Experimental hematogenous endophthalmitis caused by Candida albicans

Area of Science:

• Ophthalmology
• Mycology
• Infectious Diseases

Background:

• Hematogenous endophthalmitis is a serious ocular infection.
• Candida albicans is a common cause of opportunistic fungal infections.
• Establishing reliable animal models is crucial for studying disease pathogenesis and treatment.

Purpose of the Study:

• To develop and validate a rabbit model for hematogenous endophthalmitis caused by Candida albicans.
• To characterize the clinical and pathological features of the induced ocular infection.
• To assess the utility of this model for future research.

Main Methods:

• Intravenous injection of Candida albicans into 80 New Zealand white rabbits.
• Clinical examination of ocular lesions at two weeks post-infection.
• Fungal cultures of ocular tissues and other organs.
• Histopathological analysis of ocular lesions.

Main Results:

• 88% of infected rabbits developed ocular lesions clinically resembling human endophthalmitis.
• Fungal cultures confirmed Candida presence in chorioretina and kidneys, remaining positive for 38 days.
• Positive ocular cultures correlated with systemic fungal dissemination in 95% of cases.
• Ocular lesions presented as focal chorioretinitis with granulomatous and suppurative inflammation.

Conclusions:

• The rabbit model accurately replicates key features of human Candida endophthalmitis.
• This model allows for in-depth study of disease mechanisms and therapeutic interventions.
• The model's high fidelity to human disease makes it suitable for preclinical studies.