Reducing the variability between constant-depth film fermenter experiments when modelling oral biofilm


Hope, CK ORCID: 0000-0003-2986-0824, Bakht, K, Burnside, G ORCID: 0000-0001-7398-1346, Martin, GC, Burnett, G, de Jong, E de Josselin and Higham, SM ORCID: 0000-0002-4097-4702 (2012) Reducing the variability between constant-depth film fermenter experiments when modelling oral biofilm. JOURNAL OF APPLIED MICROBIOLOGY, 113 (3). pp. 601-608.

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Abstract

<h4>Aims</h4>The inherent instabilities associated with the development of multispecies biofilm communities within the constant-depth film fermenter (CDFF) and other microcosm systems can yield unacceptable variability between experiments, which could limit their potential applications in oral microbiology. The extent of this variability needs to be determined and a protocol developed which minimizes it.<h4>Methods and results</h4>Two custom-made CDFFs were supplied concurrently with the same inoculation culture, begat from an aliquot of a saliva pool and artificial saliva growth medium via a dual-channel pump. Transformed log(10) data of the viable counts at fixed time points were analysed using the Bland-Altman approach to test for the levels of agreement between two CDFFs running concurrently and those CDFFs run in series. The coefficients(95%) of agreement were lower (i.e. less variable) in the concurrent model than when run in series for total counts of bacteria (1.238 vs 2.124), Lactobacillus spp. (0.517 vs 1.431) and Mutans streptococci (2.817 vs 3.864). Other measures of variability showed a similar trend.<h4>Conclusions</h4>Operating CDFFs concurrently minimizes the degree of difference and variability between them.<h4>Significance and impact of the study</h4>Operating CDFFs concurrently will improve the sensitivity for experiments that seek to determine the effects of a variable, such as a nutritional supplement or antimicrobial agent, and a control.

Item Type: Article
Additional Information: ## TULIP Type: Articles/Papers (Journal) ##
Uncontrolled Keywords: biofilm, constant-depth film fermenter, dental plaque, in vitro modelling
Depositing User: Symplectic Admin
Date Deposited: 16 Aug 2016 15:26
Last Modified: 15 Mar 2024 01:41
DOI: 10.1111/j.1365-2672.2012.05368.x
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002950
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