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Biomedical subjects

H F Gorbea

Publications and source records attributed to H F Gorbea.

12 recordsLinked to original sources
PubMed1985

In vitro susceptibility of Neisseria gonorrhoeae to 2-acetylpyridine thiosemicarbazones.

MICs of 20 2-acetylpyridine thiosemicarbazones and penicillin were determined for 25 clinical isolates of beta-lactamase-positive and beta-lactamase-negative Neisseria gonorrhoeae strains. The compounds most active against the beta-lactamase-producing strains were the N4,N4-disubstituted derivatives and the thiosemicarbazone derivatives of the 2-acetylpyridines, followed by the other compounds related to the 2-acetylpyridine thiosemicarbazones.

Anti-Bacterial Agents↗
PubMed1984

Intravenous tubing with burettes can be safely changed at 48-hour intervals.

No studies of safety in changing intravenous systems containing in-line burettes at 48 hours in an intensive care setting have been performed. Patients entering a surgical intensive care unit were alternatively assigned to have any line with an in-line burette changed at either 24-hour (64 patients) or 48-hour (59 patients) intervals. Daily quantitative cultures with a 2-mL aliquot of burette fluid were obtained. Contaminated burette fluid was detected in nine of 452 (2.0%; 95% confidence interval, 0.7% to 3.3%) samples from 24-hour interval burettes and in nine of 224 (4.0%; 95% confidence interval, 1.4% to 6.6%) samples from 48-hour interval burettes. Bacterial contamination of burette fluid with ten or more colonies per milliliter occurred in only five (1.1%) cultures from patients in the 24-hour interval group compared with only two cultures (0.9%) in the 48-hour group. None of the contaminated burette fluids was associated with primary bacteremia. Change of in-line burettes in intensive care at 48-hour intervals is safe and should result in substantial cost savings.

Bacteria↗
PubMed1982

Predictive value of surveillance skin cultures in total-parenteral-nutrition-related infection.

To assess the importance of skin flora in the pathogenesis of infection complicating total parenteral nutrition and the predictive value of positive skin cultures for the development of infection 54 patients, who received 59 courses of total parenteral nutrition, were followed up. Three times per week, at the time of dressing and line changes, the skin at the site of insertion of the cannula was swabbed for culture. Results of skin cultures were compared with results of semiquantitative culture of the proximal intravascular portion of the cannula. Infected patients were defined as those having cannula cultures with greater than or equal to 15 colonies or those with primary septicaemia. 21 of 59 courses (36%) were associated with positive skin cultures; 14 of these 21 courses were associated with cannula infection, 2 with bacteraemia or fungaemia, and 12 with local infection. 38 of 59 (64%) courses had sterile skin cultures; in none of these 38 patients did infection develop (p less than 0.001). Skin colonisation was associated with otherwise unexplained fever (11 of 21 with positive skin culture versus 5 of 38 with negative skin culture, p less than 0.001), inflammation at the insertion site (13 of 21 versus 10 of 38, p less than 0.05), and violations of line protocol (11 of 21 versus 10 of 38, p less than 0.05). The absence of any organism on the skin had a negative predictive value of 98%, whereas the presence of an organism on the skin had a positive predictive value of 61%. Skin culture thus seems able to identify which patients receiving parenteral nutrition are at high risk of infection.

Adult↗