Table 1 Infection indeces

4 h after infection

252 ± 50

396 ± 50*

552 ± 50*

319 ± 25

399 ± 30*

475 ± 50*

24 h after infection

110 ± 50

300 ± 50*

275 ± 50*

115 ± 25

247 ± 20*

312 ± 30*

72 h after infection

30 ± 10

60 ± 15*

40 ± 10*

102 ± 10

137 ± 15*

292 ± 20*