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Table 5 Values used to calculate the cost of prophylaxis and therapy in layer and layer-breeder chickens

From: Re-calculating the cost of coccidiosis in chickens

  UK-1995a Brazil Egypt Guatemala India New Zealand Nigeria UK USA
9. Cost prophylaxis during rearing of replacement layers
 Number layer chickens (millions)b 32.0 329.0 34.2 20.1 382.7 3.7 111.4 53.5 365.3
 % Reared in cages 60 70 65 10 80 50 10 48 50
 % Reared on litter or ground (barn, free-range) 40 30 35 90 20 50 90 52 50
 Vaccine (layer) pence per dose ni 1.3 1.15 0.49 3 9.6 4.2 8 0.49
 Feed consumed during step-down (Kg, weeks 0–3)c 0.36 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40
 Feed consumed during step-down (Kg, weeks 4–6)c 0.74 0.71 0.71 0.71 0.71 0.71 0.71 0.71 0.71
 Feed consumed during step-down (Kg, weeks 7–12)c 2.00 2.22 2.22 2.22 2.22 2.22 2.22 2.22 2.22
 % Reared fed drugs ni 30 5 5 90 5 95 5 5
 % Reared vaccinated ni 70 95 95 10 95 5 95 95
 Total cost of layer replacement prophylaxis (millions) £0.11 £3.87 £0.38 £0.10 £2.53 £0.34 £1.15 £4.09 £1.82
10. Cost prophylaxis for layer breeders
 % Layer flock as breedersd 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21
 Vaccine (breeder) pence per dose ni 1.3 1.15 0.49 3 9.6 4.2 8 0.49
 % Layer breeders on drugs ni 10 0 0 50 0 90 0 0
 % Layer breeders vaccinated ni 90 100 100 50 100 10 100 100
Total cost of layer breeder prophylaxis (millions) £0.003 £0.05 £0.005 £0.001 £0.11 £0.004 £0.02 £0.05 £0.02
11. Cost of treating layer replacements during rearing
 % Flocks affected by coccidiosis 5 5 10 80 5 80 15 4 5
 Pence total cost of treatment 1.9 2.9 4.32 7.19 1.2 19.2 4.7 2.0 2.5
 Total cost of layer replacement therapy (millions) £0.01 £0.14 £0.05 £0.92 £0.05 £0.28 £0.71 £0.02 £0.23
12. Cost of treating layer breeders during rearing
 % Flocks affected by coccidiosis 5 5 10 80 5 80 15 4 5
 Pence total cost of treatment 1.9 2.9 4.32 7.19 1.2 19.2 4.7 2.0 2.5
 Total cost of layer breeder therapy (millions) £0.0004 £0.006 £0.002 £0.01 £0.003 £0.007 £0.009 £0.0005 £0.005
  1. Data collected from major poultry producing countries selected to represent South, Central and North America (Brazil, Guatemala, USA), North Africa (Egypt), sub-Saharan Africa (Nigeria), Asia (India), Europe (UK) and Oceania (New Zealand). Rows shown in italics represent new data related to anticoccidial vaccine use that were not included (ni) in the original model. aFigures from the UK in 1995 used in the original study published by Williams [16]. bFigures downloaded from FAOSTAT for the year 2016 (2020). cFigures taken from the Hy-Line commercial layer management guide (Hy-Line, 2016a). dFigures not available; replaced with those from Williams [16].