Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0348321 (Haemophilus)
 15,372 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This study was undertaken to determine whether the terminal complement components (C3-9) are involved in the nonimmune host defense against Haemophilus influenzae type b septicemia and meningitis. Using cobra venom factor, infant rats were depleted of C3 and C5. After intranasal challenge with H. influenzae type b, the complement-depleted rats developed a greater incidence and magnitude of bacteremia and a higher mortality rate. In contrast to the effects on bacteremia, complement depletion did not directly influence either the occurrence of meningitis or bacterial multiplication within the cerebrospinal fluid. These experiments provide evidence that the complement system may be an important mechanism of natural immunity to H. influenzae type b.
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PMID:Participation of complement in the nonimmune host defense against experimental Haemophilus influenzae type b septicemia and meningitis. 108 32

A total of 5,883 blood samples from patients with suspected bacteremia were inoculated concurrently into each of three media under vacuum with CO2: tryptic soy broth (TSB) with sodium polyanetholesulfonate (SPS), TSB with SPS and cysteine, and TSB with SPS and sucrose. There were 395 positive cultures, excluding presumed contaminants. No significant differences were noted with the addition of cysteine to TSB with SPS, and no streptococcal mutants requiring thiol groups were isolated. Haemophilus, Staphylococcus aureus, and bacteriodaceae were isolated more frequently (P less than 0.05) in the absence of sucrose. The addition of sucrose to TSB containing SPS did not significantly increase the rate of positivity or the time interval to detection of positivity of any group of bacteria.
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PMID:Evaluation of blood culture media supplemented with sucrose or with cysteine. 117 94

A review of 104 patients with acute orbital cellulitis during the past decade showed that the frequency of hospital admissions for this disease has increased recently. Roentgenograms showed paranasal sinus in 77 of 91 patients. Haemophilus influenzae and Diplococcus pneumoniae were recovered from the blood of 20 and 6 patients, respectively. Four children had concomitant H influenzae meningitis. Bacteremia was demonstrated in 29% and more common in those with extensive orbital involvement, those not receiving antibiotics at the time of culture, and those less than 2 years old. Some of the 26 patients with less extensive involvement were bacteremic (17%), had leukocytosis, or roentgenographic evidence of sinusitis. Most children received large doses of ampicillin sodium and methicillin sodium intravenously until signs and symptoms had almost abated. With this regimen, there were no orbital, ocular, or other complications.
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PMID:Acute orbital cellulitis. 126 55

Cellulitis of extremities due to Haemophilus influenzae is rare in children. Only 60 cases of Haemophilus influenzae cellulitis of the extremities have been reported. It usually affects young children between the ages of six and 24 months. The lesion often presents with a red-to-bluish-purple discoloration overlying the involved area. High fever and leukocytosis are commonly found. Culture of needle aspirate and blood with appropriate media is necessary for diagnosis. Early diagnosis is especially important because of associated bacteremia and the subsequent possibility of life-threatening complications such as meningitis. We reported a 8-month-old female infant with Haemophilus influenzae type b cellulitis over the right hand. She was admitted due to high fever and painful swelling of the right hand. Edematous right hand with dusky erythematous skin over the dorsum and swelling of the palm with limitation of range of motion were noted on admission. Smear of needle aspirate revealed gram negative bacilli and beta-lactamase(-) Haemophilus influenzae type b was cultivated in the blood culture. She was successfully treated with ampicillin and discharged with stable condition.
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PMID:[Haemophilus influenzae cellulitis of the hand: report of one case]. 129 50

The in vitro activity of OPC-17116 was compared to that of five similar fluoroquinolones (ciprofloxacin, enoxacin, norfloxacin, ofloxacin and temafloxacin). A total of 700 isolates from recent cases of clinical bacteremia were tested. Fifty additional stock strains with well-characterized resistance mechanisms were also processed. The minimal concentrations inhibiting 90% of strains (MIC90) of Enterobacteriaceae species were for OPC-17116 0.015-0.5 micrograms/ml and for ciprofloxacin 0.015-0.25 micrograms/ml. Moraxella catarrhalis, Haemophilus influenzae and Neisseria gonorrhoeae were very susceptible to OPC-17116 (MIC90 0.015 micrograms/ml) thus being fourfold more active than ciprofloxacin. For all beta-hemolytic streptococci and pneumococci OPC-17116 MICs were less than or equal to 0.5 micrograms/ml. The most resistant enteric bacilli were among the Citrobacter freundii and Providencia rettgeri strains (MIC90 0.5 micrograms/ml). Pseudomonas aeruginosa strains were comparably susceptible to OPC-17116 (MIC90 0.5 micrograms/ml). Low pH and CO2 incubation had an adverse effect on OPC-17116 MICs, and resistance development was documented among current clinical isolates of staphylococci, pseudomonas and some Enterobacteriaceae.
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PMID:In vitro activity of OPC-17116 compared to other broad-spectrum fluoroquinolones. 132 89

Brazilian purpuric fever is a rapidly fatal childhood disease associated with a clonal strain of Haemophilus influenzae biogroup aegyptius. We describe a conserved, surface-exposed epitope present on 95% of H. influenzae biogroup aegyptius isolates that are associated with Brazilian purpuric fever. This epitope, defined by reaction with the monoclonal antibody 8G3, is on or associated with the 48-kDa heat-modifiable P1 protein. The epitope is absent on strains of H. influenzae biogroup aegyptius that are not associated with Brazilian purpuric fever but is present on one strain of H. influenzae biotype II. None of 81 other Haemophilus strains tested reacted with 8G3. The sensitivity and specificity of the 8G3 monoclonal antibody in detecting Brazilian case-clone strains of H. influenzae biogroup aegyptius associated with Brazilian purpuric fever are 95 and 99%, respectively. Immunoelectron microscopy revealed that the epitope is surface exposed, and N-terminal amino acid sequencing of an 8G3-reactive P1 protein from a strain of H. influenzae biogroup aegyptius showed 100% correlation with the published N-terminal amino acid sequence of a P1 protein of H. influenzae type b. The virulence of the organism in an infant rat model of bacteremia was not dependent on the expression of this epitope.
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PMID:Stable, conserved outer membrane epitope of strains of Haemophilus influenzae biogroup aegyptius associated with Brazilian purpuric fever. 137 93

To determine the risk of bacteremia during tonsillectomy, we cultured blood specimens that were taken from 32 children during surgery and tonsillar swabs that were obtained just before excision, and compared the results with quantitative cultures of the excised tonsillar tissue. Twenty-five children had Haemophilus influenzae within the tonsillar tissue (density range, 10(3) to 10(8) colony-forming units per gram), and seven had Streptococcus pyogenes (density, 10(3) colony-forming units per gram in one case, 10(5) colony-forming units per gram in one case, and 10(6) colony-forming units per gram in five cases). Twelve perioperative blood cultures were positive; H influenzae was found nine times, and Micrococcus species was found one time, and alpha-hemolytic streptococci were found two times. Haemophilus influenzae was always present in the corresponding tonsillar specimens, although there was no apparent relationship between the density of colonization of the tonsillar tissue and a positive blood culture.
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PMID:Bacteremia during tonsillectomy. 141 2

For better definition of the clinical course and outcome of children with occult bacteremia caused by Haemophilus influenzae type b (Hib), we reviewed the medical records of children who were initially managed as outpatients and subsequently found to be bacteremic. At Yale-New Haven Hospital (1971 to 1987) and the Children's Hospital of Philadelphia (1982 to 1987), 69 previously healthy children were identified with occult Hib bacteremia. Their median age was 14 months (range, 4 to 89 months). Thirty-six (52%) of the 69 were either febrile and/or had a focus of serious infection at follow-up (meningitis (17), pneumonia (5), epiglottitis (3), cellulitis (5), and septic arthritis (3)). Although the remaining 33 children (48%) were afebrile and appeared well on reevaluation, 3 of these 33 were still bacteremic and another 5 subsequently developed focal Hib infections. These 8 children were significantly younger (median age, 8.5 months) than the 25 children who remained well (median age, 16 months; P = 0.03). Of the 28 children who had initially been treated with antimicrobials to which their organism was known to be susceptible, 12 (43%) were improved at reevaluation and remained well; 7 (23%) of the 31 patients who had not received such antimicrobials improved and remained well (P = 0.17). Children initially managed as outpatients and later found to have had Hib bacteremia are at risk of subsequently developing a serious focal infection.
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PMID:Outcome of children with occult bacteremia caused by Haemophilus influenzae type b. 152 40

Eighty-five American Indian children less than 16 years of age with Haemophilus influenzae bacteremia were retrospectively determined to have been treated as outpatients after their initial evaluation. We hoped to determine the proportion that developed new foci, the time interval to this development and whether age or temperature at presentation predicted outcome. Fifty-one (60%) presented with nonfocal findings. Seventy-two (85%) were treated with antibiotics at the initial visit. Although 49 (58%) of the patients were never hospitalized, a new focus was identified in 25 (29%), including 13 (15%) with a final diagnosis of meningitis. The new foci were identified within 6 days of presentation (median, 2 days). An additional 15 (18%) patients had no new focus but were febrile and/or ill at follow-up. All patients with meningitis or a second positive culture were hospitalized at the first follow-up visit. Age and temperature at presentation did not help predict outcome. All patients with H. influenzae bacteremia require prompt reevaluation and close follow-up by an experienced physician.
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PMID:Children with Haemophilus influenzae bacteremia initially treated as outpatients: outcome in 85 American Indian children. 152 41

The two isotypes of the fourth complement component are C4A and C4B. C4B forms ester bonds more efficiently than C4A and so, in theory, is more likely than C4A to bind to polysaccharide capsules of encapsulated bacteria. Two studies have reported homozygous C4B deficiency in patients with meningitis or bacteremia caused by encapsulated organisms. In the present study the association between C4B deficiency and these disorders was evaluated in four groups: patients with bacteremia, those with meningitis, those who developed Haemophilus influenzae type b (Hib) disease after Hib polysaccharide vaccination, and patients less than 1 year old with meningitis. Healthy adults served as controls. Of the 257 patients, 2.3% had homozygous C4B deficiency compared with 3.7% of 349 controls. According to these data, there is no increase in homozygous C4B deficiency among patients with bacteremia or meningitis caused by encapsulated bacteria.
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PMID:C4B deficiency is not associated with meningitis or bacteremia with encapsulated bacteria. 156 46


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