Days after infection

Total number of macrophages (CD68+)

Number of alternatively activated macrophages (M2) (arginase+)

Number of classically activated macrophages (M1) (iNOS+)

Number of type II pneumocytes (SP-A+)

1

44.5 ± 0.98^a

17.9 ± 1.82^a

21.5 ± 1.7

23.1 ± 1.61^a

3

52.8 ± 1.36^ab

17.5 ± 1.35^a

26.1 ± 1.5

26.2 ± 1.39^a

6

39.2 ± 1.2^ab

11.6 ± 1.45^ab

18.2 ± 1.4

21.3 ± 0.93^ab

10

38.5 ± 1.84^a

7.8 ± 0.89^ab

21.2 ± 0.9

22.6 ± 0.95^a

14

38.3 ± 1.01^a

7.7 ± 0.60^a

15.5 ± 2.4

18.9 ± 1.24^ab

21

38.1 ± 1.52^a

9.4 ± 1.56^a

19.9 ± 1

26.1 ± 0.89^ab

30

39.9 ± 1.08^ab

13.1 ± 1.62^ab

24.8 ± 1.7

24.6 ± 1.33^a

control

10.1 ± 0.96

1.3 ± 0.34

3.64 ± 0.4

4.8 ± 0.65