Epidemiological surveillance and economic impact analysis of different porcine reproductive and respiratory syndrome virus infection statuses in 23 breeding pig farms in Hubei, China

Table 4 Distribution of production efficiency among breeding pig farms with different PRRSV infection statuses

Parameter/scenario	PRRSV provisional negative farm	PRRSV-positive stable farm	PRRSV-positive unstable farm	Reference
Price of weaned piglet (¥/kg)^a	Triangular (23.25, 23.25 and 96.96)	Triangular (23.25, 23.25 and 96.96)	Triangular (23.25, 23.25 and 96.96)	Data distribution fitting
Weaned piglets/mated female/year	PERT (5.38, 26.12, 42 and 63)	PERT (1.13, 27.90 and 40.36)	Kumaraswamy (6.26, 4.97, −13.78 and 38.26)	Data distribution fitting
Average weaned weight (kg)	PERT (3.00, 6.73 and 6.84)	Kumaraswamy (6.48, 22.15, 3.86 and 8.52)	Triangular (4.98, 7 and 7.51)	Data distribution fitting
Full cost of weaned piglet (¥/head)	Triangular (302.26, 423.03 and 572.96)	PERT (246.00, 358.24 and 1056.50)	PERT (271.67, 297.73 and 1811)	Data distribution fitting
Higher price (¥/PRRSV-negative weaned piglet)	PERT (20, 100 and 300)	/	/	expert opinion

^aData are collected from the Ministry of Agriculture and Rural Affairs of the People’s Republic of China from January 2021 to December 2023. Note: PRRSV, Porcine reproductive and respiratory syndrome virus; PERT (minimum, most likely value, maximum); Triangular (minimum, most likely value, maximum); Kumaraswamy distribution (shape parameters α₁ and α₂, minimum, maximum)