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Query: UMLS:C0036690 (sepsis)
 59,461 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Cerebral abscess is a rare complication of staphylococcal septicemia in infants associated with high mortality and morbidity. In the pathogenesis of abscess formation, S. aureus, one major causative agent, interacts with endothelial cells of the brain vessels before reaching the central nervous system. This study examined the growth of S. aureus in human brain microvascular endothelial cells (HBMEC) cultures stimulated with cytokines. IFN-gamma inhibited S. aureus replication by the induction of indoleamine 2,3-dioxygenase (IDO) in HBMEC. This activation of IDO in HBMEC could be shown by RT-PCR and by detection of kynurenine in culture supernatants of activated cells. Resupplementation of L-tryptophan abrogated the inhibitory effect of IFN-gamma on the growth of staphylococci, hence confirming the activation of indoleamine 2,3-dioxygenase as being responsible for the induced bacteriostasis. Addition of TNF-alpha enhanced the IFN-gamma mediated antibacterial effects, whereas TNF-alpha alone had no influence on staphylococcal growth. Stimulation of HBMEC with IFN-gamma failed to activate inducible nitric oxide synthase (iNOS) and subsequent production of nitric oxide (NO). Thus, intra- and extracellular depletion of L-tryptophan seems to be an important process in the defense against staphylococcal brain abscesses by means of creating an unfavorable microenvironment.
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PMID:Potential role of human brain microvascular endothelial cells in the pathogenesis of brain abscess: inhibition of Staphylococcus aureus by activation of indoleamine 2,3-dioxygenase. 1157 1

A case of solitary brain abscess in a term neonate caused by Kiebsiella pneumoniae is described. K. pneumoniae, although a common cause of neonatal septicemia, is rarely implicated as an etiological agent for cerebral abscess in this age-group. The interest of this case lies in the rarity of the causative organism and atypical features. In the absence of predisposing factors in the neonate, we suspect that the infection was transmitted vertically from the mother before or at the time of delivery since there was evidence of asymtomatic urinary tract infection in the antenatal period.
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PMID:An unusual case of neonatal brain abscess following Klebsiella pneumoniae septicemia. 1168 9

Rhodococcus equi is a rare form of opportunistic infection in humans, more common in the immunocompromised. We present a case of pulmonary infection and subsequent cerebral abscess secondary to R. equi in a patient receiving immunosuppression for a c-ANCA positive vasculitis. Heightened awareness of R. equi infection is important when considering immunocompromised patients presenting with sepsis, especially those with cavitating pulmonary lesions and normal respiratory commensals on culture. Delays in diagnosis and treatment can cause increased patient morbidity and mortality.
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PMID:Rhodococcus equi infection during treatment of a c-ANCA positive vasculitis: a case report. 1701 8

Infections with Clostridium perfringens usually manifest locally or spread to sepsis with multiorgan involvement, hemolysis or septic shock. Central nervous system (CNS) manifestations are rare and most frequently comprise meningitis with or without pneumencephalon, encephalitis, plexitis, cerebral abscess, or subdural empyema. The course of CNS affections is usually foudroyant and the outcome fatal. Neuromuscular manifestations of C. perfringens infections are much more frequent than CNS manifestations and comprise myonecrosis (gas gangrene), rhabdomyolysis, myositis, fasciitis, affection of the neuromuscular transmission, or affection of the peripheral nerves. C. perfringens infections usually start from the site of a recent surgical wound or trauma, a gastrointestinal or urogenital problem, or occur in association with malignancy. In quite a number of cases the source of origin remains speculative. Treatment of choice is surgical debridement of the infectious focus with radical removal of all necrotic tissue, resection of the corresponding lymphatics in addition to antibiotic therapy with penicillin G, aminoglycosides, or clindamycin or hyperbaric oxygenation. Despite these therapeutic options, the prognosis of CNS and neuromuscular involvement in an infection with C. perfringens is still poor. Only focal infections or clostridial brain abscesses may eventually have a more favorable outcome, if surgery and antibiotics are instantly provided. Generally, early recognition of the infectious agent is of paramount importance to prevent from spreading and the development of severe hemolysis, septic shock, or death.
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PMID:Neuromuscular and central nervous system manifestations of Clostridium perfringens infections. 1803 7

Brain abscess is a rare but very dangerous neurosurgical lesion. Prompt diagnosis and emergency surgical evacuation are the hallmarks of therapy. Brain abscess following ischemic and hemorrhagic stroke is a rare entity. These cases are often preceded by episodes of bacteremia, sepsis, and local infection. The authors report the case of a 30-year-old woman who presented with a cerebral abscess at the site of a recent intraparenchymal hemorrhage.
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PMID:Brain abscess formation at the site of intracerebral hemorrhage secondary to central nervous system vasculitis. 1851 42

Shunt infections are a common complication of ventriculoperitoneal (VP) shunts, but the formation of a brain abscess related to a shunt system is very rare. A 44-year-old woman had a VP shunt inserted for hydrocephalus secondary to a subarachnoid hemorrhage. She suffered an episode of meningitis and sepsis 8 months after the shunt operation. After recovering from the meningitis, she complained of a loss of cognitive function. An enhancing mass was found in the frontal lobe, around the frontal horn of the lateral ventricle, and the ventricular catheter was embedded inside the mass. The ventricular catheter and cerebral abscess were removed using neuroendoscopy. We present an interesting case of a shunt-related brain abscess which illustrates the usefulness of neuroendoscopy.
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PMID:Delayed cerebral abscess as a shunt complication and endoscopic removal of the ventricular catheter and abscess. 1909 36

The authors describe a clinical case regarding a young female patient affected by sepsis due to methicillin-resistant Staphylococcus aureus (MRSA), associated to meningoencephalitis and cerebral abscess. The patient had no contact with hospitals in the months prior to illness and had always been healthy. She recovered thanks to linezolid therapy. The MRSA strain proved positive for Panton-Valentine leukocidin (PVL positive) and was therefore defined as community-acquired MRSA (CA-MRSA).
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PMID:[A case of community-acquired MRSA (CA-MRSA) sepsis complicated by meningoencephalitis and cerebral abscess, successfully treated with linezolid]. 2004 6

The authors describe a 5-month-old male harbouring a giant Salmonella Typhimurium cerebral abscess who presented with progressively enlarging head size, without any features of septicemia. The report details the radiological findings, differential diagnoses and management problems regarding the index case.
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PMID:Enlarging head size as the only presentation of Salmonella Typhimurium brain abscess in an infant: a short report. 2395 76

Life-threatening infections of odontogenic or upper airway origin may extend to potential spaces formed by fascial planes of the lower head and upper cervical area. Complications include airway obstruction, mediastinitis, necrotizing fascitis, cavernous sinus thrombosis, sepsis, thoracic empyema, Lemierre's syndrome, cerebral abscess, orbital abscess, and osteomyelitis. The incidence of these "space infections" has been greatly reduced by modern antibiotic therapy. However, serious morbidity and even fatalities continue to occur. This study reviews complications of odontogenic infections. The search done was based on PubMed and Google Scholar, and an extensive published work search was undertaken. Advanced MEDLINE search was performed using the terms "odontogenic infections," "complications," and "risk factors."
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PMID:A review of complications of odontogenic infections. 2739 Apr 86

Neisseria meningitidis is a rare cause of meningitis and septicemia in neonates. There are few published case reports of neonatal meningococcal meningitis complicated by subdural empyema, cerebral abscess and hydrocephalus. Few cases of neonatal meningococcal meningitis have been reported in the literature with none of them having the complication of multiple cerebral abscesses in early neonatal period (<seven days of life). We report a case of meningococcal meningitis with multiple cerebral abscesses which presented on fifth day of life and developed hydrocephalus at five weeks of life requiring a Ventriculo Peritoneal (VP) shunt. To the best of our knowledge, this is the first documented case of neonatal meningococcal meningitis with multiple cerebral abscesses.
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PMID:Neisseria Meningitidis Causing Multiple Cerebral Abscesses in Early Neonatal Period: Case Report and Review of Literature. 2889 91


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