Table 3.

Osteomyelitis scoring system—histology

Morphological abnormality	Histological staining	Score (per abnormality)
Cortical thickening	Masson-Goldner	0: absent
Presence of micro-abscesses		1: mild to moderate
Enlarged Haversian canals		2: moderate to severe
Periosteal elevation	Fluorescent calcium indicators
Gram stain	Modified Gram stain	0: negative
		2: positive

Total histological score and osteomyelitis grade: 0–3, no osteomyelitis; >3–5, mild; >5–7, moderate; >7–10, severe.