1/215. Identification of the cause of a brain abscess by direct 16S ribosomal dna sequencing. We report the case of a young man who apparently suffered successive episodes of meningitis and cerebral abscess over a 1-month period, both of which were diagnosed by two different molecular approaches; PCR for Neisseria meningitidis IS1106 from CSF and 16S rRNA gene sequencing on a specimen of brain pus. In each case, cultures were negative due to prior antibiotic therapy. ( info) |
2/215. Meningococcal disease and meningitis: a review of deaths proceeding to coroner directed autopsy in Auckland. AIMS: To assist the early diagnosis of meningitis, by finding trends and patient profiles, where delay or other factors may have lead to a fatal outcome. methods: All deaths from meningitis and meningococcal disease, confirmed at autopsy were reviewed. The study involved the Auckland area, in the period January 1988 November 1997. RESULTS: Cases were divided into those caused by N meningitidis and other meningitides. death due to N meningitidis is often within 12-24 hours of the first symptomatology. Symptoms are often vague and may be indistinguishable from any other infection, often leading to fatal patient or doctor delay. A diagnosis of meningococcal disease cannot be excluded on: no rash (44%), no "meningitis" symptoms as sepsis without meningitis occurs (44%), age (50% were over 15 years old) or the presence of other abnormalities, eg bronchopneumonia or hydrocephalus. Non-N meningitidis menigitis is a disease of the very young or old, its time course is also swift with 30% suffering similar vague symptoms for less than 24 hours before death. CONCLUSIONS: For both categories, treat immediately and treat on suspicion, otherwise conformation of the diagnosis might be postmortem. ( info) |
3/215. Nosocomial meningococcemia in a physician. We report the case of a pediatrician who developed meningococcal meningitis after performing endotracheal intubation without protection on a child who was suspected of having meningoencephalitis. This case emphasizes the necessity for healthcare workers who perform high-risk procedures to use personal protection devices (i.e., respirators and protective goggles). Unprotected healthcare workers with high exposure to Neisseria meningitidis should receive chemoprophylaxis. ( info) |
| We report the case of an 18-year-old man with meningococcal meningitis and low serum concentrations of mannose-binding lectin (MBL). His mother and grandfather, who had also had meningitis in early adulthood, also had low concentrations of MBL in their serum. ( info) |
5/215. properdin deficiency in a large Swiss family: identification of a stop codon in the properdin gene, and association of meningococcal disease with lack of the IgG2 allotype marker G2m(n). properdin deficiency was demonstrated in three generations of a large Swiss family. The concentration of circulating properdin in affected males was < 0.1 mg/l, indicating properdin deficiency type I. Two of the nine properdin-deficient males in the family had survived meningitis caused by Neisseria meningitidis serogroup B without sequel. Two point mutations were identified when the properdin gene in one of the properdin-deficient individuals was investigated by direct solid-phase sequencing of overlapping polymerase chain reaction (PCR) products. The critical mutation was found at base 2061 in exon 4, where the change of cytosine to thymine had generated the stop codon TGA. The other mutation was positioned at base 827 in intron 3. The stop codon in exon 4 was also demonstrated by standard dideoxy sequencing in three additional family members. The question was asked if genetic factors such as partial C4 deficiency and IgG allotypes could have influenced susceptibility to meningococcal disease in the family. No relationship was found between C4 phenotypes and infection. Interestingly, the two properdin-deficient males with meningitis differed from the other properdin-deficient persons in that they lacked the G2m(n) allotype, a marker known to be associated with poor antibody responses to T-independent antigens. This implies that the consequences of properdin deficiency might partly be determined by independent factors influencing the immune response. ( info) |
6/215. Isolation of meningococci in meningococcal endophthalmitis. We describe a case of bilateral hypopyon in a 7-year-old African male receiving systemic antibiotic therapy for meningococcal meningitis. Aqueous from paracentesis of the left eye contained intra- and extra-cellular Gram negative diplococci. We believe this is the first report of isolation of the organism since the advent of antibiotic treatment. ( info) |
7/215. Unusual cluster of mild invasive serogroup C meningococcal infection in a university college. The objective of this study was to describe the epidemiology and public health response to an apparent cluster of Neisseria meningitidis serogroup C infection in university students in a residential college. A conventional epidemiological approach was taken, supported by routine and novel diagnostic techniques. Over the two days of 21-22 August 1997, three cases of suspected meningococcal infection were notified from a residential college complex at a university campus in the Sydney metropolitan area. Neisseria meningitidis was grown from throat swabs of all three cases, and was isolated from the blood of one case only. All three isolates were typed as C:2a:P1.5,2. Seroconversion was demonstrated by a novel method in the three cases. Rifampicin was given to all identified contacts. Forty-seven days after the index case, a 19 year old female living in the same complex was diagnosed with bacterial meningitis, and identified contacts given rifampicin. When this isolate was found to be group C, it was decided to vaccinate residents of the college complex. Genotyping and serotyping (C:2a:P1.5) later revealed the fourth isolate to be distinct from isolates from Cases 1-3. In conclusion the authors note that australia's increasing capacity to type meningococcal strains is essential to understanding the epidemiology of this disease. Furthermore, typing information is of critical importance when decisions are made regarding mass vaccination. As early antibiotic treatment may inhibit isolation of the organism, development of novel approaches to diagnosis and typing should be supported. ( info) |
8/215. Delayed deterioration of hearing following bacterial meningitis. Bacterial meningitis is an important cause of acquired sensorineural deafness in childhood. deafness following meningitis may be progressive. Previous reports have shown deterioration in hearing up to 12 years after the illness. We present two cases of sensorineural deafness following meningitis. Severe to profound sensorineural hearing losses were detected immediately after meningitis in these patients. The hearing subsequently deteriorated in both cases. Deterioration in hearing thresholds occurred 17 years after the illness in one case. In the other patient the hearing got progressively worse three years after meningitis. She subsequently required a cochlear implant. ( info) |
9/215. Vaccination responses to capsular polysaccharides of Neisseria meningitidis and haemophilus influenzae type b in two C2-deficient sisters: alternative pathway-mediated bacterial killing and evidence for a novel type of blocking IgG. meningitis caused by Neisseria meningitidis serogroup W-135 was diagnosed in a 14-year-old girl with a history of neonatal septicemia and meningitis caused by group B streptococci type III. C2 deficiency type I was found in the patient and her healthy sister. Both sisters were vaccinated with tetravalent meningococcal vaccine and a conjugate haemophilus influenzae type b vaccine. Three main points emerged from the analysis. First, vaccination resulted in serum bactericidal responses demonstrating anticapsular antibody-mediated recruitment of the alternative pathway. Second, addition of C2 to prevaccination sera produced bactericidal activity in the absence of anticapsular antibodies, which suggested that the bactericidal action of antibodies to subcapsular antigens detected in the sera might strictly depend on the classical pathway. A third point concerned a previously unrecognized type of blocking activity. Thus, postvaccination sera of the healthy sister contained IgG that inhibited killing of serogroup W-135 in C2-deficient serum, and the deposition of C3 on enzyme-linked immunosorbent assay plates coated with purified W-135 polysaccharide. Our findings suggested blocking to be serogroup-specific and dependent on early classical pathway components. Retained opsonic activity probably supported post-vaccination immunity despite blocking of the bactericidal activity. The demonstration of functional vaccination responses with recruitment of alternative pathway-mediated defense should encourage further trial of capsular vaccines in classical pathway deficiency states. ( info) |
10/215. spinal cord infarction and tetraplegia--rare complications of meningococcal meningitis. A previously healthy 25-yr-old female developed flaccid areflexic tetraplegia, with intact cranial nerve function, 36 h after the diagnosis of bacterial meningitis. polymerase chain reaction studies of cerebrospinal fluid and blood were positive for neisseria meningitidis, serogroup b. Magnetic resonance of the cervicothoracic spine revealed increased signal intensity and expansion in the lower medulla, upper cervical cord and cerebellar tonsils. Neurosurgical consultation recommended hyperventilation, dexamethasone and regular mannitol therapy rather than decompressive intervention. The clinical course over the following 12 days was complicated by the development of progressive central nervous and multisystem organ failure with disseminated intravascular coagulopathy. autopsy revealed cerebral oedema with cystic infarction extending from the medulla to the upper cervical cord and cerebellar tonsils. Flaccid areflexic tetraplegia with spinal cord infarction has not been reported following bacterial infection in an adult. The clinical implications would suggest complete central nervous system evaluation of patients recovering from meningococcal meningitis, since spinal cord lesions, although uncommon, do occur. In those very rare situations where a patient develops significant peripheral neurological deficits, urgent magnetic resonance imaging is warranted, to rule out an infective focus or an underlying anatomical anomaly. ( info) |