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Genetic diversity of echovirus 30 during a meningitis outbreak, demonstrated by direct molecular typing from cerebrospinal fluid
Author(s) -
Bailly JeanLuc,
Brosson Damien,
Archimbaud Christine,
Chambon Martine,
Henquell Cécile,
PeigueLafeuille Hélène
Publication year - 2002
Publication title -
journal of medical virology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 121
eISSN - 1096-9071
pISSN - 0146-6615
DOI - 10.1002/jmv.10235
Subject(s) - echovirus , virology , enterovirus , biology , virus , viral meningitis , coxsackievirus , meningitis , outbreak , serotype , typing , phylogenetic tree , genetics , medicine , gene , cerebrospinal fluid , bacterial meningitis , neuroscience , psychiatry
Echovirus 30 is one of the enterovirus serotypes isolated most frequently in meningitis cases. The genetic diversity of echovirus 30 was investigated in patients hospitalised during an outbreak in 2000 in Clermont‐Ferrand, France. A nested reverse transcription‐PCR (RT‐PCR) assay was developed for qualitative analysis of the echovirus 30 VP1 encoding sequence directly from cerebrospinal fluid. The viral sequences obtained for 22 patients were compared with those of virus isolates obtained from nine patients with echovirus 30 meningitis admitted to hospital in 1996–1997 and with echovirus 30 sequences from international databases. In 2000, meningitis cases were caused by two virus variants (C3 and C4) distinct genetically from the other two variants (C1 and C2) identified during the period 1996–1997. A detailed phylogenetic analysis established that the C1, C2, and C3 variants had close relatives among viruses previously identified in other geographical areas. The C4 variant had not been described earlier. The genomic differences observed between the four echovirus 30 variants arose at synonymous sites indicating that the viruses shared similar antigenic sites in the VP1 encoding sequence. Overall, these observations suggest wide circulation of different echovirus 30 variants and periodic importation of new viruses. The apparent displacement observed between virus variants did not result from a selective advantage caused by antigenic variation. J. Med. Virol. 68:558–567, 2002. © 2002 Wiley‐Liss, Inc.