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Research, Policy and Practice

Table 2 PPR disease parameters, age structure, weight and sale value of sheep and goats in Turkana County 2010

From: Economic losses associated with Peste des petits ruminants in Turkana County Kenya

  Median (10th and 90th percentiles)
Parameter for the sheep New born lambs ( imethek ) Older lambs ( nanyang ) Middle age sheep ( amethek nakale ) Adult sheep ( amethek naapolon )
G y…a = age structure sheep median proportion (%) 15.84 (8.27, 22.40) 20.79 (13.83, 28.34) 24.00 (17.83, 34.63) 37.37 (28.01, 50.20)
W y…a = average live weight per age group 2.5 4.5 10 30
C y…a = TLU value for each age group sheep (US$) 1.5 2.7 6.0 18.0
H y…a = relative mortality due to PPR in the age groups 17.00 (5.40, 31.00) 17.00 (6.45, 34.90) 16.00 (7.33, 37.15) 20.00 (7.80, 34.90)
I y…a = relative incidence of PPR in the age groups 20.00 (7.00, 38.00) 20.00 (10.00, 40.36) 19.00 (9.87, 40.03) 25.00 (11.40, 40.78)
I af = relative incidence of PPR in the lactating groups     25.00 (11.40, 40.78)
Parameters for the goats Newborn kids ( ikale ) Older kids ( namenaoei ) Middle age goats ( akale ) Adult goats ( akine )
G y…a = age structure goat median proportion (%) 18.75 (12.00, 24.44) 20.2 (14.77, 29.96) 21 (17.46, 27.06) 38 (25.24, 53.20)
W y…a = average live weight per age group 2.5 5 12.5 35
C y…a = TLU value for each age group goat (US$) 1.5 3.0 7.5 21.0
H y…a = relative mortality due to PPR in the age groups 14.21 (6.05, 28.56) 17.00 (5.50, 25.5) 16.32 (6.50, 26.5) 16.66 (7.45, 35.00)
I y…a = relative incidence of PPR in the age groups 17.79 (8.50, 32.13) 20.47 (8.43, 31.00) 20.00 (9.50, 30.00) 20.88 (10.41, 36.00)
I af = relative incidence of PPR in the lactating groups     20.88 (10.41, 36.00)