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Cat-scratch disease bacteria.

G Arlet1, Y Perol

  • 1Service de Bactériologie-Virologie, Hôpital Saint-Louis, Paris, France.

Nouvelle Revue Francaise D'Hematologie
|January 1, 1990
PubMed
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Cat-scratch disease is caused by a Gram-negative bacillus found in lymph nodes and organs, particularly in immunocompromised individuals. This pathogen has been observed in vascular nodules resembling Kaposi

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pathology

Background:

  • Cat-scratch disease is a lymphoreticulosis caused by a Gram-negative bacillus.
  • The bacterium is identified via Warthin-Stary silver staining and Brown-Hopp staining.
  • It affects capillary walls and macrophages in lymph nodes, internal organs, and blood cultures.

Purpose of the Study:

  • To describe the characteristics and locations of the bacillus responsible for Cat-scratch disease.
  • To highlight the association of this bacterium with specific lesions in immunocompromised patients.

Main Methods:

  • Histopathological examination using Warthin-Stary silver staining and Brown-Hopp staining.
  • Analysis of samples from lymph nodes, internal organs, blood cultures, and subcutaneous vascular nodules.

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Main Results:

  • The bacillus was identified in regional adenopathy, internal organs, and blood cultures of systemic infections.
  • In immunocompromised patients, particularly those with AIDS, the bacteria were found in subcutaneous vascular nodules.
  • These nodules closely resemble early-stage Kaposi's sarcomas.

Conclusions:

  • The causative agent of Cat-scratch disease is a polymorph bacillus, provisionally listed as G 1492 by the CDC.
  • The bacterium's presence in vascular lesions in AIDS patients warrants consideration in differential diagnosis.