Data from the same 138 New York dairy farms for the years 1994 through 1997 were used to estimate whether Bovine Somatotropin (bST) generated profits for adopters. Data from these same farms from 1993 were used to sort farms into groups by production per cow, profit per cow, and farm size, in order to test bST response by these delineators. Statistically, farms that used bST on average experien...

Impressive progress has been made during the past 15 years in our understanding of the biology of somatotropin (ST) in domestic animals. In part, this progress was sparked by advances in biotechnology that made feasible the production of large quantities of recombinant bovine ST (bST) and porcine ST (pST). The availability of recombinant bST and pST resulted in an exponential increase in invest...

Accession Number. U15731. Species. Bos taurus. Origin of Clone. Hybridizing with a 220-bp cDNA of the somatotropin receptor (Hauser et al., 1990) 10 clones were identified from a bovine genomic library (EMBL3 SP6pT7 cloning vector; Clontech Laboratories, Palo Alto, CA). A 2.9-kb XhoIIAatII fragment containing the promoter and exon I was subcloned into pGEM-7Zf (Promega, Madison, WI), and both s...

This manuscript presents the results of a review of the effects of recombinant bovine somatotropin (rBST) on dairy cattle health, reproductive performance, and culling, that was carried out by an expert panel established by the Canadian Veterinary Medical Association (CVMA). The panel was established by the CVMA in response to a request from Health Canada in 1998 and their report was made publi...