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Related Experiment Videos

Balamuthia mandrillaris from soil samples.

Thelma H Dunnebacke1, Frederick L Schuster1, Shigeo Yagi1

  • 1State of California Department of Health Services, Viral and Rickettsial Disease Laboratory, 850 Marina Bay Parkway, Richmond, CA 94804, USA.

Microbiology (Reading, England)
|September 7, 2004
PubMed
Summary
This summary is machine-generated.

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Balamuthia mandrillaris, a cause of fatal granulomatous amoebic encephalitis, has been identified in environmental soil samples. This confirms the amoeba

Area of Science:

  • Microbiology
  • Environmental Science
  • Pathogen Discovery

Background:

  • Balamuthia mandrillaris causes granulomatous amoebic encephalitis, a typically fatal disease.
  • Previously found in animals and humans globally, its environmental presence was unconfirmed.
  • A prior study identified Balamuthia in soil from a child's home; this study expands on that.

Purpose of the Study:

  • To confirm the environmental isolation of Balamuthia mandrillaris.
  • To compare environmental isolates with a clinical isolate from a patient.
  • To characterize the environmental Balamuthia isolates.

Main Methods:

  • Isolation of amoebas from two distinct soil samples.
  • Cultivation and growth requirement analysis.

Related Experiment Videos

  • Immunological testing against anti-Balamuthia serum.
  • Antimicrobial sensitivity testing.
  • 16S rRNA gene sequence analysis.

    • Main Results:

    • Two environmental amoeba isolates were obtained from soil samples.
    • Sequence analysis and immunological tests confirmed both environmental isolates as Balamuthia mandrillaris.
    • The environmental isolates were consistent with the clinical isolate from a child.

    Conclusions:

    • Balamuthia mandrillaris can be found in environmental soil.
    • Environmental isolation supports the free-living status of Balamuthia.
    • This finding has implications for understanding transmission and prevention.