Even though it has been known for decades, equine adenoitis, popularly called strangles, continues to be one of the main sanitary challenges of horse breeding in Brazil. The high transmission power of the disease and the presence of asymptomatic carriers make control difficult and directly affect the performance and well-being of the animals. In a scenario where Brazil has around 6 million equines, respiratory health is fundamental to guarantee productivity and predictability in management. Caused by the bacterium Streptococcus equi, strangles presents high transmissibility, being able to quickly reach a large part of the susceptible animals. In non-immunized populations, the morbidity rate can approach 100%, favoring outbreaks in collective environments. Symptoms affect performance and recovery of the animals In many cases, there is formation of abscesses and compromise of the respiratory tract, which directly interferes with feeding, recovery, and physical performance of the ...