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Query: UMLS:C0348321 (Haemophilus)
 15,372 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Annual ampicillin susceptibility rates for Haemophilus influenzae isolates at the St. Paul-Ramsey Medical Center gradually decreased from 100% in 1974 to 83.3% in 1980 and then remained stable at 88.90%. Penicillin susceptibility rates were similar to those for ampicillin. Ampicillin rates were source dependent: eye 95%, respiratory 90%, miscellaneous sources 82%, and blood and CSF 80%. Rates for Haemophilus parainfluenzae varied and showed no trend. H. parainfluenzae isolates were distinctly less susceptible to penicillin (70%) than to ampicillin (96%). H. influenzae isolates were highly susceptible to chloramphenicol (99.6%) and tetracycline (97.5%), with the latter also showing source dependency. Characterization of isolates for colony morphology and hemolysis showed no clinical relevancy. Ampicillin and penicillin MICs were determined for 128 clinical isolates saved in stock culture during 1978-1983. All 19 resistant isolates (MIC greater than or equal to 4 micrograms/mL) were resistant to both penicillin and ampicillin and produced beta-lactamase. Eight had penicillin MICs of 1 or 2 micrograms/mL and three had ampicillin MICs of 1 or 2 micrograms/mL. The significance of isolates with MICs of 1-2 micrograms/mL is discussed in relation to our findings and a review of the literature.
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PMID:Antimicrobial resistance in Haemophilus isolates: a Minnesota experience and literature review. 638 Feb 70

Despite the availability of numerous beta-lactam antibiotics, benzylpenicillin remains the most important beta-lactam antibiotic in the treatment of bacterial endocarditis. Penicillin alone and in combination with an aminoglycoside is effective in the treatment of endocarditis due to all streptococci, Streptococcus pneumoniae, penicillin-susceptible Staphylococcus aureus, Haemophilus aprophilus, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Listeria monocytogenes. Oral phenoxymethylpenicillin in combination with streptomycin is effective in treating endocarditis due to viridans streptococci. Ampicillin is effective in endocarditis due to Haemophilus influenzae, H. parainfluenzae, H. paraphrophilus, Listeria monocytogenes and Escherichia coli. Oral amoxicillin with gentamicin has been used to treat enterococcal endocarditis. The penicillinase-resistant penicillins are effective in treating S. aureus endocarditis. Carbenicillin or ticarcillin in combination with tobramycin or gentamicin are used to treat endocarditis due to Serratia marcescens and Pseudomonas aeruginosa. The use of piperacillin in combination with tobramycin against P. aeruginosa endocarditis has been associated with failure and increased resistance. The cephalosporins have been used to treat endocarditis caused by susceptible organisms. There have been few data on the efficacy of the newer cephalosporins in treating endocarditis. They have been used to treat septicaemia due to susceptible organisms with good results.
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PMID:The use of beta-lactam antibiotics in the treatment of septicaemia and endocarditis. 644 9

In this introductory presentation, the bacteriology of acute otitis media, sinusitis and orofacial infections is surveyed, and recent data on antibiotic resistance of the most common pathogenic bacteria are reported. In addition, the difference in the immunogenic effect of capsular polysaccharides from pneumococci and Haemophilus influenzae in children of different ages is mentioned. In acute otitis media and sinusitis, pneumococci and H. influenzae are the most common isolates followed in frequency by Branhamella catarrhalis and streptococci group A. It should be emphasized that the average relative risk of otitis media with effusion is much higher in children with viral respiratory infections than in children with nasopharyngeal colonization with pneumococci or H. influenzae. Anaerobic bacteria are the most common causes of odontogenic infections. Penicillin remains the most active of the currently available antibiotics against streptococci group A. Resistance to penicillin of clinical isolates has still not been documented, although resistance may occur to erythromycin and tetracycline. In pneumococci isolates obtained in Sweden, a relative resistance to penicillin occurs in a low percentage. They may also be resistant to erythromycin and tetracycline. The frequency of beta-lactamase producing H. influenzae has been followed nation-wide in Sweden during recent years. The mean frequency varies around 3-4% with local and seasonal peaks up to 12%. The majority of the H. influenzae isolates in Sweden are not fully sensitive to erythromycin, but resistance to chloramphenicol occurs. Most strains (including beta-lactamase producing) are sensitive to co-trimoxazole, cefuroxime, cefotaxime, cefotriaxone and cefaclor. Over 40% of clinical isolates of B. catarrhalis in Sweden produce beta-lactamase.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Bacteriological aspects of infections of the upper respiratory tract. 658 Jul 37

Of 30 patients with pneumonia due to Haemophilus influenzae, 26 had infection due to nontypable and 4 due to typable organisms. Biotype I isolates were implicated with surprising frequency. Blood cultures were positive in six patients. An additional 14 patients, all with nontypable H. influenzae infection, had febrile purulent tracheobronchitis that was clinically indistinguishable from pneumonia except for the absence of a radiographic infiltrate; none were bacteremic. Penicillin susceptibility was shown for 95% of isolates, and response to ampicillin was prompt. Patients had high serum levels of bactericidal antibody on admission but had lower levels of serum opsonizing activity against their own organism than did uninfected carriers with chronic bronchitis; 2 to 3 weeks later, levels of opsonizing antibody had risen to equal those of carriers. Deficient opsonizing activity may have contributed to susceptibility to infection. These findings identify both host and bacterial factors that may cause susceptibility to pulmonary infection from H. influenzae.
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PMID:Pneumonia and acute febrile tracheobronchitis due to haemophilus influenzae. 660 4

Polyvalent pneumococcal vaccine and oral penicillin prophylaxis are frequently used in patients with functional or anatomic asplenia to protect them from fulminant Streptococcus pneumoniae sepsis. We studied nasopharyngeal colonization with pneumococci in 34 patients with sickle cell anemia (aged 6 months to 5 years) receiving penicillin prophylaxis and in 63 age- and race-matched comparison patients. Patients with sickle cell anemia had fewer positive initial pneumococcal nasopharyngeal cultures than did the comparison group (14.5% vs 34.4%, P = 0.03) and significantly lower carriage rates during the respiratory illness season of November to March (8.7% vs 40.5%, P = 0.005). Penicillin prophylaxis did not result in emergence of penicillin-resistant pneumococci or in an increased carriage rate of Haemophilus influenzae type b. Our data suggest a mechanism of action for penicillin prophylaxis and provide some evidence for the relative safety of this regimen.
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PMID:Effect of penicillin prophylaxis on nasopharyngeal colonization with Streptococcus pneumoniae in children with sickle cell anemia. 669 Jun 71

The effect of peroral penicillin V (55 mg/kg/day) on acute otitis media was investigated in 149 children between the ages of one and ten years in a double-blind, placebo-controlled investigation. The parameters of the disease employed were symptom scores for earache, the use of analgetics, otoscopy, as well as tympanometry. The children were followed up for three months. Penicillin had a significant effect on pain on the second day of treatment. The acute course of the disease was satisfactory in 69% of the children in the placebo group and in 86% in the penicillin group. In patients with pneumococci or hemolytic streptococci in the rhinopharynx, the pain already disappeared after one to two doses of penicillin, whereas the treatment had no effect on the patients with Haemophilus influenzae. There was no difference between the penicillin and placebo groups with regard to the results of otoscopy and tympanometry after one week, one month and three months. No serious complications were observed. It is concluded that an attitude of "masterful inactivity" with regard to the treatment of acute otitis media is justifiable, and in the majority of cases advisable, provided sufficient analgesic treatment is given and also that the patient can be closely followed. As there are still many unanswered questions more controlled investigations are warranted.
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PMID:Penicillin and acute otitis: short and long-term results. 677 24

The effect of peroral penicillin-V (55 mg/kg/day in 7 days) on acute otitis media was studied in 149 children between the ages of 1 and 10 years in a double-blind, placebo-controlled investigation. The parameters of the disease employed were symptom scores for earache, fever and common cold, the use of analgetics, otoscopy, as well as tympanometry. The children were followed-up for 3 months. Penicillin had no effect on fever and common cold, but earache was significantly reduced on the 2nd day of treatment. The acute course of the disease was satisfactory in 69% of the children in the placebo group and in 86% in the penicillin group. In patients with pneumococci or haemolytic streptococci in the nasopharynx, the pain disappeared after 1-2 doses of penicillin, whereas the treatment had no effect in children with Haemophilus influenzae. There was no difference between the penicillin and the placebo groups with regard to the results of otoscopy and tympanometry after 1 week, 1 month and 3 months. No serious complications were observed. It is concluded that an attitude of "masterly inactivity" with regard to the treatment of acute otitis media is justifiable, provided sufficient analgesic treatment is given and also that the patient can be closely followed. As there are still many unanswered questions more controlled investigations are warranted.
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PMID:Penicillin in acute otitis media: a double-blind placebo-controlled trial. 679 64

The ability of penicillins and chloramphenicol to enter human polymorphonuclear leukocytes (PMNLs) and their antibacterial activity against intracellular Haemophilus influenzae type b were studied. Penicillin was excluded whereas chloramphenicol was concentrated in PMNLs; chloramphenicol uptake was not dependent on PMNL energy and was not competitively inhibited by unlabeled drug. PMNLs that had phagocytized opsonized H. influenzae type b were examined after incubation for 24 hr. In the absences of antibiotics, intact intracellular H. influenzae type b organisms were observed in PMNLs by electron microscopy. These PMNLs contained 10(4.5) colony-forming units (cfu) of H. influenzae type b. Addition of penicillin or ampicillin at four, 20, or 40 times the minimal bactericidal concentration (MBC) decreased this density from 10(4.5) to 10(3.5) cfu. In contrast, addition of chloramphenicol at four times the MBC reduced the density to approximately 100 cfu; at 10 times the MBC it reduced the density to approximately 10 cfu. Thus, lipid-soluble antibiotics such as chloramphenicol are concentrated and are bioactive within PMNLs. Such antibiotics may have a significant advantage at the cellular level.
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PMID:Cellular uptake and intracellular activity of antibiotics against Haemophilus influenzae type b. 697 93

A prospective, randomized double-blind study comparing high-dose short-term penicillin-G prophylaxis with placebo was conducted on patients referred for elective pulmonary surgery. The major advantages of penicillin prophylaxis over placebo were observed for wound infections (2/45 vs 9/47, respectively, p = 0.03), postoperative antibiotic use (13/45 vs 23/47, respectively, p = 0.049), and postoperative hospital stay (median 10 days vs 13 days, respectively, p = 0.02). The prophylactic penicillin regimen had no effect on the incidence of empyema or lower respiratory tract infections. Staphylococcus aureus and Haemophilus were identified as the major pathogens in post-operative infections. Penicillin significantly reduced the incidence of S. aureus in spite of resistance to penicillin in most isolated strains, while the frequency of Haemophilus was similar in the two treatment groups. Colonization with Enterobacteriaceae and Pseudomonas aeruginosa was pronounced in the penicillin group. Few side-effects of penicillin treatment were recorded. Short-term penicillin prophylaxis is recommended, but the ideal prophylactic regimen in pulmonary surgery has not yet been found.
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PMID:Antibiotic prophylaxis in pulmonary surgery: a double-blind study of penicillin versus placebo. 703 27

A patient with systemic lupus erythematosus who developed pneumococcal epiglottitis is described and the literature reviewed. This infection is extremely rare in adults, and only 10 cases, none of them with SLE, have so far been reported. Epiglottitis is usually caused by Haemophilus influenzae. However, in immunocompromised hosts the probability of Streptococcus pneumoniae as the infecting agent is considerable. Penicillin should therefore be part of the antimicrobial regimen in such patients.
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PMID:Pneumococcal epiglottitis in systemic lupus erythematosus on high-dose corticosteroids. 714


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