'Lelystad agent'--the cause of abortus blauw (mystery swine disease)
Wensvoort, G.; Terpstra, C.; Pol, J.M.
Tijdschrift Voor Diergeneeskunde 116(13): 675-676
1991
ISSN/ISBN: 0040-7453 PMID: 1862496 Document Number: 387598
An unidentified agent was isolated from samples of pigs affected with abortus blauw (also known as mystery swine disease). This agent, designated 'Lelystad agent', grows in cultures of pig lung macrophages. The agent was inoculated into eight pregnant sows which subsequently aborted or gave birth to weak or dead piglets. The agent was then isolated from these piglets, thus confirming that it is the causal agent of abortus blauw.