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- W2149790522 abstract "We evaluated the beta-lactamase-producing ability and resistance to 20 antibacterial agents of 448 clinically isolated strains of Haemophilus influenzae accumulated from October 2000 to July 2001 (phase 1) and of 376 different strains accumulated from January to June 2004 (phase 2), from institutions that participated in a nationwide Drug-Resistant Pathogen Surveillance Group in Pediatric Infectious Disease. Between phase 1 and phase 2 the proportion of beta-lactamase-negative ampicillin (ABPC)-susceptible (BLNAS) strains declined from 62.9% to 34.3%; the proportions of beta-lactamase-positive ABPC-resistant (BLPAR) strains were 8.3% and 6.4% in phases 1 and 2, but the proportion of beta-lactamase-negative ABPC-resistant (BLNAR) strains increased from 28.8% in phase 1 to 59.3% in phase 2. Comparison of the MIC(90) values of the antibacterial agents for H. influenzae in phase 1 and phase 2 showed that cefcapene, cefpodoxime, ceftriaxone, panipenem, and clarithromycin kept the same level, while cefdinir, faropenem, and rokitamycin showed 2-fold to 8-fold decreases. With the exception of the above antibiotics, all of the other antibacterial agents tested showed 2-fold to 4-fold increases. The MIC(90) values of the beta-lactam drugs for BLNAR were 2-fold to 32-fold higher than the values for BLNAS. The proportion of BLNAR H. influenzae strains rose dramatically over the 3 years between phases 1 and 2. In relation to age, prior administration of antibacterial agents, and attendance at a day nursery as background factors, no significant differences between BLNAS and BLNAR were detected in phase 1. In the phase 2 survey, the proportion of BLNAR strains showed significant differences between children under 3 years and those aged 3 years or more, and there were also significant differences according to whether antibacterial agents, especially beta-lactams, had been administered previously. No significant difference was found in resistant bacteria according to whether or not a child had attended a day nursery." @default.
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- W2149790522 date "2009-01-01" @default.
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- W2149790522 title "Nationwide survey of the development of drug-resistance in the pediatric field: drug sensitivity of Haemophilus influenzae in Japan" @default.
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- W2149790522 doi "https://doi.org/10.1007/s10156-009-0729-1" @default.
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