Sporadic worldwide “clusters” of feed driven Zilpaterol identifications in racing horses: a review and analysis

Table 1 Feed related clusters of equine zilpaterol identifications

Year	Country	Horses	Detection	Control Authority	Lab	Horse Feed	Penalty
March April 2013	USA California	48	Post-Race	California CHRB	University of California, Davis	1- US Brands	No Trainer Penalties
June 2013	Hong Kong	80 plus	Pre-Race	Hong Kong Jockey Club (HJKC)	HKJC Lab	2 US Brands	No Trainer Penalties
2019	Mauritius	24	Out of Competition	Mauritius Turf Club	QuantiLAB	South African	No Trainer Penalties
2020	France	18	Post-Race	France Galop, Le Trot	LCH France	Irish	No Trainer Penalties
July 2021	Republic of South Africa	10	Post-Race	National Horse- racing Authority (NHA)	National Horse-racing Authority	South African	1 Trainer guilty, 7 trainers retained counsel

Feedstuff related clusters of Zilpaterol identifications, 2013→2021, Dates of events, Jurisdiction, Number of cases reported, Pattern of testing, Authority, Laboratory, Source of Feed and Penalties. In Hong Kong 16 horses were initially identified but there were suggestions that at least 80 more horses had been exposed. In the 2020 events 18 horses were withdrawn from racing in England and France because of exposure to Zilpaterol containing horse feed

ISSN: 2046-0481