Lymph nodes & spleen, nonlymphoid
Lymph nodes-infectious / parasitic disorders

Topic Completed: 1 July 2013

Minor changes: 21 July 2020

Revised: 1 February 2019, last major update July 2013

Copyright: 2003-2020,, Inc.

PubMed Search: Haemophilus influenzae [title] lymph nodes

Page views in 2019: 198
Page views in 2020 to date: 132
Cite this page: DePond W. Haemophilus. website. Accessed September 30th, 2020.
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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