Scrotal Dermatitis and Its Potential Implications on Male Reproductive Function: A Case Report of Demodicosis with Secondary Bacterial Infection in a Dog

Abstract

Scrotal dermatitis in dogs is often considered a localised dermatological condition; however, it can have significant implications on male reproductive function due to its effect on testicular thermoregulation. This case report describes a 7.5-year-old intact male dog presented with a history of progressive erythema, alopecia and irritation in the scrotal region, accompanied by pruritus and frequent licking. Clinical examination revealed inflamed, thickened, and edematous scrotal skin, while both testes were normal in size, consistency, and position, ruling out primary testicular pathology. Diagnostic evaluation through deep skin scraping confirmed demodicosis, and cytological examination indicated secondary bacterial pyoderma. Haematological findings revealed leukocytosis, supporting an active inflammatory process. Based on these clinical and laboratory findings, the case was diagnosed as scrotal dermatitis associated with demodicosis and secondary bacterial infection. Therapeutic management—including systemic acaricidals, antibiotics, anti-inflammatories, topical therapy, and nutritional support resulted in marked clinical improvement. The case highlights that scrotal dermatitis may impair thermoregulation of the testes and potentially affect spermatogenesis if left untreated. Early diagnosis, prompt therapeutic intervention, and proper management are essential to prevent secondary complications and preserve reproductive function in male dogs.