Abstract
SUMMARY The isolation in tissue culture of a virus (V 13) from the faeces of a pig is reported. In a growth curve experiment in monolayer cultures of swine kidney cells this virus reached a maximum titre of 104·7 TCID50 per ml. 78 hours after inoculation. The characteristic cytopathic changes were contraction of the cytoplasm and the formation of cytoplasmic protrusions. The size of the virus, as determined by filtration, was between 35mµ. and 40mµ. The virus was immunologically distinct from the T 80 strain of polio-encephalomyelitis virus. No distinct clinical disease was produced in experimental pigs by V 13, but the virus was recovered from the faeces of pigs following oral inoculation. This virus may therefore be an ECSO virus.
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