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Biomedical subjects

E J Shaw

Publications and source records attributed to E J Shaw.

53 records · Page 3Linked to original sources

Further studies of Escherichia coli in babies after normal delivery.

Previous work showed that on the basis of O serotyping alone of Escherichia coli, the majority of babies acquired the same O serotype as was found in the stools of their respective mothers. Further characterization of the E. coli by H serotyping, determination of their antibiotic resistance and ability to ferment six carbohydrates showed that in the majority of cases the previous results were confirmed. In a minority of cases this further testing showed that the strains were not identical. In some instances a number of strains isolated from the same pair showed different combinations of the markers used.

Antigens, Bacterial↗

Spread of Escherichia coli colonizing newborn babies and their mothers.

Most babies are colonized by the predominant strains of Escherichia coli present in their own mother's faecal flora. Those babies who did not acquire their maternal faecal flora acquired strains of E. coli belonging to a small number of the possible serotypes. Moreover, the same serotypes were found in several babies and other mothers, suggesting spread within the ward. These few strains included some of the O groups which had previously commonly been found as urinary pathogens. These strains may have increased potentialities for colonization of human bowel. Antigenic and biochemical variation was observed among the strains.

Anti-Bacterial Agents↗

Effect of stay in hospital and oral chemotherapy on the antibiotic sensitivity of bowel coliforms.

The effects of oral chemotherapy and stay in hospital on the antibiotic resistance patterns of faecal coliform flora were studied. The coliform flora of 64% of 25 patients who were not receiving antibiotics was sensitive to all drugs tested. Hospitalization alone did not affect this proportion. The administration of tetracycline or ampicillin to patients, whether at home or in hospital, significantly increased the percentage of resistant bowel coliforms. Tetracycline showed a significantly greater effect than ampicillin. There was no significant increase in the percentage of patients with resistant flora after treatment with amoxycillin.

Amines↗

R factors in hospital infection.

In order to assess the clinical importance of R factors 524 "coliform" infections were studied in a general hospital. Of these, 95 were caused by Pseudomonas aeruginosa. Among the remaining 429, 43% were caused by drug-resistant enterobacteria; resistance was frequently multiple and determined by transmissible R factors. Choice of therapy was thus limited but in every case at least one antibiotic, effective in vitro, was still available.

Anti-Bacterial Agents↗

Properties of an R factor from Pseudomonas aeruginosa.

An R factor from Pseudomonas aeruginosa, which confers resistance to penicillins, kanamycin, and tetracycline, was studied in Escherichia coli K-12. The R factor could coexist with F-like or I-like plasmids and therefore constituted a novel compatibility group. The R factor was transferable from E. coli to bacterial genera outside the Enterobacteriaceae (Pseudomonas and members of the Rhizobiaceae) to which transfer of F-like and I-like plasmids could not be demonstrated.

Ampicillin↗