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Research, Policy and Practice

Table 4 Calculated production losses associated with PPR in sheep and goats

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

  Losses in US dollars
  Sheep Goat
Mortality   
L d = (G y…a × H y…a × C y…a) × (N/100) 5,972,889 10,368,074
L y = (P f × H a × C y) × (N/100) 211,029 224,717
L = L d+ L y 6,183,919 10,592,791
Milk losses   
M r = (L f × (I afH a) × V l × T r × C m) × (N/100) 22,619 69,000
M y = ((L f + P f) × (I aH a) × (365/K − 365/(K + Q)) V a × T l × C m) × (N/100) 236,188 608,367
M = M d+ M r+ M y 258,807 677,367
Losses due to weight losses   
W d = (G y…a × (I y…aH y…a) × W l × W y…a × C me) × (N/100) 428,312 744,959
W y = ((L f + P f) × (I aH af) × (365/K − 365/K + Q) × B × C me) × (N/100) 41,179 37,003
W = W d+ W y 469,491 781,962
Opportunity cost   
O c = (G y…a × (I y…aH y…a) × (.025*C y…a)) × (N/100) 35,479 63,817
O = O c 35,479 63,817
Total direct economic losses for field herd in Turkana   
T L= L + M + W + O 6,947,696 12,115,938
Combined total loss 19,063,633