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Biomedical subjects

M Rogers

Publications and source records attributed to M Rogers.

At least 271 records · Page 15Linked to original sources
PubMed1977

Bacterial flora of patients with prematurely ruptured membranes.

Twenty consecutive patients with premature rupture of the membranes were studied to determine the vaginal, endocervical, and neonatal bacteriologic flora. Patients who had membranes ruptured for more than 12 hours had more anaerobic species isolated from vaginal plus endocervical or endocervical cultures alone than did those patients with membranes ruptured for less than 12 hours. Overall, aerobic organisms were more frequently isolated than anaerobic organisms, but the majority of cultures were of a mixed flora. Streptococci, corynebacteria, and Bacteroides organisms were the most frequently isolated organisms from all sites cultured. Lactobacilli were isolated in only 45% of endocervical and vaginal cultures, and Enterobacteriaceae were infrequently encountered. This study indicates that there is a change toward a preponderance of anaerobic species in the birth canal when membranes are ruptured for more than 12 hours, and that this change is detectable before delivery.

Aerobiosis↗
PubMed1976

Flexible coding in word recognition.

An experiment was designed to examine the contribution of phonetic information in the processing of words in tachistoscopic recognition masking. Following stimulus presentation, subjects were required to indicate which of two alternatives had appeared. On trials containing word stimuli, the alternatives were either phonetically identical (SENT, CENT) or not (SOLD, COLD). Recognition performance was inferior in the former case, provided conditions were not structured to discourage reliance on phonetic information. The findings were interpreted as showing that more than one type of coding process can underly the word superiority effect. Phonetic information is ordinarily used to code words in this type of task, but an alternative processing tactic (e.g., one relying on visual or perhaps semantic codes) can also be effectively used in word recognition when phonetic information does not discriminate well among response alternatives.

Discrimination, Psychological↗
PubMed1976

Attempted transfer of antibiotic resistance between Bacteroides and Escherichia coli.

Transfer of antibiotic resistance between Bacteroides organisms and E. coli in mixed culture under optimal anaerobic conditions was attempted. Donor strains used were E. coli with R factors of a number of compatibility groups and Bacteroides with unusually high antibiotic resistance. Recipient strains included E. coli strains with characteristics favouring conjugal transfer. Although control experiments verified that conjugal transfer of derepressed R factors could occur at a high frequency between E. coli in an anaerobic environment, transfer of antibiotic resistance between E. coli and Bacteroides was never demonstrated.

Aerobiosis↗
PubMed1975

[Nursing concepts].

Explore the source record for details and available documents.

Philosophy, Nursing↗
PubMed1975

Comparison of tetracycline and minocyclie transport in Escherichia Coli.

Differences between minocycline and tetracycline transport were demonstrated in an Escherichia coli strain with and without an R factor (R46) which confers moderate Tc resistance. Minocycline uptake was similar in R(+) and R(-) organisms, whereas tetracycline uptake was decreased in the R(+) as compared to the R(-) organism. Sodium azide had little effect on tetracycline uptake by either strain but minocycline uptake was completely inhibited by azide. p-Chloromercuribenzoate greatly decreased tetracycline uptake in both strains while minocycline uptake was markedly augmented. Both minocycline and tetracycline were effective inducers of decreased tetracycline transport, but only tetracycline had an effect on minocycline uptake. Mutual inhibition of uptake of one antibiotic by the other could not be demonstrated. These studies indicate different mechanisms of transport of minocycline and tetracycline in E. coli.

Drug Resistance, Microbial↗