Group A Streptococcus strains causing meningitis without distinct invasive phenotype
Marquardt, L.; Andreoni, F.; Boumasmoud, M.; Schweizer, T. A.; Heuberger, D.; Parietti, E.; Epprecht, J.; Mattle, D.; Raez, A.; Marques-Maggio, E.; Schuepbach, R.; Hasse, B. K.; Mairpady Shambat, S.; Brugger, S. D.; Zinkernagel, A.
Show abstract
Group A streptococcal (GAS, aka Streptococcus pyogenes) meningitis is a fulminant disease associated with high morbidity and mortality. To elucidate the mechanisms underlying the invasiveness of GAS in meningitis, we compared GAS isolates derived from five cases of meningitis, to otitis and colonizing isolates. We did not observe differences in adherence to and invasion of human brain microvascular endothelial cells, virulence factors activity or barrier disruption. Whole genome sequencing did not reveal particular invasiveness traits. Most patients previously suffered from otitis media suggesting that meningitis likely resulted from a continuous spread of the infection rather than being attributable to changes in pathogens virulence.
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