Related Experiment Video
Updated: Aug 3, 2026

06:34
An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers
Published on: December 1, 2017
A 5-year surveillance study of 44,691 isolates of Haemophilus influenzae project Beta-Alert 1993-1997
A Derecola1, D L Butler, R L Kaplan
1Department of Anti-Infectives, SmithKline Beecham Pharmaceuticals, Collegeville, Pennsylvania 19426-0989, USA. ann_m_derecola@sbphrd.com
Antimicrobial Agents and Chemotherapy
|December 31, 1998
Abstract:
Beta-Alert is a surveillance program developed in 1993 to monitor the percentage of beta-lactamase-producing Haemophilus influenzae isolates obtained from specimens submitted to regional commercial laboratories. The results of this study demonstrate that levels of beta-lactamase producers have remained between 31 and 38% in the United States over the past 5 years.

