Table 3. Overview of histopathological changes observed in the brain and spinal cord of animals infected with DUVV-NL07, RABV-PV or SHBRV-18 virus at the time of paralysis.
DUVV-NL07 | RABV-PV | SHBRV-18 | |
perivascular cuffs (brain) | 1–2 CD3+ | <1 CD3+ | >2 CD3+ |
perivascular cuffs (spinal cord) | 1–2 CD3+ | <1 CD3+ | >2 CD3+ |
Cells infiltrating neuropil | 2–4 CD3+ (cortex) | <1 CD3+ | 2–3 CD3+ (brainstem) |
>2 CD3+ (spinal cord) | 1–2 CD3+ (spinal cord) | 1 CD3+ (spinal cord) | |
astrocytosis | Cerebellum | Cerebrum | Cerebrum |
(GFAP+) | Brainstem | Brainstem | Brainstem |
Perivascular cuffs | Perivascular cuffs | ||
Spinal cord | Spinal cord | Spinal cord | |
microgliosis | Cerebellum | Cerebellum | |
(Iba1+) | Cerebrum | Cerebrum | |
Brainstem | Brainstem | ||
Perivascular cuffs | |||
Spinal cord | Spinal cord | Spinal cord |
Sections were stained with antibodies against rabies virus nucleoprotein, CD3 (T cells) GFAP (activated astrocytes) and Iba1 (activated microglial cells) as described in the materials and methods. Numbers indicate numbers of positive cells per high power field (objective 40×) when complete brain or spinal cord sections were screened.