<b>Hidden menace: Understanding the devastating consequences of dourine disease in horses</b>

<i>Trypanosoma equiperdum</i> is a protozoan parasite that causes the sexually transmitted disease known as "dourine" in horses. This chronic illness is directly spread from one animal to another during mating. Doflein proposed the name <i>T. equiperdum</i> in 1901. Despite being distributed worldwide, the broad use of artificial insemination technology over the past three decades has resulted in only a few cases being documented. The condition is typically fatal and is characterized by gradual emaciation, nervous system involvement, and edematous lesions of the genitals. The incubation period between exposure and the onset of clinical symptoms varies widely, ranging from a few weeks to several years. The diagnosis of dourine can be challenging because of factors such as a lack of knowledge about the parasite and host-parasite interactions following infection. However, in reality, the diagnosis is based on clinical evidence backed by molecular and serological testing. Coital exanthema, surra, infectious anemia in horses, viral arthritis in horses, and purulent endometritis cause such infectious equine metritis are examples of differential diagnosis. Coital exanthema, surra, equine infectious anemia, viral arthritis, and purulent endometritis are examples of conditions that should be considered in the differential diagnosis of infectious equine metritis. Dourine is the only trypanosomiasis that is not spread by an insect vector. Treatment is generally not advised in dourine-free areas due to the possibility of asymptomatic carrier animals and the concern that treated animals may continue to spread the disease. Dourine vaccination does not yet exist. Thus, preventing dourine is dependent on achieving an infection-free status, which is accomplished by checking the blood for <i>T. equiperdum</i> antibodies.