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© Research
Publication : Developmental and comparative immunology

Adult zebrafish model of bacterial meningitis in Streptococcus agalactiae infection

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Developmental and comparative immunology - 04 Aug 2012

Patterson H, Saralahti A, Parikka M, Dramsi S, Trieu-Cuot P, Poyart C, Rounioja S, Rämet M

Link to Pubmed [PMID] – 22867759

Dev. Comp. Immunol. 2012 Nov;38(3):447-55

Streptococcus agalactiae (Group B Streptococcus, GBS) is the major cause of severe bacterial disease and meningitis in newborns. The zebrafish (Danio rerio) has recently emerged as a valuable and powerful vertebrate model for the study of human streptococcal infections. In the present study we demonstrate that adult zebrafish are susceptible to GBS infection through the intraperitoneal and intramuscular routes of infection. Following intraperitoneal challenge with GBS, zebrafish developed a fulminant infection 24-48 h post-injection, with signs of pathogenesis including severe inflammation at the injection site and meningoencephalitis. Quantification of blood and brain bacterial load confirmed that GBS is capable of replicating in the zebrafish bloodstream and penetrating the blood-brain barrier, resulting in the induction of host inflammatory immune responses in the brain. Additionally, we show that GBS mutants previously described as avirulent in the mice model, have an impaired ability to cause meningitis in this new in vivo model. Taken together, our data demonstrates that adult zebrafish may be used as a bacterial meningitis model as a means for deciphering the pathogenesis and development of invasive GBS disease.