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. 2013 Aug 14;10:260. doi: 10.1186/1743-422X-10-260

Table 3.

Histological summary of infected six-week-old BALB/c mice euthanized at various time-points post-inoculation

Tissues Days post-infection
3 6 9 12
Brain
 Control
 -
 -
 -
 -
Infected
 1/3+
 3/3++
 3/3#
 3/3++
Heart
 Control
 -
 -
 -
 -
Infected
 -
 -
 -
 -
Lung
 Control
 -
 -
 -
 -
Infected
 -
 -
 -
 -
Liver
 Control
 -
 -
 -
 -
Infected
 -
 -
 1/3++, 2/3#
 -
Spleen
 Control
 -
 -
 -
 -
Infected
 1/3+
 3/3+
 3/3++
 1/3+
Kidney Control
 -
 -
 -
 -
Infected - - 2/3++, 1/3# -

-, none; +, 1–3 focal inflammatory infiltrates, perivascular cuffing and microglial hyperplasia per high power field (HPF); ++, lesions covering 25% of a HPF; #, lesions covering >75% of a HPF.