Effect of dexamethasone on experimental brain abscess
- 1 February 1987
- journal article
- Published by Journal of Neurosurgery Publishing Group (JNSPG) in Journal of Neurosurgery
- Vol. 66 (2), 264-269
- https://doi.org/10.3171/jns.1987.66.2.0264
Abstract
Dexamethasone has been used to manage brain edema in patients with intracranial abscess. However, its administration has often been delayed or avoided for fear of adverse effects upon normal host responses to infection. An experimental model of brain abscess in the rat was developed to determine if dexamethasone produced adverse effects on immune competence and collagen deposition in the region of the abscess. Sprague-Dawley rats were inoculated with Staphylococcus aureus and treated intraperitoneally each day with either dexamethasone (0.25 mg/kg) or saline solution. Surviving animals were sacrificed at 4, 8, 12, or 18 days after treatment. The brains were examined grossly for abscess formation and microscopically for intensity of the inflammatory response, abscess diameter, and wall thickness. There were no differences in mortality rates, abscess production rates, or abscess diameters when groups were compared. The intensity of inflammatory response was similar in both groups. In the group sacrificed 8 days after inoculation, a delay in collagen deposition was apparent, manifested as a thinner abscess wall in the experimental group (mean: 17.8 mu in dexamethasone-treated animals and 85 mu in saline-treated control animals: p = 1.0041). At 12 and 18 days after inoculation, there was no difference in abscess wall thickness between the control and experimental groups. Therapeutic doses of dexamethasone had little effect on mortality rates, incidence of abscess production, or intensity of inflammatory response in the experimental animals. Thus, dexamethasone did cause a delay in collagen deposition in the walls of experimental brain abscesses, but wall thickness 18 days after inoculation was not affected.Keywords
This publication has 42 references indexed in Scilit:
- Effect of Gentamicin and Dexamethasone on the Natural History of the Rat Escherichia coli Brain Abscess Model with Histopathological CorrelationNeurosurgery, 1984
- Experimental anaerobic brain abscessJournal of Neurosurgery, 1984
- Current concepts of bacterial infections of the central nervous systemJournal of Neurosurgery, 1983
- The influence of steroids on the penetration of antibiotics into brain tissue and brain abscesses. An experimental study in ratsJournal of Antimicrobial Chemotherapy, 1983
- Multiple abscesses of the brainJournal of Neurosurgery, 1981
- The bacteriology and chemotherapy of brain abscessJournal of Antimicrobial Chemotherapy, 1978
- Nonsurgical cure of brain abscess: Early diagnosis and follow‐up with computerized tomographyAnnals of Neurology, 1978
- Role of vascular proliferation on angiographic appearance and encapsulation of experimental traumatic and metastatic brain abscessesJournal of Neurosurgery, 1978
- Decadron in the treatment of cerebral abscessJournal of Neurosurgery, 1976
- Brain abscess and subdural empyema. Factors influencing mortality and results of various surgical techniques.Journal of Neurology, Neurosurgery & Psychiatry, 1976