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)

The microbiology of 87 patients admitted to hospital, over a five-year period, with acute sinusitis was retrospectively analysed. Sixty-three patients had one or more of an orbital, intracranial, soft tissue or bony complication. Eighty-four patients had maxillary sinus washouts, while 48 required a surgical procedure to their sinuses, and 33, drainage of an empyema. Streptococcus milleri and Haemophilus influenzae were the commonest organisms isolated from sinus aspirates (44 per cent), with a noticeable absence of Streptococcus pneumoniae (10 per cent). Organisms cultured from intracranial, soft tissue or orbitral empyemas were predominantly Streptococcus milleri (50 per cent) and Staphylococcus aureus (25 per cent) with an absence of Haemophilus influenzae (four per cent) and Streptococcus pneumoniae (four per cent). Ampicillin is an appropriate first line antimicrobial agent in patients with acute complicated sinusitis with the addition of cloxacillin in cases with an empyema. Chloramphenicol or ceftriaxone is used in cases with an intracranial complication.
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PMID:Antibiotic choice in acute and complicated sinusitis. 962 76

Antimicrobial resistance has emerged among the three major bacterial pathogens causing meningitis. Chloramphenicol resistance in the meningococcus recently has been described, and although intermediate penicillin resistance is common in some countries, the clinical importance of penicillin resistance in the meningococcus has yet to be established. Beta-lactamase-producing Haemophilus influenzae are relatively common, and chloramphenicol resistance is emerging. Third-generation cephalosporins are required to treat meningitis caused by these resistant strains. Pneumococcus resistance to penicillin and to chloramphenicol is widespread, and resistance to third-generation cephalosporins is found in many parts of the world. Correct management of these strains includes the addition of vancomycin or rifampin to therapy with third-generation cephalosporins.
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PMID:Emergence of drug resistance. Impact on bacterial meningitis. 1047 May 59

The aim of this study was to prospectively analyze the bacterial etiology of community-acquired pneumonia in adults in Spain. From May 1994 to February 1996, 392 episodes of CAP diagnosed in the emergency department of a 600-bed university hospital were studied. An etiological diagnosis based on noninvasive microbiological investigations was achieved in 228 cases (58%); 173 of these diagnoses were definitive and 55 probable. Streptococcus pneumoniae, which caused 23.9% of the episodes, was the predominant pathogen observed, followed by Chlamydia pneumoniae (13.5%) and Legionella pneumophila (12.5%). Other less frequent pathogens found were Haemophilus influenzae (2.3%), Pseudomonas aeruginosa (1.5%), Mycoplasma pneumoniae (1.3%), Coxiella burnetii (1%), Moraxella catarrhalis (2 cases), Nocardia spp. (2 cases), and Staphylococcus aureus (2 cases). Streptococcus pneumoniae was significantly more frequent in patients with underlying disease and/or age > or =60 years (28% vs. 13%, P = 0.002), while Legionella pneumophila was more frequent in patients below 60 years of age and without underlying disease (20% vs. 9%, P = 0.006). Likewise, Streptococcus pneumoniae and Legionella pneumophila were the most frequent etiologies in patients requiring admission to the intensive care unit, occurring in 29% and 26.3% of the patients, respectively. In addition to Streptococcus pneumoniae, other microorganisms such as Chlamydia pneumoniae and Legionella spp. should be seriously considered in adults with community-acquired pneumonia when initiating empiric treatment or ordering rapid diagnostic tests.
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PMID:Prospective study of community-acquired pneumonia of bacterial etiology in adults. 1069 Nov 94

High antimicrobial resistance rates in Streptococcus pneumoniae has caused a need for alternative therapies. Chloramphenicol is currently being reconsidered as an empiric treatment for respiratory tract infections particularly in developing countries. In this study, we assessed the ability of the reference broth microdilution and Etest (AB BIODISK, Solna, Sweden) methods to detect chloramphenicol resistance among pneumococci as compared to the chloramphenicol acetyltransferase (CAT) assay. In the 1999 SENTRY Antimicrobial Surveillance Program, 1671 S. pneumoniae strains from respiratory tract infections were collected from 49 participants located in the Americas and Europe. The rates of penicillin and macrolide non-susceptibility were 15.6-41.3 and 12.4-26.8%, respectively. All chloramphenicol-resistant strains were CAT assay positive (n = 154; 9.2% of isolates) with highest resistance rates in Europe (12.7%; range among sites, 0.0-38.5%) and the United States (10.6%; range, 0.0-25.6%). Etest MICs correlated with reference results and the current breakpoint for chloramphenicol resistance (> or = 8 microg/mL) remains valid for S. pneumoniae and Haemophilus influenzae (eight strains tested). CAT-mediated resistances dominate among chloramphenicol-resistant S. pneumoniae, and marked geographic variations in susceptibility were discovered.
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PMID:Accuracy of broth microdilution and E test methods for detecting chloramphenicol acetyl transferase mediated resistance in Streptococcus pneumoniae: Geographic variations in the prevalence of resistance in The SENTRY Antimicrobial Surveillance Program (1999). 1140 73

The CEACAM1 glycoproteins (formerly called biliary glycoproteins; BGP, C-CAM, CD66a, or MHVR) are members of the carcinoembryonic antigen family of cell adhesion molecules. In the mouse, splice variants of CEACAM1 have either two or four immunoglobulin (Ig) domains linked through a transmembrane domain to either a short or a long cytoplasmic tail. CEACAM1 has cell adhesion activity and acts as a signaling molecule, and long-tail isoforms inhibit the growth of colon and prostate tumor cells in rodents. CEACAM1 isoforms serve as receptors for several viral and bacterial pathogens, including the murine coronavirus mouse hepatitis virus (MHV) and Haemophilus influenzae, Neisseria gonorrhoeae, and Neisseria meningitidis in humans. To elucidate the mechanisms responsible for the many biological activities of CEACAM1, we modified the expression of the mouse Ceacam1 gene in vivo. Manipulation of the Ceacam1 gene in mouse embryonic stem cells that contained the Ceacam1a allele yielded a partial knockout. We obtained one line of mice in which the insert in the Ceacam1a gene had sustained a recombination event. This resulted in the markedly reduced expression of the two CEACAM1a isoforms with four Ig domains, whereas the expression of the two isoforms with two Ig domains was doubled relative to that in wild-type BALB/c (+/+) mice. Homozygous (p/p) Ceacam1a-targeted mice (Ceacam1aDelta4D) had no gross tissue abnormalities and were viable and fertile; however, they were more resistant to MHV A59 infection and death than normal (+/+) mice. Following intranasal inoculation with MHV A59, p/p mice developed markedly fewer and smaller lesions in the liver than +/+ or heterozygous (+/p) mice. The titers of virus produced in the livers were 50- to 100-fold lower in p/p mice than in +/p or +/+ mice. p/p mice survived a dose 100-fold higher than the lethal dose of virus for +/+ mice. +/p mice were intermediate between +/+ and p/p mice in susceptibility to liver damage, virus growth in liver, and susceptibility to killing by MHV. Ceacam1a-targeted mice provide a new model to study the effects of modulation of receptor expression on susceptibility to MHV infection in vivo.
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PMID:Targeted disruption of the Ceacam1 (MHVR) gene leads to reduced susceptibility of mice to mouse hepatitis virus infection. 1148 63

High-resolution two-dimensional gel electrophoresis of pulse-labeled Haemophilus influenzae extracts allows for the separation and quantification of more than five hundred protein spots. We have determined the changes in the protein synthesis patterns triggered by treatment with inhibitors of transcription, Rifampicin (Rif) and translation, Chloramphenicol (Chl), Erythromycin (Ery), Fusidate (Fus), Puromycin (Pur), Kanamycin (Kan), Streptomycin (Str), and Tetracycline (Tet) relative to the total protein synthesis rate. More than 200 spots changed in intensity under at least one condition. With the exception of the aminoglycosides, Kan and Str, all inhibitors triggered a clear increase in the synthesis rates of ribosomal proteins and RNA polymerase subunits. Northern analysis of rpoA, rpoB, rpoC, and six ribosomal protein genes indicated induction of transcription as well as antitermination as part of the mechanism of the regulation of gene expression. Total RNA synthesis was increased after exposure to Chl, Ery, Fus, and Tet, whereas Str had no effect. Rif led to an almost complete shutdown of RNA synthesis. Exposure to Chl, Ery, Fus, Rif, and Tet resulted in a decrease in the concentration of the stringent factor, guanosine 5',3'-bis-diphosphate (ppGpp) whereas Str again had no effect. Thus, as in Escherichia coli, the response of H. influenzae to translational inhibitors appears to be mediated by the regulatory nucleotide ppGpp.
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PMID:Mechanism-related changes in the gene transcription and protein synthesis patterns of Haemophilus influenzae after treatment with transcriptional and translational inhibitors. 1168 Dec 6

Antibiotic susceptibility of ten bacteria i.e. Neisseria catarrhalis, Salmonella typhi, S. enteritidis, Haemophilus influenzae, Bacillus subtilis, Pseudomonas fluorescence, Pseudomonas aeruginosa, Proteus vulgaris, Staphylococcus aureus and E. coli to twenty antibiotics i.e. cefpirom (30 mcg), ceftriaxone (30 mcg), erythromycin (15 mcg), doxycycline (30 mcg) lomefloxacin (10 mcg), sisomicin (30 mcg), vancomycin (30 mcg), augmentin (30 mcg), ampicillin (30 mcg), cotrimoxazole (25 mcg), cefotaxime (30 mcg), Chloramphenicol (30 mcg), cephalexin (30 mcg), tetracycline (30 mcg), ciprofloxacin (5 mcg), nitrofurantoin (300 mcg), nalidixic acid (30 mcg), pefloxacin (10 mcg), norfloxacin and ofloxacin (5 mcg) was studied to evaluate the antimicrobial efficacy of recently introduced second and third generation antibiotics. All the test strains were sensitive to pefloxacin, erythromycin, augmentin and chloramphenicol. Maximum resistance to cefpirom excluding E. coli and S. typhi and co-trimoxazole except S. typhi, Pseudomonas aeruginosa was observed, occasional resistance was seen against ceftriaxone, vancomycin and cefotaxime.
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PMID:In vitro susceptibility of new generation of antibacterial antibiotics against pathogenic bacteria. 1202 80

A retrospective study on 357 children admitted to four Pediatric Infectious Disease Centers in Rome, affected by acute meningitis, during 10 years period, between January, 1, 1985 and December, 31, 1994 was carried out. Haemophilus influenzae type b was detected in 110 patients; all children aged between 1 month and 5 years; the maximum incidence (74.5%) was observed in patients under two years. The following diagnostic criteria were utilized: Gram stain of CSF; Latex test on CSF, blood, urine; CSF and blood cultures. The in vitro sensitivity of 65 isolates was tested by using the Kirby-Bauer method. We detected 15.3% of strains resistant to Ampicillin and 1.5% resistant to CAF. We also observed a high number of Hib strains resistant to Erythromycin and Cotrimoxazole. Only one strain Ceftriaxone resistant was isolated, confirming the high in vitro sensibility Hib to III generation cephalosporins that still remain the first choice drugs in Hib meningitis.
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PMID:[Haemophilus influenzae type b in meningitis: antibiotic resistance in pediatric patients]. 1496 94

Antimicrobial susceptibility of 79 non-typable Haemophilus influenzae isolations obtained from healthy children that attended two day-care centers in Marianao municipality. It was found resistance to trimetoprim/sulfamethoxazole (41,77 %), tetracycline (18,99), ampicilline (17,72 %), amoxicillin/ clavulanic acid (7,59 %) and chloramphenicol (6,33 %). 25,81 % of isolates showed multiresistance. 100 % of studied cases was sensitive to ceftriaxone, cefuroxime and norfloxacin. 28,57 % of ampicilline-resistent isolates produced beta-lactamase enzyme. Chloramphenicol resistance was mediated by the production of chloramphenicol acetyltransferase enzyme.
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PMID:[Antimicrobial susceptibility in non-typable Haemophilus influenzae strains isolated from healthy children]. 1584 11

A new type of ketolide bearing an N-aryl-alkyl acetamide moiety at the C-9 iminoether and its analogues were prepared, and their antibacterial activities and pharmacokinetic properties were evaluated. We found that the introduction of an (R)-alkyl group between the amide and iminoether groups could improve the pharmacokinetic properties while maintaining the activity against erythromycin-resistant Streptococcus pneumoniae. Among the ketolides prepared with the (R)-alkyl group, compound 5p with an N-(3-quinoxalin-6-yl-propyl)-propionamide moiety was found to have in vivo efficacy comparable to CAM with potent in vitro antibacterial activities against the key respiratory pathogens including Haemophilus influenzae and erythromycin-resistant S. pneumoniae.
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PMID:A new type of ketolide bearing an N-aryl-alkyl acetamide moiety at the C-9 iminoether: synthesis and structure-activity relationships. 1646 Sep 44


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