Ocular disease resulting from infection with Rift Valley fever virus

Area of Science:

• Ophthalmology
• Infectious Diseases
• Virology

Background:

• The 1977 Rift Valley fever (RVF) epidemic in Egypt presented an opportunity to investigate associated ocular manifestations.
• Understanding the link between RVF virus and retinal pathology is crucial for patient management and public health.

Observation:

• Two cases of retinitis during the RVF epidemic were analyzed using paired acute and convalescent sera.
• Retinal examination revealed characteristic lesions including macular, paramacular, and extramacular exudates, accompanied by hemorrhage and edema.
• Color photography documented the observed retinal pathologies.

Findings:

• Serological conversion confirmed Rift Valley fever virus as the causative agent for the observed retinitis.
• The documented retinal lesions, including exudates and edema, represent common findings in RVF-associated ocular disease.
• One patient experienced persistent central vision impairment six months post-infection.

Implications:

• This study establishes RVF virus as a cause of retinitis, highlighting the importance of considering infectious etiologies in ophthalmology.
• The findings underscore the potential for significant visual morbidity following RVF infection.
• Further research into RVF's ocular impact can inform diagnostic and therapeutic strategies for affected populations.