Adjunctive use of a neodymium:yttrium-aluminum garnet laser for treatment of pythiosis granulomas in two horses.

The research article describes the treatment of pythiosis granulomas, a common skin disease in horses, using a neodymium:yttrium-aluminum-garnet (Nd:YAG) laser in addition to traditional surgical removal methods. The study findings suggest this combined approach effectively prevents disease recurrence.

Background on Pythiosis in Horses

• Pythiosis is a prevalent granulomatous skin disease in horses, caused by the organism Pythium insidiosum. This disease often necessitates surgical intervention to remove the affected tissue.
• The challenge associated with this disease is the high recurrence rate, even after surgical removal of the granulomas.

Use of the Nd:YAG Laser in Treatment

• The research revolves around treating pythiosis in two horses through a procedure called photoablation. This process involves using the Nd:YAG laser to destroy the bed of the surgically removed granulomas.
• The role of the laser in this process is to generate thermal necrosis — heat-induced tissue death. This can eradicate the Pythium insidiosum organisms that have potentially spread to the surrounding tissues.

Results and Implications

• The result of this combined treatment strategy was promising, as neither of the two horses showed signs of the disease’s recurrence one year after the surgery.
• These findings present the adjunctive use of the Nd:YAG laser following surgical removal as an effective approach to pythiosis treatment with reduced risk of recurrence. The research points to the potential for lasers to contribute to improved treatment approaches in veterinary medicine.