Models for microbiological colony counts

Morris, David L. and Ridout, Martin S. (2005) Models for microbiological colony counts. Journal of Agricultural, Biological, and Environmental Statistics, 10 (2). pp. 158-169. ISSN 1085-7117. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Concentrations of microorganisms can be estimated from colony counts at different dilutions. However, complications can occur because of colony overlap or inhibition of colony growth. We develop a model of inhibition in which colonies fail to develop if spores are close to spores of other inhibitory species. The model has three parameters, but a limiting case of the model with only two parameters is shown to be more useful in practice. This latter model, which is a generalized linear model, is fitted to colony counts of the fungus Verticillium dahliae and contrasted with a model suggested in an earlier article.

Item Type: Article
Uncontrolled keywords: count data; dilution; hard-core model; inhibition process; Poisson process; Verticillium dahliae
Subjects: H Social Sciences > HA Statistics
Divisions: Faculties > Science Technology and Medical Studies > School of Mathematics Statistics and Actuarial Science
Depositing User: Judith Broom
Date Deposited: 19 Dec 2007 18:20
Last Modified: 29 Apr 2014 08:50
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