Refining Viral Production Estimation

Area of Science:

• Aquatic microbial ecology
• Virology
• Environmental microbiology

Background:

• Viral activity significantly impacts aquatic ecosystems by influencing bacterial mortality and lysogeny.
• The viral production assay is crucial for assessing these viral impacts.
• Current methods, linear regression and VIPCAL, have limitations in accurately estimating viral production rates.

Purpose of the Study:

• To compare the accuracy of linear regression and VIPCAL methods for estimating viral production rates.
• To develop an improved method (VIPCAL-SE) for more precise viral production rate estimations.
• To enhance the standardization of viral production assays in aquatic viral ecology.

Main Methods:

• A literature survey identified common methods (linear regression and VIPCAL) used in 89 viral production studies.
• Comparative evaluation of linear regression and VIPCAL for estimating lytic and lysogenic viral production rates.
• Development of VIPCAL-SE by incorporating standard error of the means and bacterial net generation time.

Main Results:

• Significant differences were observed between linear regression and VIPCAL in estimating viral production rates.
• VIPCAL-SE demonstrated improved accuracy by accounting for biological variability and potential secondary infections.
• The VIPCAL-SE method is now integrated into the viralprod R package.

Conclusions:

• Existing methods for viral production rate estimation show significant discrepancies.
• VIPCAL-SE offers a more robust and accurate approach for quantifying viral production in aquatic environments.
• The viralprod R package with VIPCAL-SE facilitates standardized and reliable measurements in aquatic viral ecology.