Emily Abernathy1, Randall R Peairs2, Min-hsin Chen3, Joseph Icenogle4, Hassan Namdari5. 1. Centers for Disease Control and Prevention, Atlanta, GA, USA. Electronic address: efa9@cdc.gov. 2. Northeastern Eye Institute, Scranton, PA, USA. Electronic address: rpeairs@epix.net. 3. Centers for Disease Control and Prevention, Atlanta, GA, USA. Electronic address: zvp8@cdc.gov. 4. Centers for Disease Control and Prevention, Atlanta, GA, USA. Electronic address: jci1@cdc.gov. 5. Clin-Micro Immunology Center, Clarks Summit, PA, USA. Electronic address: hnamdari@clinmicro.com.
Abstract
BACKGROUND: Many cases of Fuchs' uveitis have been associated with persistent rubella virus infection. A 73-year-old male patient with typical Fuchs' Uveitis Syndrome (FUS) first experienced heterochromia of the left eye at the age fourteen, when rubella was endemic in the US. OBJECTIVES: The purposes of this report are to describe the patient's FUS clinical presentations and to characterize the virus detected in the vitreous fluid. STUDY DESIGN: The patient underwent a therapeutic pars plana vitrectomy in May 2013. A real-time RT-PCR assay for rubella virus was performed on the vitreous fluid by Focus Diagnostics. Additional real-time RT-PCR assays for rubella virus detection and RT-PCR assays for generation of templates for sequencing were performed at the Centers for Disease Control and Prevention (CDC). RESULTS: The results from Focus Diagnostics were positive for rubella virus RNA. Real-time RT-PCR assays at CDC were also positive for rubella virus. A rubella virus sequence of 739 nucleotides was determined and phylogenetic analysis showed that the virus was the sole member of a new phylogenetic group when compared to reference virus sequences. CONCLUSIONS: While FUS remains a clinical diagnosis, findings in this case support the association between rubella virus and the disease. Phylogenetic analysis provided evidence that this rubella virus was likely a previously undetected genotype which is no longer circulating. Since the patient had rubella prior to 1955, this sequence is from the earliest rubella virus yet characterized.
BACKGROUND: Many cases of Fuchs' uveitis have been associated with persistent rubella virus infection. A 73-year-old male patient with typical Fuchs' Uveitis Syndrome (FUS) first experienced heterochromia of the left eye at the age fourteen, when rubella was endemic in the US. OBJECTIVES: The purposes of this report are to describe the patient's FUS clinical presentations and to characterize the virus detected in the vitreous fluid. STUDY DESIGN: The patient underwent a therapeutic pars plana vitrectomy in May 2013. A real-time RT-PCR assay for rubella virus was performed on the vitreous fluid by Focus Diagnostics. Additional real-time RT-PCR assays for rubella virus detection and RT-PCR assays for generation of templates for sequencing were performed at the Centers for Disease Control and Prevention (CDC). RESULTS: The results from Focus Diagnostics were positive for rubella virus RNA. Real-time RT-PCR assays at CDC were also positive for rubella virus. A rubella virus sequence of 739 nucleotides was determined and phylogenetic analysis showed that the virus was the sole member of a new phylogenetic group when compared to reference virus sequences. CONCLUSIONS: While FUS remains a clinical diagnosis, findings in this case support the association between rubella virus and the disease. Phylogenetic analysis provided evidence that this rubella virus was likely a previously undetected genotype which is no longer circulating. Since the patient had rubella prior to 1955, this sequence is from the earliest rubella virus yet characterized.
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