Volume 23, Number 12—December 2017
Synopsis
Spread of Canine Influenza A(H3N2) Virus, United States
Table 1
Persistence of virus or viral RNA in dogs in 2 separate Chicago-area animal shelters that were infected with canine influenza A(H3N2) virus, United States, April 2015*
1 |
2 |
3 |
4 |
5 |
16 |
|
---|---|---|---|---|---|---|
Shelter 2 | ||||||
1 | Neg | 37.4 | 25.1 | 37.9 | 26 | 29.5† |
5 | NT | NT | 22.7 | 24.6† | NT | NT |
6 | 24.6† | 23.7† | NT | NT | NT | NT |
10 | 36.2 | 39.5 | NT | NT | NT | NT |
11 | NT | NT | NT | NT | 37.1 | NT |
15 | NT | NT | 38.6† | 35.9 | 38.2† | 36 |
19 | NT | NT | Neg | NT | NT | NT |
20 | 37.3 | 37.2 | NT | NT | NT | NT |
23 | NT | NT | Neg | NT | NT | Neg |
24 | Neg | Neg | NT | NT | NT | NT |
28 | Neg | Neg | NT | NT | NT | NT |
*Data from Newbury et al. (33) Table 1, used with permission. Data shown as rRT-PCR Ct values. Values <36 are considered positive results (black cells), and values >37 but <40 are considered weak positive results (dark gray cells). Light gray cells indicate negative rRT-PCR assay results for influenza A virus shedding. Ct, cycle threshold; Neg, negative; NT, not tested; rRT-PCR, real-time reverse transcription PCR.
†Samples for which virus was successfully isolated.