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Table 2 Main parameters used in the bio-economic herd model. The indices i and b refer to the age-sex cattle class (calf, heifer, young male, cow, adult bull and adult ox) and breed respectively

From: Integrated cost-benefit analysis of tsetse control and herd productivity to inform control programs for animal African trypanosomiasis

Category Notation Parameter
Production m b Milk yield for breed b (kg per lactation)
l b Lactation length in breed b (days)
c b Annual calving rate in breed b
w i,b Live-weight of animals in class i and breed b, (kg)
Herd management o i Annual offtake rate of animals in class i
D Draught yield of oxen (days per year)
V Proportion of AAT deaths salvaged
Impact of AAT on productivity r l % reduction of milk production in animals affected by AAT
r f % reduction in fertility in animals affected by AAT
r w % reduction in live-weight in animals affected by AAT
r d % reduction in draught power in animals affected by AAT
Incidence and mortality T Proportion of AAT cases successfully treated
δ s Duration of symptoms when treatment succeeds, in days
δ f Duration of symptoms when treatment fails (days)
f i Fatality rate of AAT when treatment fails in animals of class i
μ i Baseline mortality in animals of class i, i.e. when AAT incidence = 0