Numerical comparisons of bioassay methods in estimating LC50

Date

2010-08-13T16:17:50Z

Journal Title

Journal ISSN

Volume Title

Publisher

Kansas State University

Abstract

The potency of a pesticide or some materials is widely studied in agricultural and biological fields. The level of a stimulus that results in a response by 50% of individuals in a population under study is an important characterizing parameter and it is denoted by the median lethal concentration (LC50) or the median lethal dose (LD50) or median. Estimation of LC50 is a type of quantal response assays that belong to qualitative indirect bioassays. In this report, seven methods of estimating LC50 are reviewed with reference to two normal distributions of tolerance in four different cases. Some modified methods are also discussed. Simulation shows that the maximum likelihood method generally outperforms all other traditional methods, if the true tolerance distribution is available. The comparison results indicate that the modified Dragstedt-Behrens method and modified Reed-Muench method are good substitutes for the original ones in most scenarios.

Description

Keywords

LC50, Bioassay

Graduation Month

August

Degree

Master of Science

Department

Department of Statistics

Major Professor

Weixing Song

Date

2010

Type

Report

Citation