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Table 4 Calculation of the change in Trichinella spp. biomass in raccoon dogs and red foxes in Estonia

From: Trichinella spp. biomass has increased in raccoon dogs (Nyctereutes procyonoides) and red foxes (Vulpes vulpes) in Estonia

  Raccoon dog Red fox Reference
Hunting bag 1995, n animals 1723 3326 [67]
Hunting bag 2001, n animals 4259 6628 [67]
Hunting bag 2011, n animals 12,577 7144 [13]
With Trichinella larvae (%)
1992–2000 45.5 42.9 [14]
2000–2002 42.0 40.6 [4]
2011–2012 57.5 69.0 Present study
Mean body weight of host, g 4830 4890 [68, 69]
Muscle tissue of body weight, % 60 60 [70]
Median (mean) Trichinella lpg
1992–1996 nd (13.4) nd (43.1) [2]
2000–2002 7.2 (nd) 3.0 (nd) [4]
2011–2012 98.0 (161.1) 8.2 (48.0) Current study
Trichinella biomass 1992–2000, median (mean) n larvae
in 1000 animals nd (17,669,106) nd (54,249,367)  
in the hunting baga nd (30,443,870) nd (180,433,393)  
Trichinella biomass 2000–2002, median (mean) n larvae
in 1000 animals 8,763,552 (nd) 3,573,612 (nd)  
in the hunting bagb 37,323,968 (nd) 23,685,900 (nd)  
Trichinella biomass 2011–2012, median (mean) n larvae
in 1000 animals 163,302,300 (268,448,985) 16,600,572 (97,174,080)  
in the hunting bagc 2,053,853,027 (3,376,282,884) 118,594,486 (694,211,628)  
Increase in Trichinella biomass from 1992 to 2000 to 2011–2012, calculated from median (mean) n larvae
in 1000 animals nd (15.2-fold) nd (1.8-fold)  
in the hunting bag nd (110.9-fold) nd (3.8-fold)  
Increase in Trichinella biomass from 2000 to 2002 to 2011–2012, calculated from median (mean) n larvae
in 1000 animals 18.6-fold (nd) 4.6-fold (nd)  
in the hunting bag 55.0-fold (nd) 5.0-fold (nd)  
  1. Abbreviations: nd, no data; lpg, larvae per gram of muscle tissue
  2. a n larvae = n animals 1995 × % with larvae 1992–2000 × (mean body weight of host, g × muscle tissue of body weight, %) × median (mean) lpg (1992–1996)
  3. b n larvae = n animals 2001 × % with larvae 2000–2002 × (mean body weight of host, g × muscle tissue of body weight, %) × median (mean) lpg (2000–2002)
  4. c n larvae = n animals 2011 × % with larvae 2011–2012 × (mean body weight of host, g × muscle tissue of body weight, %) × median (mean) lpg (2011–2012)