The Agricultural and Livestock Service (SAG) in Chile has conducted a mass sampling at the Santiago Equestrian Club following an outbreak of equine infectious anemia (EIA) in 16 horses. Around 1,800 horses at the club are being quarantined with movement restricted, while owners have been urged to adopt basic biosafety measures and report any symptoms of the disease. SAG is still investigating the source of the outbreak and has increased surveillance across Chile to prevent the spread of EIA.