Selected article for: "SIR model and transmission parameter"
Author: Romagosa, Anna; Allerson, Matt; Gramer, Marie; Joo, Han Soo; Deen, John; Detmer, Susan; Torremorell, Montserrat
Title: Vaccination of influenza a virus decreases transmission rates in pigs
  • Document date: 2011_12_20
    • ID: 0q8fedqf_40
    Snippet: The infection status of susceptible (S), infectious (I), and recovered/removed (r), was determined on a daily basis for all pigs. Transition of pigs from the S state to I state, and from I state to r state was described by a deterministic SIR model [44] . For each time interval Δt (the interval between two consecutive samplings (i.e. one day)), a pig was considered I if influenza virus was detected by RT-PCR on nasal swabs, and it was considered.....
    Document: The infection status of susceptible (S), infectious (I), and recovered/removed (r), was determined on a daily basis for all pigs. Transition of pigs from the S state to I state, and from I state to r state was described by a deterministic SIR model [44] . For each time interval Δt (the interval between two consecutive samplings (i.e. one day)), a pig was considered I if influenza virus was detected by RT-PCR on nasal swabs, and it was considered S if influenza virus was not detected positive by RT-PCR. When transmission occurred in a pen, S pigs decreased by one (S-1) whereas the number of I pigs increased by one (I+1). The transition from S to I occurs according to the probability given by γ = β S (t) I (t) Δt, with the infection or transmission parameter β denoting the rate at which a randomly chosen animal had infectious contacts in the interval Δt.

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