Sequencing ebola and marburg viruses genomes using microarrays

Area of Science:

• Virology
• Genomics
• Infectious Diseases

Background:

• Ebola and Marburg hemorrhagic fevers are deadly viral diseases with high fatality rates.
• Periodic outbreaks in Africa and the 2014 West Africa Ebola outbreak highlight the global health risk.
• Rapid and precise identification of causative agents is essential for controlling viral hemorrhagic fever outbreaks.

Purpose of the Study:

• To describe and evaluate a sequencing-by-hybridization (SBH) technique for identifying Ebola and Marburg viruses.
• To assess the accuracy and efficiency of high-density microarrays in viral genome interrogation.

Main Methods:

• Utilized high-density microarrays designed for whole-genome sequencing-by-hybridization (SBH).
• Tested the SBH technique on three species of Ebolavirus (Reston, Sudan, Zaire) and three strains of Marburgvirus (Angola, Musoke, Ravn).
• Generated consensus sequences using multiple hybridization events.

Main Results:

• Achieved 92.1-98.9% accuracy across 95-99% of viral genomes with four or more hybridizations.
• Successfully distinguished between different strains of Lake Victoria Marburgvirus.
• Demonstrated the potential of SBH microarrays for rapid viral identification.

Conclusions:

• Sequencing-by-hybridization (SBH) with high-density microarrays is an accurate method for identifying Ebola and Marburg viruses.
• This technique aids in the early detection and containment of viral hemorrhagic fever outbreaks.
• SBH offers a valuable tool for distinguishing between closely related viral strains, crucial for epidemiological surveillance.