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Clinical Microbiology Reviews, April 2007, p. 368-389, Vol. 20, No. 2
0893-8512/07/$08.00+0     doi:10.1128/CMR.00040-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Antimicrobial Resistance in Haemophilus influenzae

Stephen Tristram,1* Michael R. Jacobs,2 and Peter C. Appelbaum3

School of Human Life Science, University of Tasmania, Launceston, Australia,1 Case Western Reserve University School of Medicine, Cleveland, Ohio,2 Hershey Medical Center, Hershey, Pennsylvania3

Haemophilus influenzae is a major community-acquired pathogen causing significant morbidity and mortality worldwide. Meningitis and bacteremia due to type b strains occur in areas where the protein-conjugated type b vaccine is not in use, whereas nontypeable strains are major causes of otitis media, sinusitis, acute exacerbations of chronic bronchitis, and pneumonia. Antibiotic resistance in this organism is more diverse and widespread than is commonly appreciated. Intrinsic efflux resistance mechanisms limit the activity of the macrolides, azalides, and ketolides. ß-Lactamase production is highly prevalent worldwide and is associated with resistance to ampicillin and amoxicillin. Strains with alterations in penicillin binding proteins, particularly PBP3 (ß-lactamase negative ampicillin resistant and ß-lactamase positive amoxicillin-clavulanate resistant), are increasing in prevalence, particularly in Japan, with increasing resistance to ampicillin, amoxicillin, amoxicillin-clavulanate, and many cephalosporins, limiting the efficacy of expanded-spectrum cephalosporins against meningitis and of many oral cephalosporins against other diseases. Most strains remain susceptible to the carbapenems, which are not affected by penicillin binding protein changes, and the quinolones. The activity of many oral agents is limited by pharmacokinetics achieved with administration by this route, and the susceptibility of isolates based on pharmacokinetic and pharmacodynamic parameters is reviewed.

* Corresponding author. Mailing address: School of Human Life Sciences, University of Tasmania, Locked Bag 1320, Launceston 7250, Australia. Phone: 61 3 63 245469. Fax: 61 3 63 243995. E-mail: Stephen.Tristram{at}utas.edu.au

Clinical Microbiology Reviews, April 2007, p. 368-389, Vol. 20, No. 2
0893-8512/07/$08.00+0     doi:10.1128/CMR.00040-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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  • Morrissey, I., Maher, K., Williams, L., Shackcloth, J., Felmingham, D., Reynolds, R., on behalf of the BSAC Working Parties on Resistanc, (2008). Non-susceptibility trends among Haemophilus influenzae and Moraxella catarrhalis from community-acquired respiratory tract infections in the UK and Ireland, 1999-2007. J Antimicrob Chemother 62: ii97-ii103 [Abstract] [Full Text]  
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