From: Pneumocystis murina colonization in immunocompetent surfactant protein A deficient mice following environmental exposure
Weeks of Age
# infected mice
# of mice per group
% infected
2–4
6
14
42.9
4–6
4
16
25.0
6–8
12
18
66.7
8–10
100.0
12–14
10
40.0
16–18
0
5
0.0