Table 1. Real-time RT-PCR results for the H5 gene in study of highly pathogenic avian influenza virus A(H5N1) infection in cats, South Korea, 2023*.
| Location | ID | Clinical signs | Cycle threshold value |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brain | Feces | Heart | Intestine | Kidney | Liver | Lung | Lymph node | Nasal swab |
Spleen | Trachea | |||
| Yongsan-gu | |||||||||||||
| Shelter 1 |
Cat carcass no. 1 | Death | 33 | 32 | 32 | 27 | 32 | 27 | 21 | 28 | 35 | 26 | 26 |
| Cat carcass no. 2 | Death | 20 | 28 | 21 | 27 | 25 | 15 | 18 | 22 | 27 | 21 | 26 | |
| Cat carcass no. 3 | Death | 28 | 31 | 25 | 27 | 27 | 17 | 19 | 24 | 36 | 25 | 23 | |
| Cats nos. 4–5 |
None |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
NT |
–† |
NT |
NT |
|
| Gwanak-gu | |||||||||||||
| Animal hospital | Cat carcass no. 1 | Death | 22 | 27 | 20 | 19 | 18 | 12 | 15 | 21 | 19 | 17 | 24 |
| Cat no. 1 | Severe | NT | NT | NT | NT | NT | NT | NT | NT | 35 | NT | NT | |
| Cats nos. 2–4 | Moderate | NT | NT | NT | NT | NT | NT | NT | NT | –‡ | NT | NT | |
| Shelter 2 | Cat no. 5 | None | NT | NT | NT | NT | NT | NT | NT | NT | 29 | NT | NT |
| Cat no. 6 | None | NT | NT | NT | NT | NT | NT | NT | NT | 24 | NT | NT | |
| Cats nos. 7–126 | None | NT | NT | NT | NT | NT | NT | NT | NT | –§ | NT | NT | |
*ID, identification number; NT, not tested; RT-PCR, reverse transcription PCR; –, negative. †Two live cats from shelter 1 were negative on H5 real-time RT-PCR but showed seroconversion against H5 antigens. ‡Three cats from the animal hospital were negative on H5 real-time RT-PCR. §At shelter 2, 120 live cats were negative on H5 real-time RT-PCR.