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Last updated on February 26, 2025.

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Complaint casebook Udon with mold growing

1.Overview

Some of the udon I bought was discolored black.

Photo of the udon with mold growing
Udon with mold growing

Image of a mold micrograph
Micrograph of mold

Image of an electron microscopy of mold
Electron micrograph of mold


2.Test results

  • Culture media: Potato dextrosse agar
  • Growth: Slow
  • Form: Wool-like wetness
  • Color: Black brown

3.Conclusion

It was presumed to be a mold of the genus Phoma.

4.Reference

 Phoma genus is a mold that is often detected in food and living environments, but it is originally a plant pathogenic that parasitizes plant leaves, stem branches, and roots, and its alterations are suspended in the air, so it can be easily collected by the drop method. In rare cases, it also parasitizes humans.

Published on March 8, 2007

Inquiries to this page

Microbial Inspection and Research Division, Medical Care Bureau Institute of Health

Phone: 045-370-9379

Phone: 045-370-9379

Fax: 045-370-8462

E-Mail address ir-eiken@city.yokohama.lg.jp

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Page ID: 623-218-655

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