Lymph nodes - not lymphoma
Infectious / parasitic disorders
Haemophilus influenzae

Topic Completed: 1 July 2013

Revised: 1 February 2019, last major update July 2013

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Haemophilus influenzae [title] lymph nodes

Page views in 2018: 94
Page views in 2019 to date: 139
Cite this page: DePond W. Haemophilus influenzae. website. Accessed September 23rd, 2019.
Definition / general
  • Common infection in patients with agammaglobulinemia, who are prone to infection by encapsulated organisms
  • Other common causes of infectious lymphadenopathy in children are Staph and Strep species
  • Culture on chocolate agar
Case reports
Microscopic (histologic) description
  • Enlarged node with dense collagenous stroma containing scattered lymphocytes and occasional neutrophils
  • Epithelioid granulomas with occasional multinucleated giant cells
  • No necrosis
  • No organisms identified with special stains
Microscopic (histologic) images

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Patient with agammaglobulinemia

Electron microscopy images

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Rod with capsule

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