TABLE 1.
Differences in the ability of influenza virus strains to infect murine Mφ
| Virusa | % of infected cellsb
|
||
|---|---|---|---|
| Peritoneal Mφ | Alveolar Mφ | J774 Mφ cell line | |
| BJx109 | 59 ± 11 | 71 ± 6 | 53 ± 7 |
| HKx31 | 35 ± 7 | 42 ± 9 | 37 ± 12 |
| PR8 | 3 ± 1 | 8 ± 1 | 3 ± 1 |
a
Mφ monolayers in chamber slides were infected for 1 h with 106 PFU of influenza virus. At 8 to 10 h postinfection, cells were stained by immunofluorescence for expression of influenza virus NP.
b
Data represent the mean percent infection ± 1 standard error of the mean from three experiments. MDCK cells infected under the same conditions showed >95% infection by all three viruses.