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Sponges are frequently used in kitchens and have been shown to harbor large numbers of bacteria, occasionally also pathogens. Less is known about kitchen brushes regarding usage and presence of bacteria. In the present study, the use of sponges and brushes was studied in a survey among 9966 European consumers in ten countries, and growth and survival of bacteria in sponges and brushes were examined in laboratory experiments. Sponges were the preferred hand-cleaning utensils for washing-up in the majority of countries, while brushes were most frequently used in Denmark and Norway. Consumers mostly change their sponges at regular times, but also sensory cues (looks dirty, smelly, slimy) and usage occurrences such as wiping up meat juices may trigger replacement. Besides cleaning the dishes, over a quarter of the dish brush users also use it to clean a chopping board after soilage from chicken meat juices. The water uptake and drying rate varied considerably, both between different sponges and between brushes and sponges, where brushes dried fastest. Campylobacter survived one day in all sponges and Salmonella more than seven days in two of three types of sponges. In the type of sponge that dried slowest, Salmonella grew on the first day and was always found in higher levels than in the other sponges. Non-pathogenic bacteria grew in the sponges and reached levels around 9 log CFU/sponge. In brushes all types of bacteria died over time. Campylobacter and Salmonella were reduced by more than 2.5 log to below the detection limit after one and three days, respectively. Bacteriota studies revealed a tendency for a dominance by Gram-negative bacteria and a shift to high relative prevalence of Pseudomonas over time in sponges. Both enumeration by agar plating and bacteriota analysis confirmed that the pathogens were in a minority compared to the other bacteria. Treatments of sponges and brushes with chlorine, boiling or in the dishwasher were effective to reduce Salmonella. We conclude that brushes are more hygienic than sponges and that their use should be encouraged. Contaminated sponges or brushes should be replaced or cleaned when they may have been in contact with pathogenic microorganisms, e.g. used on raw food spills. Cleaning of sponges and brushes with chlorine, boiling or dishwasher may be a safe alternative to replacing them with new ones.
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http://dx.doi.org/10.1016/j.ijfoodmicro.2020.108928 | DOI Listing |
Commun Biol
December 2024
Institute of Colloid and Biointerface Science, Department of Bionanosciences, BOKU University, Muthgasse 11/II, 1190, Vienna, Austria.
Mucin, proteoglycan, glyconectin, and hyaluronan intermolecular binding in the physiological hydrated state forms the native glycocalyx ultrastructure via the polyvalent interactions of their similar bottle-brush morphologies. This ultrastructure provides a variety of essential cellular recognition/adhesion and selective filtration functions. Unfortunately, for decades, the glycocalyx architecture was only examined in the non-native dehydrated/fixed state.
View Article and Find Full Text PDFZootaxa
April 2024
IEO-CSIC. Centro Oceanográfico de Gijón (COG-IEO); Avda Principe de Asturias 72bis; 33212 Gijón; Spain; Departamento de Zoología y Antropología Física. Universidad de Alcalá; Madrid; Spain.
The genus Biemna currently includes fifty-eight valid species distributed worldwide with a wide depth range. In this paper, we describe a new species of this genus, Biemna begonae sp. nov.
View Article and Find Full Text PDFPurpose: Silicone mouth swabs have emerged as a promising alternative to gauze, sponge brushes, and soft-bristled toothbrushes, offering a balance between gentle cleaning and effectiveness. The flexibility and softness of silicone make it a suitable material for safely cleaning the sensitive oral tissues of elderly patients. This study aims to determine the optimal hardness level of silicone that maximises cleaning effectiveness while minimising the risk of trauma to oral tissues.
View Article and Find Full Text PDFInt J Biol Macromol
November 2024
Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China; Key laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, 210094, China. Electronic address:
Hemoadhican (HD) is an exopolysaccharide with a branched structure that has been reported for its high hemostatic ability. In this study, a HD-based hemostatic sponge was prepared through ultrasonic dissolution and freeze-drying without using any cross-linking agent. The sponge could spontaneously cross-link using hydrogen bonds to form adhesive mud within 3 s upon contact with blood.
View Article and Find Full Text PDFCureus
May 2024
School of Oral Health Sciences, Faculty of Dentistry, Kyushu Dental University, Kitakyushu, JPN.
Introduction: Brushing older adults or intubated patients who are unable to rinse can transmit bacteria from dental plaque into the oral cavity and increase the risk of aspiration pneumonia. Therefore, this study examined brushing methods to prevent the spread of bacteria in the oral cavity. Methods:Three types of brushing methods were performed on five volunteers by dental hygienists (water group: brushing with toothbrush bristles soaked in water; gel group: brushing with a moisturizing gel placed on the toothbrush; PV-I group: brushing with toothbrush bristles dipped in povidone-iodine).
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