Morris, DL and Ridout, M.S. (2005) Models for microbiological colony counts. Journal of Agricultural Biological and Environmental Statistics , 10 (2). pp. 158-169. ISSN 1085-7117.
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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.
|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:||13 Dec 2011 13:16|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/569 (The current URI for this page, for reference purposes)|
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