of horizontal plume spread is at most linear with distance from the source (Venkatram and Wyngaard, 1988).

The uncertainty in the NAADSM airborne spread model suggests the need to conduct sensitivity analyses to examine the effects of both model formulation and parameter values on FMDv spread and hence on the economic impact of FMDv release from the NBAF. A sensitivity analysis should have been included in the uSSRA, as it would also indicate the role of airborne spread relative to other modes of spread.

REFERENCES

Garner, M.G., and R.M. Cannon. 1995. Potential for windborne spread of foot-and-mouth disease virus in Australia. A report prepared for the Australian Meat Research Corporation, Bureau of Resource Sciences: Canberra, Australia. 88 pp.

Kohonen, T. 1982. Self-organized formation of topologically correct feature maps. Biol Cybern 43:59-69.

Sørensen, J.H., D.K.J. Mackay, C.Ø. Jensen, and A.I. Donaldson. 2000. An integrated model to predict the atmospheric spread of foot-and-mouth disease virus. Epidemiol Infect 124(3):577-590.

Venkatram, A., and J. Wyngaard (Editors). 1988. Lectures on Air Pollution Modeling. Boston: American Meteorological Society. 390 pp.



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