Numerical comparisons of bioassay methods in estimating LC50

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.

Grantor dc:publisher

Kansas State University

Year dc:date.issued

2010

Author dc:creator

• Zhou, Tianhong

• LC50
• Bioassay

Statement dc:rights

• © the author. This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/2097/4638

OAI record oai:identifier

https://krex.k-state.edu/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Akrex.k-state.edu%3A2097%2F4638