Family foci of enterovirus infection (clinical cases)
Keywords:enterovirus infection, non-polio enteroviruses, intrafamilial focus of infection, ECHO-3, ECHO-6, polymerase chain reaction
AbstractThe article describes two intrafamilial foci of enterovirus infection (EVI), caused by ECHO-3 and ECHO-6 viruses. In the first group, 6 children aged from 3 months to 4 years were found (average age — 18.0 ± 4.3 months), 3 boys (50 %) and 3 girls (50 %) with various clinical manifestations of EVI associated between themselves epidemiologically (siblings of one family, who used water from one draw-well and had close household contact). ECHO-3 virus was detected in the clinical material of the examined children. The second outbreak involved two children from the same family, who simultaneously suffered from aseptic meningitis in 2017. Cerebrospinal fluid of both children was examined by reverse transcription polymerase chain reaction (RT-PCR) (Republican Research and Practical Center for Epidemiology and Microbiology, Minsk), RNA EV was detected in both samples. After RNA sequencing, ECHO 6 was detected in both samples. The verification in both cases was performed by various clinical and laboratory methods (general clinical methods, enzyme-linked immunosorbent assay with detection of antibodies to EV and antigens of EV in feces, RT-PCR with subsequent EV RNA sequencing and determination of virus serotype). In two cases of the disease, the diagnosis of EVI was made epidemiologically without laboratory detection of RNA EV. PCR with the determination of EV RNA in feces and cerebrospinal fluid showed the greatest effectiveness. In the described outbreaks, RNA of enteroviruses was not detected in the blood in any sample.
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