | 500≤P<2,000 | 2,000≤P<8,000 | 8,000≤P≤50,000 | 50,000<P | 72,870 | |
| 80,433 | ||||||||
| Sample number | 2024 | 3 | 3 | 23 | 60 | 273 | 247 | - |
| 2025 | 1 | 1 | 13 | 36 | 257 | 225 | - | |
| Interval (days; date of onset–date of diagnosis) |
2024 | 15.6±18.0 | 1.0±1.4 | 6.7±12.5 | 5.4±4.4 | 7.0±6.8 | 7.2±6.9 | 6.9±7.0 |
| 2025 | 0 | 0.3±0.5 | 5.4±5.3 | 5.1±7.6 | 5.1±7.9 | 3.9±4.4 | 4.5±6.2 | |
PCR=polymerase chain reaction; Ct=cycle threshold.