A series of 37 clinical isolates of coagulase-negative staphylococci previously identified as negative for slime production by the tube test were reexamined by the tissue culture plate test under aerobic and anaerobic conditions. None of the strains produced slime under anaerobic conditions; however, five strains (13%) produced slime under aerobic conditions.
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http://dx.doi.org/10.1128/jcm.28.11.2578-2579.1990 | DOI Listing |
Syst Appl Microbiol
January 2025
Department of Laboratory Medicine, Medical Microbiology, Lund University, Medicon Village, SE-223 81 Lund, Sweden.; ConCellae AB, Bårslövsvägen 3, 25373 Helsingborg, Sweden.
Six novel Bifidobacterium strains H1HS16N, Bin2N, Hma3N, H6bp22N, H1HS10N, and H6bp9N, were isolated from the honey stomach of Apis mellifera. Cells are Gram-positive, non-motile, non-sporulating, facultatively anaerobic, and fructose 6-phosphate phosphoketolase-positive. Optimal growth conditions occur at 37 °C in anaerobiosis in MRS medium added with 2 % fructose and 0.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Academy of Sciences, Guangzhou 510650, China.
Arsenic pollution and its associated health risks have raised widespread concern. Under anaerobic conditions, arsenic mobility and toxicity increase when arsenate [As(V)] is reduced to arsenite [As(III)] by microbes through the cytoplasmic and dissimilatory pathways. However, the relative importance of these two pathways in the environment remains unclear, restricting our ability to effectively predict and regulate the environmental behavior of arsenic.
View Article and Find Full Text PDFFront Microbiol
December 2024
Winogradsky Institute of Microbiology, Federal Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia.
Soda lakes are unique double-extreme habitats characterized by high salinity and soluble carbonate alkalinity, yet harboring rich prokaryotic life. Despite intensive microbiology studies, little is known about the identity of the soda lake hydrolytic bacteria responsible for the primary degradation of the biomass organic matter, in particular cellulose. In this study, aerobic and anaerobic enrichment cultures with three forms of native insoluble cellulose inoculated with sediments from five soda lakes in south-western Siberia resulted in the isolation of four cellulotrophic haloalkaliphilic bacteria and their four saccharolytic satellites.
View Article and Find Full Text PDFEnviron Sci Technol
January 2025
National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
Methylmercury in paddy soils poses threats to food security and thus human health. Redox-active phenolic and quinone moieties of natural organic matter (NOM) mediate electron transfer between microbes and mercury during mercury reduction. However, their role in mercury methylation remains elusive.
View Article and Find Full Text PDFJ Anim Physiol Anim Nutr (Berl)
January 2025
Centre for Animal Nutrition and Welfare, University of Veterinary Medicine, Vienna, Austria.
Increasing droughts adversely affect grasslands, diminishing the availability and quality of forages for ruminants. We have recently shown that mixed ensiling of drought-impaired grass (DIG) with sugar beet pulp (SBP) improved the conservation and feed value of silage. The application of silage additives may further improve the ruminal degradability, which may thereby shape the fermentation and microbiome in the rumen when those silages are tested as part of dairy diets.
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