Three horses in Wisconsin have tested positive for equine influenza, and one of the three horses has also tested positive for strangles.In Polk County, a 12-year-old Quarter Horse mare was confirmed positive for equine influenza on May 29. Two additional cases are suspected.In Dane County, a 3-year-old Quarter Horse mare tested positive for equine influenza on May 30. Also in Dane County, a 5-year-old Miniature Horse gelding tested positive for both influenza and strangles on June 1.EDCC Health Watch is an Equine Network marketing program that utilizes information from the Equine Disease Communication Center (EDCC) to create and disseminate verified equine disease reports. TheEDCCis an independent nonprofit organization that is supported by industry donations in order to provide open access to infectious disease information.About StranglesStranglesin horses is an infection caused byStreptococcus equisubspeciesequiand spread through direct contact with other equids or contaminated surfaces. Horses that arent showing clinical signs can harbor and spread the bacteria, and recovered horses remain contagious for at least six weeks, with the potential to cause outbreaks long-term.Infected horses can exhibit a variety of clinical signs:FeverSwollen and/or abscessed lymph nodesNasal dischargeCoughing or wheezingMuscle swellingDifficulty swallowingVeterinarians diagnose horses using polymerase chain reaction (PCR) testing with either a nasal swab, wash, or an abscess sample, and they treat most cases based on clinical signs, implementing antibiotics for severe cases. Overuse of antibiotics can prevent an infected horse from developing immunity. Most horses make a full recovery in three to four weeks.A vaccine is available but not always effective. Biosecurity measures of quarantining new horses at a facility and maintaining high standards of hygiene and disinfecting surfaces can helplower the risk of outbreakorcontain one when it occurs.About Equine InfluenzaEquine influenzais a highly contagious respiratory disease that infects horses, ponies, and other equids, such as donkeys, mules, and zebras. The virus that causes it is spread via saliva and respiratory secretions from infected horses. Horses are commonly exposed via horse-to-horse contact; aerosol transmission from coughing and sneezing; and contact with humans contaminated hands, shoes, or clothes or contaminated tack, buckets, or other equipment.Clinical signs of equine influenza infection can include a high fever (up to 106F); a dry, hacking cough; depression; weakness; anorexia; serous (watery) nasal discharge; and slightly enlarged lymph nodes. Consider monitoring your horses health at shows by taking his temperature daily, which can help you pick up on signs of infection early and take appropriate measures to reduce disease spread.Vaccinationis an important and inexpensive way to protect your horse. US Equestrian requires proof that horses have had an equine influenza vaccination within the six months prior to attending organization-sanctioned competitions or events. Your veterinarian can help you determine what other vaccines your horse might benefit from.In addition to vaccinating, following strictbiosecurity protocolscan help reduce your horses chance of infection and disease. Such measures include quarantining new equine arrivals at barns, disinfecting buckets and equipment, and preventing nose-to-nose contact between horses.