Related Experiment Video
Updated: Aug 10, 2026
Isolation of Viral Replication Compartment-enriched Sub-nuclear Fractions from Adenovirus-infected Normal Human Cells
Published on: November 12, 2015
Comparison of neutralization and DNA restriction enzyme methods for typing clinical isolates of human adenovirus
Abstract:
Sixty-five adenovirus isolates collected over a 3.5-year period were typed by both standard microneutralization techniques and restriction endonuclease digestion of viral DNA. Of the 65 isolates, 47 (72.3%) representing six adenovirus types could be typed by microneutralization. Eighteen isolates demonstrated partial neutralization with standard antisera to two or more adenovirus serotypes and thus could not be definitively typed. DNA analysis permitted typing of 64 of the 65 isolates (98.5%) (including four isolates which contained mixtures of two adenovirus types), and 12 different types were identified. Neutralization and DNA typing disagreed for five isolates, and in each case, digestion with multiple restriction endonucleases and DNA hybridization studies were consistent with the type assigned by DNA analysis. In addition, the DNA analysis method allowed the identification of genomic variants (genome types) of five adenovirus types. We conclude that typing clinical isolates of adenovirus by restriction endonuclease digestion of viral DNA can be done rapidly, provides additional epidemiological and typing information, and provides fewer ambiguous results than does typing by neutralization.
Insights
Restriction endonuclease digestion of viral DNA offers a superior method for adenovirus typing compared to microneutralization. This DNA analysis technique rapidly identifies more adenovirus types and provides clearer results for clinical isolates.
Area of Science:
- Virology
- Molecular Biology
- Infectious Diseases
Background:
- Accurate adenovirus typing is crucial for epidemiological surveillance and clinical management.
- Traditional microneutralization techniques can yield ambiguous results, hindering definitive identification of adenovirus types.
Purpose of the Study:
- To compare the efficacy of restriction endonuclease digestion of viral DNA with standard microneutralization for typing clinical adenovirus isolates.
- To evaluate the diagnostic yield and accuracy of DNA-based typing methods for adenovirus.
Main Methods:
- Adenovirus isolates were analyzed using both microneutralization assays and restriction endonuclease digestion of viral DNA.
- DNA hybridization studies were employed to resolve discrepancies between the two typing methods.
Main Results:
- Restriction endonuclease digestion identified 12 adenovirus types from 64 of 65 isolates (98.5%), including mixed infections.
- Microneutralization successfully typed only 47 isolates (72.3%), with 18 showing ambiguous results.
- DNA analysis provided more definitive typing and identified genomic variants, resolving discrepancies with neutralization.
Conclusions:
- Restriction endonuclease digestion of viral DNA is a rapid, accurate, and less ambiguous method for typing clinical adenovirus isolates.
- This DNA-based approach offers enhanced epidemiological and diagnostic information compared to microneutralization.
- The study highlights the advantages of molecular techniques for precise viral identification.
