ArticleApplied and environmental microbiology2006
Estimation of Staphylococcus aureus growth parameters from turbidity data: characterization of strain variation and comparison of methods.
Article in Applied and environmental microbiology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed.
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- ComGA-RelA interaction and persistence in the Bacillus subtilis K-state.Molecular microbiology · 2015Article
- Hydrodynamic chronoamperometry for probing kinetics of anaerobic microbial metabolism--case study of Faecalibacterium prausnitzii.Scientific reports · 2015Article
- An extracorporeal blood-cleansing device for sepsis therapy.Nature medicine · 2014Article
- Effect of Curcumin Against Proteus mirabilis During Crystallization of Struvite from Artificial Urine.Evidence-based complementary and alternative medicine : eCAM · 2012Article
- Human common salivary protein 1 (CSP-1) promotes binding of Streptococcus mutans to experimental salivary pellicle and glucans formed on hydroxyapatite surface.Journal of proteome research · 2010Article
- Comparison of two optical-density-based methods and a plate count method for estimation of growth parameters of Bacillus cereus.Applied and environmental microbiology · 2010Article
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Abstract
Turbidity methods offer possibilities for generating data required for addressing microorganism variability in risk modeling given that the results of these methods correspond to those of viable count methods. The objectives of this study were to identify the best approach for determining growth parameters based on turbidity data and use of a Bioscreen instrument and to characterize variability in growth parameters of 34 Staphylococcus aureus strains of different biotypes isolated from broiler carcasses. Growth parameters were estimated by fitting primary growth models to turbidity growth curves or to detection times of serially diluted cultures either directly or by using an analysis of variance (ANOVA) approach. The maximum specific growth rates in chicken broth at 17 degrees C estimated by time to detection methods were in good agreement with viable count estimates, whereas growth models (exponential and Richards) underestimated growth rates. Time to detection methods were selected for strain characterization. The variation of growth parameters among strains was best described by either the logistic or lognormal distribution, but definitive conclusions require a larger data set. The distribution of the physiological state parameter ranged from 0.01 to 0.92 and was not significantly different from a normal distribution. Strain variability was important, and the coefficient of variation of growth parameters was up to six times larger among strains than within strains. It is suggested to apply a time to detection (ANOVA) approach using turbidity measurements for convenient and accurate estimation of growth parameters. The results emphasize the need to consider implications of strain variability for predictive modeling and risk assessment.
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