Exudative epidermitis of piglets caused by non-toxigenic Staphylococcus sciuri

Area of Science:

• Veterinary Microbiology
• Animal Pathology
• Bacterial Pathogenesis

Background:

• Staphylococcus sciuri infections are a growing concern for animal and public health.
• The pathogenic potential of S. sciuri, particularly in young animals, requires further investigation.
• Exudative epidermitis is a significant disease in piglets, with causative agents needing clear identification.

Purpose of the Study:

• To identify and confirm Staphylococcus sciuri as the causative agent of an exudative epidermitis outbreak in piglets.
• To evaluate the pathogenicity of the isolated S. sciuri strain NJ1306 in experimental animal models.
• To document novel clinical manifestations of S. sciuri infection in piglets.

Main Methods:

• Isolation and identification of S. sciuri from piglets with exudative epidermitis.
• Experimental infection of 5-day-old piglets with S. sciuri strain NJ1306.
• Intraperitoneal injection of BALB/c mice with S. sciuri strain NJ1306 to assess acute toxicity.

Main Results:

• S. sciuri strain NJ1306 successfully induced exudative epidermitis in experimentally infected piglets.
• The isolate caused sudden death in BALB/c mice at a dose of 5×10^8 CFU.
• The study documented, for the first time, clinical lung lesions and endocarditis in piglets caused by S. sciuri.

Conclusions:

• Staphylococcus sciuri strain NJ1306 is confirmed as a pathogen capable of causing exudative epidermitis in piglets.
• S. sciuri strain NJ1306 exhibits pathogenicity in both porcine and murine models.
• This research provides the first evidence of S. sciuri causing lung lesions and endocarditis in piglets, highlighting its broader pathogenic potential.