Volume 10, Number 12—December 2004
Research
H3N2 Influenza Virus Transmission from Swine to Turkeys, United States
Table 1
Replication of turkey isolates and swine influenza viruses in various animalsa
Animal | Isolate |
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---|---|---|---|---|---|---|---|---|
A/Tk/MN/764/03 |
A/Tk/NC/16108/03 |
A/Sw/TX/4199-2/98 |
A/Sw/NC/29974/02 |
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Positive/totalb | log10 EID50c | Positive/totalb | log10 EID50c | Positive/totalb | log10 EID50c | Positive/totalb | log10 EID50c | |
Mouse | 6/6 | 4.3 (0.3) | 6/6 | 4.7 (0.3) | 6/6 | 5.3 (0.3) | 6/6 | 5.0 (0.5) |
Swine | 2/2 | 2.7 (0.3) | 2/2 | 3.3 (0.3) | 2/2 | 3.7 (0.3) | NT | NT |
Turkey | 5/5 | 2.3 (0.3) | 3/4 | 2.3 (0.3) | 0/5 | − | 1/4 | 1.3 (0.0) |
Quail | 5/6 | 3.0 (0.5) | 4/6 | 3.3 (0.5) | 0/6 | − | 0/6 | − |
Chicken | 0/6 | − | 0/6 | − | 0/6 | − | 0/6 | − |
a NT, not tested; −; negative
bNumber of animals with a virus-positive lung homogenate (mice) or nasal swab at 3 days postinfection per number of animals infected.
cAverage log10 EID50 per milliliter of homogenate (standard deviation).