The pathogenicity of Salmonella mbandaka in specific pathogen free rabbits

Area of Science:

• Veterinary Pathology
• Microbiology
• Immunology

Background:

• Salmonella mbandaka is a rare serotype not commonly associated with rabbit disease.
• Rabbits can harbor Salmonella without showing clinical signs, acting as carriers.
• Experimental procedures can induce stress and immunosuppression in laboratory animals.

Purpose of the Study:

• To investigate the pathogenicity of Salmonella mbandaka in rabbits.
• To determine if immunosuppression and surgical stress exacerbate Salmonella infection.
• To assess the zoonotic potential of Salmonella mbandaka in a laboratory context.

Main Methods:

• Clinically normal rabbits carrying Salmonella mbandaka were used.
• Two groups were established: corticosteroid immunosuppression alone, and immunosuppression with minor surgery.
• Disease development and clinical signs were monitored in both groups.

Main Results:

• Acute or peracute salmonellosis developed in 50% of rabbits receiving only immunosuppression.
• Salmonellosis occurred in 75% of rabbits subjected to immunosuppression and surgery.
• Salmonella mbandaka was isolated from the lungs of affected rabbits.

Conclusions:

• Stressful experimental procedures, particularly combined with immunosuppression, can precipitate clinical salmonellosis in carrier rabbits.
• Salmonella mbandaka demonstrates pathogenicity under specific experimental conditions.
• This serotype should be recognized as a potential zoonotic agent in laboratory environments.