Pleuropneumonia was induced in goats by inoculation of mycoplasma strain ... SGP1 (F38 type) and spread readily from them to in-contact goats which in turn passed it to other in-contact goats. This emphasises the similarity between the experimentally produced disease and classical contagious caprine pleuropneumonia (CCPP) thus supporting the view that SGP1 has an aetiological role in CCPP in the field.