: a bacterium of the genus Haemophilus (H. influenzae) associated with acute respiratory infections and meningitis compare koch-weeks bacillus
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“Pfeiffer's bacillus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Pfeiffer%27s%20bacillus. Accessed 19 May. 2025.
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