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Query: UMLS:C0085437 (bacterial meningitis)
 4,038 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Synergy, determined by isobolograms constructed from the minimal inhibitory concentrations of combinations of ampicillin and chloramphenicol, was observed against six of 13 ampicillin-susceptible Haemophilus influenzae type b isolates and against five of eight ampicillin-resistant strains by using a small inoculum of 10(4) colony forming units (CFU) per milliliter. Synergy occurred against nine of 13 ampicillin-susceptible and against two of eight ampicillin-resistant strains using a large inoculum of 10(7) CFU/ml. When synergy was not observed, additive effects occurred against the remainder of isolates. Additive effects were also observed against single strains of chloramphenicol-resistant, nontypeable H. influenzae and H. parainfluenzae. No antagonism was observed. These data indicate that ampicillin and chloramphenicol may be synergistic against a significant number of H. influenzae strains depending on inoculum size, but the effect is unpredictable for a given isolate. These data support the recommendation that ampicillin and chloramphenicol both be used as initial therapy for patients with suspected bacterial meningitis.
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PMID:Effect of ampicillin and chloramphenicol against Haemophilus influenzae. 30 90

The growth of parent influenza viruses A/England/939/69 and A/PR/8/34, and clones 6, 7, and 64C, derived by recombination, was studied in newborn rats. Using an inoculum of 10(4.0) EID50, influenza virus A/England/939/69 produced the highest titres of virus in rat turbinates at 48 hours after inoculation; clones 6 and 7 and A/PR/8/34 grew to lower titres; and clone 64C grew to the lowest titre. These differences were less apparent when 10(2.0) EID50 of virus was used as an inoculum, and rats were not infected by smaller inoculum of any of the virus strains. Infection with 10(4.0) EID50 of all viruses produced lung infection; at 48 hours after infection, the highest titres were recovered from rats infected with A/PR/8/34 and A/England/939/69 virus. Prior infection with A/England/939/69 or A/PR/8/34 increased the incidence of bacteraemia and meningitis following intranasal inoculation of Haemophilus influenzae type b; infection with clone 64C did not enhance bacterial meningitis, while infection with clone 6 gave an intermediate result. Volunteer studies with these viruses have shown that influenza virus A/England/939/69 was virulent, clones 6 and 7 were attenuated, clone 64C was over-attenuated, and A/PR/8/34 virus was noninfective for man. The relative titres of virus recovered from turbinates taken 48 hours after infection with 10(4.0) EID50 of virus and the ability of virus infection to enhance bacterial infection correlated with the property of virus attenuation for man for four of the five strains tested; however, no correlation was seen for A/PR/8/34 virus, which is a result also found in other laboratory tests designed to measure virulence for man.
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PMID:Influenza virus infection in newborn rats: a possible marker of attenuation for man. 30 96

Ampicillin remains the preferred drug for most cases of bacterial meningitis, including those due to Haemophilus influenzae type b. A prospective study was performed comparing high (400 mg/kg per day)- and low (150 mg/kg per day)-dosage regimens of ampicillin in the treatment of 172 patients with bacterial meningitis. Response to both regimens was equivalent in terms of average hospital stay, duration of ampicillin therapy, microbiological response, and death and residua. Patients with H. influenzae infections treated with low-dosage regimens had slightly prolonged febrile courses. This study suggests that high-dosage regimens of ampicillin offer no benefit over low-dosage regimens in the treatment of bacterial meningitis.
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PMID:Ampicillin dosage in bacterial meningitis with special reference to Haemophilus influenzae. 31 77

A combination of forced sedimentation and air-drying has been used to prepare cerebrospinal fluid cells for scanning electron microscopy. On the basis of surface morphology, the similarity of CSF cells to blood cells is emphasized. Various types of cells were demonstrated in bacterial meningitis, multiple sclerosis and CNS leukemia.
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PMID:A simple method for demonstrating cells in the cerebrospinal fluid by scanning electron microscopy. 32 18

The group B beta-hemolytic streptococcus is responsible for an escalating frequency of neonatal meningitis. Of the 18 consecutive cases we report in this study, the mortality was 17%. Among the 15 survivors, there were two children with extensive neurological and psychological impairment. There were no major differences between the survivors and controls in tests of hearing and language function, social skills, and psychological testing. There was a greater number of minor neurological signs among the study group. The mortality and morbidity of group B beta-hemolytic streptococcal meningitis is apparently substantially less than that of all other types of neonatal bacterial meningitis.
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PMID:The sequelae of group B beta-hemolytic streptococcal meningitis in early infancy. 32 68

The pathogenesis of bacterial meningitis was studied in infant rats. Intranasal intoculation of greater than 10(3) Haemophilus influenzae type b resulted in an incidence of bacteremia that was directly related to the size of hte challenge inoculum. The temporal and quantitative relationship of bacteremia to meningitis indicated that bacteria spread to the meninges by the hematogenous route and that the magnitude of bacteremia was a primary determinant in the development of meningitis. In a sparate series of experiments, infant rats that were fed Escherichia coli strain C94 (O7:K1:H-) became colonized and developed bacteremia and meningitis, but invasive disease was rare when rats were fed E. Coli strain Easter (O75:K100:H5). A comparison of intranasal vs. oral challenge indicated that the nasopharynx was the most effective route for inducing H. influenzae bacteremia, whereas the gastrointestinal route was the more effective challenge route for the E. coli K1 serotype.
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PMID:The infant rat as a model of bacterial meningitis. 33 Jul 77

Counterimmunoelectrophoresis (CIE) and fluorescent antibody (FA) technique were evaluated in the diagnosis of bacterial meningitis caused by Neisseria meningitidis (groups A, B, C), Streptococcus pneumoniae and Haemophilus influenzae type b. FA was positive in 80% and CIE in 70% of the 59 cases of bacterial meningitis investigated. Ultrasonic treatment of the cerebrospinal fluid (CSF) increased the efficacy of CIE from 50% to 70%. By FA it was possible to demonstrate bacterial antigen in CSF up to 3 days after the beginning of antibacterial therapy. Bacterial antigens could be demonstrated by the two immunological methods from 2 to 24 days when stored at 20 degrees C. At storage at 4 degrees C the antigens were demonstrable for 2 to 13 weeks by FA and for 2 to 10 weeks by CIE.
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PMID:An evaluation of two immunological methods in the diagnosis of bacterial meningitis: the effect of ultrasonic treatment of the cerebrospinal fluid. 34 Dec 93

This article describes a technique for analyzing clinical data in order to guide patient management decisions. The technique is illustrated by considering a specific decision problem encountered in the management of possible meningitis, namely, whether or not to administer antibiotics while awaiting the results of a CSF bacterial culture. Data from 303 patients with meningitis are analyzed in order to determine which combination of clinical variables best discriminates between bacterial and aseptic cases. From these variables, a probability tree is constructed that indicates the probability of bacterial meningitis, depending on a patient's clinical characteristics. In addition to identifying the most important variables, the analysis reveals that a number of tests performed routinely on patients with meningitis are of questionable diagnostic value.
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PMID:A technique for analyzing clinical data to provide patient management guidelines. 34 87

Although anecdotal reports and the results of clinical trials suggest that corticosteroids may be efficacious in the treatment of acute bacterial meningitis, controlled and double-blind studies fail to support this view with the exception that corticosteroids may be of benefit for patients with pneumococcal meningitis. Corticosteroids may also be of benefit to patients with acute bacterial meningitis in the presence of life-threatening complications of increased intracranial pressure, such as coma, seizures, fluctuating blood pressure, or rapidly deteriorating mental status, but results of controlled or double-blind studies to substantiate this have not been reported. The possible advantages gained from the use of corticosteroids must be considered with regard to a significant detrimental effect in patients over 16 years of age.
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PMID:Corticosteroids as adjunctive therapy for acute bacterial meningitis. 38 81

Clinical trials were carried out with cafamandole (sodium salt) in pediatric infections. Results were as follows; 1. CMD was applied to 13 patients with pneumonia, 1 patient each with submandibular abscess, urinary tract infection and bacterial meningitis. 2. Results were excellent in 1 and good in 13 patients, being overall efficacy rate 93.3%. 3. Slight elevations of GOT and GPT were observed in 1 patient. No other serious side effects were observed or reported.
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PMID:[Clinical evaluation of cefamandole in infants and children (author's transl)]. 38 95


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