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Legionnaires' disease in Port Elizabeth

T W Randall, P Naidoo, K A Newton

    South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
    |July 5, 1980
    PubMed
    Summary
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    Legionnaires' disease, a bacterial infection, was diagnosed in eight Port Elizabeth adults. Some patients presented with unusual symptoms, highlighting the need for better diagnostic methods for this pneumonia-causing bacterium.

    Area of Science:

    • Medical Microbiology
    • Infectious Diseases
    • Clinical Medicine

    Background:

    • Legionnaires' disease is a severe bacterial pneumonia caused by Legionella species.
    • Diagnosis often relies on serological methods, including indirect fluorescent antibody (IFA) testing.
    • Previous studies have documented clinical presentations and diagnostic challenges.

    Observation:

    • Eight adult patients in Port Elizabeth exhibited high indirect fluorescent antibody titres (≥256) against Legionnaires' disease bacterium.
    • One patient also showed elevated antibodies against Mycoplasma pneumoniae.
    • Clinical presentations varied, including influenza-like illness, pneumonia, and a severe case with encephalopathy, lymphadenopathy, and petechial rash without pneumonia.

    Findings:

    • The study describes a cohort of patients with confirmed Legionnaires' disease based on serological evidence.

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  • Atypical clinical manifestations were observed in some cases, including non-pneumonic presentations with neurological and dermatological signs.
  • Co-infection or concurrent illness with Mycoplasma pneumoniae was noted in one patient.

    • Implications:

    • These findings underscore the diverse clinical spectrum of Legionnaires' disease.
    • The unusual presentations emphasize the importance of considering Legionnaires' disease even in the absence of typical pneumonia symptoms.
    • Improved and more definitive diagnostic procedures are crucial for timely and accurate diagnosis and patient management.