Amitraz poisoning in a cat/Intoxicação por amitraz em um gato

• Published in: Ciência rural 2024-01, Vol.54 (1), p.1
• Main Authors: Santin, Thais Tosetto, Veronezi, Tayná Mayer, de Azevedo, André Fernandes, da Costa, Fernanda Vieira Amorim
• Format: Article
• Language: Portuguese
• Subjects: Anemia; Blood; Care and treatment; Cats; Hyperglycemia; Insecticides; Medical examination; Parasitic diseases; Poisoning
• ISSN: 0103-8478
• DOI: 10.1590/0103-8478cr20220308

A 4-month-old male Himalayan cat presented with clinical signs of acute lethargy and motor incoordination after being treated with amitraz for parasite control. On clinical examination, the patient was lethargic and ataxic with severe pulicosis, hypothermia, pale mucous membranes, bradycardia, weak femoral pulses, hyperglycemia, and bilateral mydriasis. Blood tests revealed non-regenerative hypochromic microcytic anemia. Serum alanine levels were elevated tenfold. The patient received supportive treatment with atipamezole (an [alpha]2-adrenergic antagonist) at a dose of 0.1 mg/kg intramuscularly. After 24 h of hospitalization and constant monitoring, the patient recovered and was discharged. The published literature showed that the active ingredient amitraz is effective in the treatment of some parasitic diseases in cats, such as scabies and demodicosis; therefore, it is still used for this purpose. Given the small therapeutic margin of this insecticide, veterinarians should caution owners about its potential toxicity. This report emphasized the significance of amitraz intoxication in feline species and the success of the treatment, which should be initiated in the first hour after intoxication.