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)

To assess the efficacy of oral erythromycin in the treatment of nonspecific vaginitis (NSV), conducted a nonrandom, unblinded pilot study among 17 women with symptoms and signs of NSV. At the completion of treatment, 10 of 13 patients had persistent symptoms, 9 of 13 had persistent abnormal discharge, and 11 of 13 had persistently positive cultures for Haemophilus vaginalis. Ten patients with persistent or relapsing NSV and four who did not complete erythromycin treatment were retreated with oral metronidazole, and 14 of 14 showed clinical improvement and eradication of H. vaginalis. The susceptibility of 27 clinical isolates of H. vaginalis to erythromycin was determined at pH 5.5, 6.0, 6.5, and 7.0. The minimal inhibitory concentration of erythromycin for H. vaginalis was approximately 10-fold higher at pH 5.5 than at pH 7.0. Erythromycin is not effective for the treatment of H. vaginalis-associated NSV; this may be partly attributable to the reduced activity of this drug in acidic vaginal secretions.
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PMID:Ineffectiveness of erythromycin for treatment of Haemophilus vaginalis-associated vaginitis: possible relationship to acidity of vaginal secretions. 4 14

The opsonic activity of normal human cerebrospinal fluid (CSF) has not been well defined. In this study, the opsonic activity of normal CSF for laboratory and blood culture isolates of Staphylococcus aureus, Streptococcus pneumoniae, Escherichia coli, Hemophilus influenzae type b, and Neisseria meningitidis was measured by a quantitative assay employing radiolabeled bacteria and polymorphonuclear leukocytes. All isolates of S. aureus, except the Wood 46 strain, were opsonized in undiluted CSF (>50% uptake by polymorphonuclear leukocytes.) There was heat-stable and heat-labile opsonic activity in CSF for S. aureus. Only one blood culture isolate of E. coli was moderately well opsonized in undiluted CSF (26% uptake). None of the remaining laboratory or clinical isolates were opsonized in undiluted CSF. The S. aureus isolates were more readily opsonized in dilute normal serum than were the other bacterial species, and complement appeared to be the heat-labile opsonin in serum. However, complement may not be the heat-labile opsonin in normal CSF for S. aureus. In contrast to serum, complement C3 was not visualized on the staphylococcal cell surface by immunofluorescence microscopy and chelation of CSF did not diminish opsonic activity. This study demonstrates that normal CSF is opsonic for S. aureus but not for bacterial species that more commonly cause meningitis. These species differences in opsonic requirements may be important in the pathogenesis of meningitis.
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PMID:Opsonic activity of normal human cerebrospinal fluid for selected bacterial species. 4 89

Pneumococcal meningitis, because of their frequency and their severity, are regarded as an important problem of Public Health in Africa. In a great number of African countries, particularly Equatorial and Central Africa, the pneumococcus is the first agent of bacterial meningitis. The annual prevalence is estimated as about 14/100 000 persons. The case fatality rate (on 1 600 cases) is 49,5% ; the annual mortality reaches about 7/100 000 (28 000 annual deaths in Africa). The babies and the old persons are more exposed to the risk, with an annual prevalence of 28,5/100 000 before five years old, and of 16,1/100 000 after sixty years old. The risk is small between five and forty five years old. The risk is very high in patients homozygous for sickle-cell disease. The spread of all detected serotypes, by descending frequency is : 1, 5, 6, 3, 23, 12, 2, 14, 9, 18, 19, 4, 8, 29, 40, others (Danish system of nomenclature). The distribution according to age is indicated by the authors. A vaccine with only 8 serotypes (1, 5, 6, 3, 23, 12, 2, 14) could cover 80% of serotypes in Dakar. For the babies, addition to pneumococcal vaccine with polyribose phosphate of Haemophilus influenzae b, could be useful, because high prevalence of meningitis with this germ before five years old in Africa.
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PMID:[Epidemiologic features of pneumococcal meningitis in Africa. Clinical and serotypical aspects (author's transl)]. 4 37

An in vitro test system was used to compare the antimicrobial activity of erythromycin, amoxicillin and ampicillin against respiratory tract pathogens isolated from man. The minimum inhibitory concentrations (MICs) of fresh clinical isolates of Streptoccus pyogenes, Streptocuccus pneumoniae, Staphylococcus aureus and Haemophilus influenzae to the macrolide and penicillins ranged between 0.01 and 0.9 microgram/ml. The microbes were exposed to each antibiotic for approximately 3 h at 1x,2x and 5x the relevant MIC. Irreversible surface defects and intracellular lesions were resolved by scanning and transmission electron microscopy in all antibiotic-treated bacterial species, irrespective of the antimicrobial used. In each case, inhibition of growth was recorded by turbometric assay; no significant difference was observed among the declining slopes of post-dosing growth curves for either erythromycin-, amoxicillin- or ampicillin-treated pathogens. The experimental observations show that the onset of antimicrobial activity and the bactericidal effectiveness of equipotent concentrations of erythromycin, amoxicillin and ampicillin were comparable in this study. The results complement previous clinical, bacteriologic and ultrastructure studies in vivo and demonstrate the contribution of the combined in vivo/in vitro study design for better understanding of antimicrobial activity in human respiratory tract infections.
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PMID:Comparative study of erythromycin, amoxicillin and ampicillin antimicrobial activity against human respiratory tract pathogens. 4 65

Sixty patients with pneumonia and/or bronchitis were treated with cefaclor, a new orally administered cephalosporin. Of those 60, 27 adults were treated with 500 mg every 8 hours, 26 adults with 250 mg every 6 hours, and 7 children with 50 mg/kg/day. In the adults, pneumonia was caused most frequently by Streptococcus pneumoniae and Haemophilus influenzae. The 7 children had pneumococcal pneumonia. All but 2 adults, both elderly patients with chronic obstructive pulmonary disease, were successfully treated. One instance of drug hypersensitivity occurred. All 7 children responded rapidly, with no side effects, to cefaclor therapy.
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PMID:Treatment of acute bacterial bronchitis and pneumonia with cefaclor. 4 8

The in vitro activity of cefaclor was compared with that of cephalexin and cephradine. This new antibiotic was the most active of the oral agents against Haemophilus influenzae (especially non-beta-lactamase producing strains). It was also significantly more active against N. gonorrhoeae and the Enterobacteriaceae. The instability in agar raises some issues that need further study.
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PMID:Comparative in vitro microbiological activity and stability of cefaclor. 4 10

A comparative study was conducted on the in vitro activity of cefaclor and other oral cephalosporins against a large number of freshly isolated clinical strains of gram-negative and gram-positive bacteria. The activity of cefaclor against gram-positive pathogens is very similar to that of cephalexin. The action of cefaclor against Streptococcus pneumoniae is superior. Cefaclor is the most active antibiotic against strains of Haemophilus influenzae, and is also more active than cephalexin and cephradine against non-beta-lactamase producing strains of Escherichia coli, Klebsiella species and Proteus mirabilis.
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PMID:[In vitro activity of cefaclor (author's transl)]. 4 87

Laboratory aspects of cefaclor, a new orally-effective cephalosporin antibiotic, are summarized. On the basis of data from a variety of studies, the useful antibacterial spectrum of cefaclor is shown to include all classes of bacteria that are generally susceptible to cephalothin and cephalexin. Cefaclor has a significant potency advantage over cephalexin against many Enterobacteriaceae, Haemophilus sp. and Streptococcus pneumoniae. Bacteria that are susceptible to cefaclor are killed by concentrations at or near the inhibitory concentration. In vitro enzymatic hydrolysis experiments have shown that cefaclor is a relatively good substrate for several beta-lactamases. Orally administered cefaclor is effective in protection of mice from the lethal effects of intraperitoneal challenges with cefaclor-susceptible bacteria. The chemical instability of cefaclor, test medium composition and inoculum density influence the results of in vitro susceptibility tests with cefaclor. Methods for routine susceptibility testing are described.
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PMID:Summary of laboratory studies on the antibacterial activity of cefaclor. 4 88

A limited review of the changes in susceptibility of common bacterial pathogens to available antibacterial agents is presented. Significant developments in recent years include the following: (1) the emergence of Streptococcus pneumoniae with decreased resistance to penicillin and of some strains resistant to several antibiotics; (2) a decline in prevalence of multi-drug-resistant Staphylococcus aureus after 1960 following their increasing prevalence in the preceding years (these changes were methicillin-resistant (and multi-drug-resistant) S. aureus and the marked differences in their prevalence in different areas (these changes also were related to appearance of new phages in those organisms); (4) an increasing resistance to multiple drugs among enterococci but not among viridans streptococci or among nonenterococcal group D streptococci; (5) the emergence of beta-lactamase-producing Neisseria gonorrhoeae; (6) the emergence and spread of sulfonamide-resistant Neisseria meningitidis; (7) the occurrence of beta-lactamase-producing strains of Haemophilus influenzae and occasional strains resistant to chloramphenicol; (8) the focal occurrence of chloramphenicol-resistant Salmonella typhi in Vietnam and in epidemic form in Mexico; (9) the demonstration of marked differences in prevalence of resistance to multiple drugs in common pathogens to the most widely used antibiotics in different geographic areas. The dominant factor in the emergence and spread of antibiotic-resistant bacterial pathogens, whether in hospital wards or in the community, is clearly the intensive use of the antibiotic agents to which resistance emerges and then spreads.
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PMID:Emergence of antibiotic resistance in hospitals, 1935-1975. 4 21

Ampicillin-resistant Haemophilus influenzae type B have been reported only during the past year. Five clinical isolates from the U.S. and Germany all had the TEM-type beta-lactamase which is known to be transferred widely among other gram-negative bacilli. Unlike those bacilli, however, the H. influenzae cell had very little barrier to entry of penicillins. This greater permeability of the H. influenzae cell to penicillins appeared to reduce the protective effect of its beta-lactamase, in that acquisition of the TEM-type beta-lactamase increased levels of resistance to penicillins much less for individual cells of H. influenzae than for those of Escherichia coli. Large inocula of either species appeared highly resistant. The unusually low level of resistance of individual cells of H. influenzae containing the TEM-type beta-lactamase may have delayed their emergence or recognition, and has unresolved clinical implications.
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PMID:Ampicillin-resistant Haemophilus influenzae type B possessing a TEM-type beta-lactamase but little permeability barrier to ampicillin. 4 83


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