Study of handwashing procedures in the bathrooms of Boston-area hospitals.
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Biomedical subjects
Publications and source records attributed to F A Rosenberg.
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Eight different bottled drinking waters were tested weekly over an 8-month period to determine the diversity of their Pseudomonas population and their sensitivity to eight antibiotics used in treating Pseudomonas infections. Nine species of Pseudomonas were recovered, with P. stutzeri (24%) and P. diminuta (18.8%) being the most common isolates. Sensitivity patterns of environmental and clinical isolates were shown to differ to some degree. Statistical analyses indicated a significant effect of specific antibiotic on the size of the inhibition zone, a significant difference between species and size of inhibition zone, and a strong species-antibiotic interaction. Distribution of species within the brands of water was also significantly different in 68% of the paired comparisons.
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Marine and nonmarine species of bacteria grew well when a simplified silica gel plate preparation was used.
Endo-beta-1,4-glucanase of the cellulolytic bacterium Cellvibrio vulgaris is an actively secreted, truly extracellular enzyme, as supported by growth and secretion studies using filter paper as the sole carbon source.
From a preliminary evaluation, many of the disadvantages of the conventional arch bars appear to be overcome with this new technique. Of particular importance is that no anesthetic is required during placement of the arch bars except when needed for aligning displaced segments or open reductions. The laboratory work can be delegated to a technician, and operating time rarely exceeds an hour. Further evaluation is being done.
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