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. 2013 Jun 28;8(6):e66054. doi: 10.1371/journal.pone.0066054

Table 1. Definitions of the parameters used in the model.

Definition (units) Parameter Estimate Reference
Number of pigs per pen N 25 [41]
Number of pens on either side of a corridor PensPerSide 20 [41]
Infection rate β Assume 1.67×10−3
The rate at which a pig ceases to remain infectious (day−1) γ 1/26 = 0.03846 [14], [19]
The rate at which a carrier becomes re-infectious (day−1) δ 1/108 = 0.00926
The rate at which a pig ceases to carry the bacteria (day−1) ε 1/60 = 0.01667 [14]
Loss of immunity (day−1) ν 0.5
Shedding rate (cfu day−1) λ 2.25×104 [42], [43]
Proportion of cfu present ingested (day−1): Slatted κ 4.23×10−4 [43], [44]
Solid 3.17×10−5
Bacteria death rate (day−1) l 1/84 = 0.01190 [45]
Probability of infection from bacterial consumption p 2.30×10−6 [19], [46]
Cross infection rate α Assume 1.14×10−6
Proportion of faeces that remains in a room π 0.4
Proportion of faeces that remains present after cleaning q 0.1
Time spent in unit (days) Tmax 108 [26]
Airborne infection rate ω Assume 1.02×10−14

Reproduced from Table 2 of [11].