Second serogroup of Legionella hackeliae isolated from a patient with pneumonia

J Clin Microbiol. 1985 Oct;22(4):488-9. doi: 10.1128/jcm.22.4.488-489.1985.


A Legionella-like organism (strain 798-PA-H, ATCC 35999) isolated from a lung aspirate was shown by DNA hybridization to belong to the species Legionella hackeliae. Growth, gas-liquid chromatographic, and physiologic characteristics were consistent with those of the type strain of L. hackeliae, Lansing 2 (ATCC 35250). However, 798-PA-H was minimally reactive with L. hackeliae direct immunofluorescence assay conjugate or slide agglutination test antiserum. Cross-absorption studies with 798-PA-H and Lansing 2 antisera supported placing 798-PA-H in a second serogroup of L. hackeliae.

Publication types

  • Case Reports

MeSH terms

  • Agglutination Tests
  • DNA, Bacterial / analysis
  • Female
  • Humans
  • Legionella / classification
  • Legionella / isolation & purification*
  • Legionella / physiology
  • Legionnaires' Disease / microbiology*
  • Middle Aged
  • Nucleic Acid Hybridization
  • Pneumonia / microbiology*
  • Serotyping


  • DNA, Bacterial