|  | Sham-operated | LPS-treated | ||
---|---|---|---|---|---|
 |  | Ramified microglia | Activated microglia | Ramified microglia | Activated microglia |
3 days after LPS | Mean number | 69 | 0.3 | 15.3 | 162 |
 | % of total | 99.5 | 0.5 | 8.6 | 91.4 |
14 days after LPS | Mean number | 75.3 | 0.3 | 77 | 2.3 |
 | % of total | 99.6 | 0.4 | 97.1 | 2.9 |
1 month after LPS | Mean number | 67 | 0 | 72 | 0 |
 | % of total | 100 | 0 | 100 | 0 |