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The Hampshire epidemic of foot-and-mouth disease, 1967

Published online by Cambridge University Press:  15 May 2009

R. F. Sellers  and
A. J. Forman
R. F. Sellers
Affiliation:
Animal Virus Research Institute, Pirbright, Working, Surrey
A. J. Forman
Affiliation:
Animal Virus Research Institute, Pirbright, Working, Surrey
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An analysis was made of the spread of foot-and-mouth disease during the epidemic in Hampshire in January and February 1967. To explain the pattern of spread, it had to be postulated that virus was present seven days before the first outbreak was reported. It is suggested that the disease occurred initially in pigs fed on infected meat and that the virus was subsequently disseminated from the local abattoir, where the pigs were killed, to four farms by movement of animals, slaughterhouse waste, people or vehicles, and to fifteen by the airborne route. Subsequent spread from these farms was by movement in two instances and by the airborne route in five. The source and route of infection of the last farm in the outbreak were not determined.

The risk of spread through movement was associated more with carriage of infected slaughterhouse waste, movement of animals, people or vehicles carrying animals than through collection of milk, artificial insemination or movement of other types of vehicles. Outbreaks of disease among pigs gave rise to more secondary spread than outbreaks in cattle. Secondary outbreaks attributed to airborne spread occurred only in ruminants. Most airborne spread was into areas of high livestock density and cattle in the larger herds became infected. Airborne spread could be correlated with wind direction and speed but not with rain. The reduction in the number of outbreaks at the end of the epidemic could be attributed to the elimination of the largest sources of virus, the control of movements and the fact that in all instances except two the wind was blowing virus over towns and out to sea, to areas of low stock density and to areas where animals had been killed.

Type
Research Article
Information
Journal of Hygiene , Volume 71 , Issue 1 , March 1973 , pp. 15 - 34
Copyright
Copyright © Cambridge University Press 1973

References

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