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Pathogenic leptospiras isolated from Malaysian surface waters.

A D Alexander, L B Evans, M F Baker

    Applied Microbiology
    |January 1, 1975
    PubMed
    Summary

    This study identified 29 pathogenic Leptospira serovars in Malaysian natural environments, including two previously undiscovered in the region. These findings highlight the diverse Leptospira populations in tropical ecosystems.

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    Area of Science:

    • Microbiology
    • Environmental Science
    • Epidemiology

    Background:

    • Leptospira are pathogenic bacteria found in diverse environments worldwide.
    • Malaysia's tropical climate and abundant wildlife create potential reservoirs for Leptospira.
    • Previous studies indicated a variety of Leptospira serovars in Malaysia, particularly in jungle environments.

    Purpose of the Study:

    • To characterize the diversity of pathogenic Leptospira serovars in natural water and soil samples from Malaysia.
    • To identify any novel serovars or serovars not previously reported in Malaysia.

    Main Methods:

    • Isolation and identification of Leptospira from environmental samples.
    • Serological characterization of isolated Leptospira strains.
    • Comparison of identified serovars with existing global and regional databases.

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    Main Results:

    • A total of 1,424 pathogenic Leptospira strains were isolated.
    • These strains represented 29 distinct serovars.
    • Two serovars, 'werrasingha' and a newly designated 'evansi', were identified for the first time in Malaysia.
    • Serovar 'evansi' showed serological similarities to 'ranarum', previously found in a frog in Iowa.
    • A high diversity of serovars was observed in jungle-sourced isolates.

    Conclusions:

    • Malaysia harbors a significant diversity of pathogenic Leptospira serovars in its natural environments.
    • The continuous emergence of new serovars underscores the need for ongoing surveillance.
    • Findings are consistent with previous observations of diverse serovar infections in individuals exposed to Malaysian jungles.