In Taiwan, reports of systematic survey and study about the frequent diarrheas con-tracted by suckling piglets are still lacking. Therefore the occurrence of diarrheas among 3,659 heads of suckling piglets from 381 litters in the 42 farms of the Northern, Cen-tral, Southern and Eastern districts of the whole province was widely surveyed and studied.
The isolation and identification of the microorganisms of Escherichia coli were carried out, the result was that in Taiwan, until! the time weanling, it was considered that the
morbidity of diarrhea caused by Escherichia coli amounted to 76.1 % , Mortality being 28.2 %, and although the ratio was high, compared with the report of England or Den-mark, it was nearly equal. But the rnte of occurrence for neonatal colibacillosis within a week after birth was 56.2 % , Mortality 24.7 % , compared with other reports,especially the report of Japan, the record was high.