Betty G M Gortemaker

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Whilst broilers are recognised as a reservoir of extended-spectrum-β-lactamase (ESBL)- and AmpC-β-lactamase (AmpC)-producing Escherichia coli, there is currently limited knowledge on the effect of slaughtering on its concentrations on poultry meat. The aim of this study was to establish the concentration of ESBL/AmpC producing E. coli on broiler chicken(More)
The causes of differences in Campylobacter and Escherichia coli concentrations on broiler chicken carcasses after chilling between slaughterhouses are not fully identified. Therefore, it is a challenge for slaughterhouses to comply with Process Hygiene Criteria for broiler meat. The aim of the study was to identify which processing steps contribute to(More)
A procedure is described for the detection of five sulfonamides in muscle and kidney of swine, chicken and cattle. The method consists of an extraction with dichloromethane, cleaning up of the extracts on a Sep-Pak silica disposable column, and analysis by thin-layer chromatography on a silica plate with chloroform/n-butanol as an eluent. The sulfonamides(More)
An automated method is described for the enzymatic determination of adenosine-5'-triphosphate (ATP) in meat using hexokinase (EC and glucose-6-phosphate dehydrogenase (EC in the range of 0-115 micrograms/ml. THe NADPH formed is measured spectrophotometrically at 340 nm. ATP can be analysed at a rate of forty samples per hour.
A rapid procedure for the determination of sulfamethazine in swine muscle and kidney is described. The method comprises sonication-aided extraction with dichloromethane, cleaning-up of the extract on a combination of silica and reversed-phase C18 Sep-Pak cartridges and analysis by high-performance liquid chromatography on a Hypersil ODS column using(More)
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