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Table 1 Grading of inflammation of histopathology tissue sections

From: Genotyping and comparative pathology of Spirocerca in black-backed jackals (Canis mesomelas) in South Africa

Grading of inflammation
Severity Duration
Mild ≤400 inflammatory cells in one high power field (400X magnification) Acute Predominance of polymorphonuclear leukocytes (neutrophils and eosinophils), accompanied by prominent inflammatory edema.
Moderate 400–900 inflammatory cells in one high power field (400X magnification) Subacute Polymophonuclear inflammatory infiltrate mixed with mononuclear cells (lymphocytes, macrophages and plasma cells). Edema present, but mild.
Severe >900 inflammatory cells in one high power field (400X magnification) Chronic Large numbers of plasma cells, lymphocytes, macrophages and significantly fewer polymorphonuclear leukocytes, accompanied by small blood vessel proliferation and fibroblasts (granulation tissue).
   Chronic - active Large numbers of plasma cells, lymphocytes, macrophages and polymorphonuclear leukocytes, accompanied by proliferation of small blood vessels and fibroblasts (granulation tissue).