title: vFitness: a web-based computing tool for improving estimation of in vitro HIV-1 fitness experiments.
abstract: BACKGROUND
  The replication rate (or fitness) between viral variants has been investigated in vivo and in vitro for human immunodeficiency virus (HIV). HIV fitness plays an important role in the development and persistence of drug resistance. The accurate estimation of viral fitness relies on complicated computations based on statistical methods. This calls for tools that are easy to access and intuitive to use for various experiments of viral fitness.
  
  
  RESULTS
  Based on a mathematical model and several statistical methods (least-squares approach and measurement error models), a Web-based computing tool has been developed for improving estimation of virus fitness in growth competition assays of human immunodeficiency virus type 1 (HIV-1).
  
  
  CONCLUSIONS
  Unlike the two-point calculation used in previous studies, the estimation here uses linear regression methods with all observed data in the competition experiment to more accurately estimate relative viral fitness parameters. The dilution factor is introduced for making the computational tool more flexible to accommodate various experimental conditions. This Web-based tool is implemented in C# language with Microsoft ASP.NET, and is publicly available on the Web at http://bis.urmc.rochester.edu/vFitness/.
authors.affiliation: Department of Biostatistics and Computational Biology, School of Medicine and Dentistry, University of Rochester, Rochester, NY 14642, USA. jma@bst.rochester.edu
authors.forename: Jingming
authors.initials: J
authors.lastname: Ma
authors.forename: Carrie
authors.initials: C
authors.lastname: Dykes
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
authors.forename: Yangxin
authors.initials: Y
authors.lastname: Huang
authors.forename: Lisa
authors.initials: L
authors.lastname: Demeter
authors.forename: Hulin
authors.initials: H
authors.lastname: Wu
mesh_terms: D003198:Computer Simulation; D015497:HIV-1 / Q000254:growth & development*; D020407:Internet; D016014:Linear Models; D012984:Software