Septic choroiditis with serous retinal detachment in Streptococcus mutans-injected dogs

Area of Science:

• Ophthalmology
• Veterinary Medicine
• Infectious Diseases

Background:

• Multifocal choroiditis is an inflammatory eye condition affecting vision.
• Developing reliable animal models is crucial for understanding disease mechanisms and testing therapies.
• Streptococcus mutans is a bacterium commonly associated with dental caries but can cause systemic infections.

Purpose of the Study:

• To establish and characterize a novel canine model of multifocal choroiditis.
• To investigate the pathological changes induced by Streptococcus mutans in the canine retina and choroid.
• To provide a platform for future research into treatments for choroiditis.

Main Methods:

• A dog model was created via carotid artery injection of Streptococcus mutans.
• Ophthalmic examinations were performed to assess fundus lesions.
• Histopathological analysis was conducted on affected ocular tissues.

Main Results:

• Multifocal choroiditis with serous retinal detachment was successfully induced.
• Fundus lesions were predominantly observed in the tapetal area of the retina.
• Histopathology revealed microabscess formation in the choroid and subretinal space.

Conclusions:

• The described dog model effectively replicates key features of multifocal choroiditis.
• Streptococcus mutans can induce significant ocular pathology, including retinal detachment.
• This model serves as a valuable tool for studying Streptococcus mutans-induced ocular inflammation.