Brain injury in experimental neonatal meningitis due to group B streptococci

Kim, YS; Sheldon, RA; Elliott, BR; Liu, Q; Ferriero, DM; Täuber, MG (1995). Brain injury in experimental neonatal meningitis due to group B streptococci. Journal of neuropathology and experimental neurology, 54(4), pp. 531-9. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1097/00005072-199507000-00007

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We have characterized the pattern of brain injury in a rat model of meningitis caused by group B streptococci (GBS). Infant rats (12-14 days old; n = 69) were infected intracisternally with 10 microliters of GBS (log10(2.3) to 4.5 colony-forming units). Twenty hours later, illness was assessed clinically and cerebrospinal fluid was cultured. Animals were either immediately euthanized for brain histopathology or treated with antibiotics and examined later. Early GBS meningitis was characterized clinically by severe obtundation and seizures, and histopathologically by acute inflammation in the subarachnoid space and ventricles, a vasculopathy characterized by vascular engorgement, and neuronal injury that was most prominent in the cortex and often followed a vascular pattern. Incidence of seizures, vasculopathy and neuronal injury correlated with the inoculum size (p < 0.01). Early injury was almost completely prevented by treatment with dexamethasone. Within days after meningitis, injured areas became well demarcated and showed new cellular infiltrates. Thirty days post-infection, brain weights of infected animals treated with antibiotics were decreased compared to uninfected controls (1.39 +/- 0.18 vs 1.64 +/- 0.1 g; p < 0.05). Thus, GBS meningitis in this model caused extensive cortical neuronal injury resembling severe neonatal meningitis in humans.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute for Infectious Diseases

UniBE Contributor:

Täuber, Martin G.

ISSN:

0022-3069

ISBN:

7602326

Publisher:

Lippincott Williams & Wilkins

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:00

Last Modified:

04 May 2014 23:17

Publisher DOI:

10.1097/00005072-199507000-00007

PubMed ID:

7602326

Web of Science ID:

A1995RH64100007

URI:

https://boris.unibe.ch/id/eprint/25778 (FactScience: 60925)

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