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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].