The objectives of this study were to assess the efficacy
of an internal teat sealant containing bismuth
subnitrate, sold as Orbeseal and Teatseal (Pfizer Animal
Health, West Ryde, Australia), when used alone
or in the presence of ADCT before or at drying off on
the incidence of the cumulative number of new IMI and
clinical mastitis cases from the time of dry off to 100
to 150 d of lactation, and milk SCC in a period from
calving to the first 3 wk of lactation. The term internal
teat sealant refers to Orbeseal and Teatseal throughout
this paper.