Optimization of in situ hybridization protocols for detection of feline herpesvirus 1

Area of Science:

• Veterinary Pathology
• Molecular Diagnostics
• Virology

Background:

• Feline herpesvirus 1 (FHV-1) is a common cause of ocular and respiratory disease in cats.
• Accurate detection of FHV-1 in tissue samples is crucial for diagnosis and disease management.
• In situ hybridization (ISH) is a valuable technique for localizing viral nucleic acids within tissue sections.

Purpose of the Study:

• To develop and optimize an in situ hybridization (ISH) protocol for detecting feline herpesvirus 1 (FHV-1).
• To compare the efficacy of microwave pre-treatment versus protease digestion for enhancing FHV-1 detection via ISH.
• To evaluate the suitability of these pre-treatment methods for formalin-fixed, paraffin-embedded (FFPE) tissues.

Main Methods:

• Development of an in situ hybridization (ISH) protocol.
• Application of microwave irradiation as a pre-treatment method.
• Comparison of microwave pre-treatment with protease digestion pre-treatment.
• Assessment of FHV-1 detection in formalin-fixed, paraffin-embedded (FFPE) feline tissues.

Main Results:

• Microwave pre-treatment yielded optimal results for FHV-1 detection compared to protease digestion.
• The optimized ISH protocol demonstrated enhanced sensitivity and specificity.
• Effective detection was achieved even in long-term formalin-fixed, paraffin-embedded tissues.

Conclusions:

• Microwave pre-treatment is a highly effective method for enhancing ISH detection of FHV-1.
• This technique is particularly beneficial for analyzing archival FFPE tissues.
• The findings recommend incorporating microwave irradiation into routine ISH protocols for FHV-1 diagnosis.