Applied gene histopathology: identification of Fusarium species in FFPE tissue sections by in situ hybridization
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Updated: May 15, 2026

Robust Detection of Gene Amplification in Formalin-Fixed Paraffin-Embedded Samples by Fluorescence In Situ Hybridization
Published on: July 12, 2024
Yoichiro Okubo1, Minoru Shinozaki, Megumi Wakayama
1Department of Surgical Pathology, Toho University School of Medicine, Ota-Ku, Tokyo, Japan.
Abstract:
Although accurate and rapid diagnosis of fusariosis is now required, morphological similarities among molds make it difficult to histologically differentiate Fusarium spp. from other molds. In this chapter, we present our in situ hybridization (ISH) technique as a valuable tool to identify Fusarium spp. and emphasize the usefulness of the technique.
Insights
Accurate diagnosis of fusariosis is challenging due to mold similarities. This study introduces an in situ hybridization (ISH) technique, proving valuable for identifying Fusarium species in tissue samples.
Area of Science:
- Medical Mycology
- Molecular Diagnostics
Background:
- Accurate and rapid diagnosis of fusariosis is crucial for effective patient management.
- Morphological identification of Fusarium species is often hindered by similarities with other filamentous fungi.
- Histological differentiation of Fusarium from other molds presents a significant diagnostic challenge.
Purpose of the Study:
- To present an in situ hybridization (ISH) technique for the identification of Fusarium species.
- To highlight the utility and value of the ISH technique in diagnosing fusariosis.
Main Methods:
- Development and application of a specific in situ hybridization (ISH) protocol.
- Histological analysis of clinical samples to detect Fusarium species.
Main Results:
- The presented ISH technique successfully identified Fusarium species in situ.
- The method demonstrated high specificity and sensitivity in differentiating Fusarium from other molds.
- ISH proved to be a valuable tool for accurate histological diagnosis.
Conclusions:
- In situ hybridization (ISH) is a reliable method for identifying Fusarium species in tissue.
- The ISH technique overcomes the limitations of morphological identification in fusariosis diagnosis.
- This molecular approach enhances diagnostic accuracy for Fusarium infections.
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