The International Collating Centre, Newmarket, United Kingdom, and other sources reported the following equine disease outbreaks in the second quarter of 2018.

The Republic of South Africa (RSA) reported outbreaks of African horse sickness in most provinces in the country with the exception of the Western Cape. One outbreak was recorded in Swaziland.

Argentina, the United Kingdom, Uruguay, and the United States reported outbreaks of equine influenza. At least 42 cases were confirmed on 10 premises located in five provinces in Argentina. Three-year-old horses were principally affected. The strain involved belonged to clade 1, Florida sublineage of H3N8 virus. The United Kingdom and Uruguay recorded single outbreaks of the disease. Equine influenza was reported as endemic in the United States, occurring in four states, with multiple outbreaks in one state.

Germany, Ireland, Switzerland, the United Kingdom, and the United States recorded strangles. The number of outbreaks included six in Germany, outbreaks in all four provinces in Ireland and eight in Switzerland. The United Kingdom and the United States stated that the disease was endemic in their respective countries. More than 85 outbreaks involving 178 cases were recorded in 24 states in the United