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Table 4 Observed pathologies and their importance factor (w) and percentages (%) in catfish from São Marcos Bay

From: A histopathological and biometric comparison between catfish (Pisces, Ariidae) from a harbor and a protected area, Brazil

Target organ Reaction pattern Alteration* w % S. herzbergii % B. bagre
Liver Inflammatory response Profusion and dilation of blood vessels (L1) 1 A1 = 0/A2 = 93.33 A1 = 43.33/A2 = 66.66
   Presence of melanomacrophages (L2) 1 A1 = 0/A2 = 93.33 A1 = 32.33/A2 = 66.66
  Regressive changes Nuclear pleomorphisms (L3) 2 A1 = 0/A2 = 66.66 A1 = 23.33/A2 = 66.66
   Necrosis (L4) 3 A1 = 0/A2 = 90.00 A1 = 16.66/A2 = 86.66
  Progressive changes Lipidosis (L5) 1 A1 = 0/A2 = 66.66 A1 = 16.66/A2 = 86.66
   Eosinophilic hepatocellular alteration (L6) 2 A1 = 0/A2 = 86.66 A1 = 16.66/A2 = 66.66
   Granulomatous lesions (L7) 2 A1 = 0/A2 = 86.66 A1 = 43.33/A2 = 90.00
   Presence of eosinophilic bodies (L8) 2 A1 = 0/A2 = 90.00 A1 = 66.66/A2 = 86.66
Gills Circulatory disturbances Lamellar capillary aneurism (L9) 1 A1 = 0/A2 = 63.33 A1 = 16.66/A2 = 96.66
  Regressive changes Epithelial lifting (L10) 1 A1 = 0/A2 = 63.33 A1 = 90.00/A2 = 86.66
   Epithelial desquamation (L11) 1 A1 = 0/A2 = 23.33 A1 = 23.33/A2 = 43.33
   Deformation of lamellae (L12) 1 A1 = 0/A2 = 90.00 A1 = 16.66/A2 = 66.66
   Mucous (goblet) cell degeneration (L13) 2 A1 = 0/A2 = 90.00 A1 = 33.33/A2 = 86.00
  Progressive changes Hypertrophy of squamous epithelia (L14) 1 A1 = 0/A2 = 23.33 A1 = 23.33/A2 = 16.66
   Lamellar fusion (L15) 1 A1 = 0/A2 = 93.33 A1 = 43.33/A2 = 93.33
   Epithelial hyperplasia (L16) 2 A1 = 0/A2 = 93.33 A1 = 16.66/A2 = 86.33
  1. A1 = reference; A2 = contaminated area.
  2. *Only persistent pathologies within an organ were scored as observed. Alterations that did not qualify as representative of the overall organ condition were disregarded, being considered as natural variations.