1. Murphy, TF, Apicella, MA. Nontypeable Haemophilus influenzae: a review of clinical aspects, surface antigens, and the human immune response to infection. Reviews of Infectious Diseases 1987; 9: 1–15.
2. Saito, M, et al. . Clonal spread of an invasive strain of Haemophilus influenzae type b among nursery contacts accompanied by a high carriage rate of non-disease-associated strains. Journal of Medical Microbiology 2000; 49: 845–847.
3. Felmingham, D, Washington, J. Trends in the antimicrobial susceptibility of bacterial respiratory tract pathogens – findings of the Alexander Project 1992–1996. Journal of Chemotherapy 1999; 11: 5–21.
4. Karlowsky, JA, et al. . Antimicrobial surveillance of Haemophilus influenzae in the United States during 2000–2001 leads to detection of clonal dissemination of a beta-lactamase-negative and ampicillin-resistant strain. Journal of Clinical Microbiology 2002; 40: 1063–1066.
5. Hoban, D, Felmingham, D. The PROTEKT surveillance study: antimicrobial susceptibility of Haemophilus influenzae and Moraxella catarrhalis from community-acquired respiratory tract infections. Journal of Antimicrobial Chemotherapy 2003; 50: 49–59.
6. Suzuki, K, Nishimura, T, Baba, S. Current status of bacterial resistance in the otolaryngology field: results from the Second Nationwide Survey in Japan. Journal of Incfection and Chemotherapy 2003; 9: 46–52.
7. Ubukata, K, et al. . Association of amino acid substitutions in penicillin-binding protein 3 with beta-lactam resistance in beta-lactamase-negative ampicillin-resistant Haemophilus influenzae. Antimicrobial Agents and Chemotherapy 2001; 45: 1693–1699.
8. Hasegawa, K, et al. . Rapidly increasing prevalence of β-lactamase-nonproducing, ampicillin-resistant Haemophilus influenzae type b in patients with meningitis. Antimicrobial Agents and Chemotherapy 2004; 48: 1509–1514.
9.National Committee for Clinical Laboratory Standards. Methods for dilution antimicrobial susceptibility tests for bacteria that grow aerobically. Approved standard M7-A4. Wayne, PA: National Committee for Clinical Laboratory Standards, 1998.
10. Yano, H, et al. . Pulsed-field gel electrophoresis analysis of nasopharyngeal flora in children attending a day care center. Journal of Clinical Microbiology 2000; 38: 625–629.
11. Tenover, FC, et al. . Interpreting chromosomal DNA restriction patterns produced by pulsed-field gel electrophoresis: criteria for bacterial strain typing. Journal of Clinical Microbiology 1995; 33: 2233–2239.
12. Heilmann, KP, et al. . Decreasing prevalence of beta-lactamase production among respiratory tract isolates of Haemophilus influenzae in the United States. Antimicrobial Agents and Chemotherapy 2005; 49: 2561–2564.
13. Dabernat, H, et al. . Haemophilus influenzae carriage in children attending French day care centers: a molecular epidemiological study. Journal of Clinical Microbiology 2003; 41: 1664–1672.
14. Marco, F, et al. . Antimicrobial susceptibilities of 1,730 Haemophilus influenzae respiratory tract isolates in Spain in 1998–1999. Antimicrobial Agents and Chemotherapy 2001; 45: 3226–3228.
15. Seki, H, et al. . Increasing prevalence of ampicillin-resistant, non-beta-lactamase-producing strains of Haemophilus influenzae in children in Japan. Chemotherapy 1999; 45: 15–21.
16. Watanabe, H, et al. . Possible high rate of transmission of nontypeable Haemophilus influenzae, including β-lactamase-negative ampicillin-resistant strains, between children and their parents. Journal of Clinical Microbiology 2004; 42: 362–365.
17. Rennie, RP, Ibrahim, KH. Antimicrobial resistance in Haemophilus influenzae: how can we prevent the inevitable? Commentary on antimicrobial resistance in H. influenzae based on data from the TARGETed surveillance program. Clinical Infectious Diseases 2005; 41 (Suppl. 4): S234–S238.