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FMD is the most contagious viral disease of animals. The small dose
required to infect, the large amount of virus excreted, and the variety
of routes of infection and routes of excretion all contribute to the extreme
contagiousness of the disease. The incubation period of FMD is usually 2 to 14 days. In some circumstances
longer incubation periods have been recorded, particularly if the infecting
dose is low. The disease is of high morbidity and low mortality - mortality
is only significant when young animals are infected, in which case neonates
may die due to a peracute myocarditis.
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