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Biomedical subjects

R A Barrett

Publications and source records attributed to R A Barrett.

At least 19 recordsLinked to original sources
PubMed1988

Apparent agency: how can hospitals combat the appearance?

This article examines one of the newer theories of liability which courts are using to hold hospitals liable for the negligence of their physicians. The authors suggest possible ways in which a hospital, including its medical record department, can attempt to avoid, or at least minimize, this liability risk.

Contract Services↗
PubMed1978

Prevalence of hepatitis B surface antigen in a dental school patient population.

A sample of 300 adult patients accepted for initial treatment between January 5th and 24th, 1977 at the Louisiana State University School of Dentistry had blood samples drawn and analyzed by radioimmunoassay+ for the presence of hepatitis B surface antigen (HBSAg). Two patients were positive for HBSAg (a prevalence of .67 percent. Medical questionnaire information obtained from each participant indicated that 11 patients had had hepatitis; seven were confirmed by the patients' private physicians. Both patients positive for HBSAg gave confirmed histories of having had hepatitis. The information gathered tends to indicate that dental patients who give a history of hepatitis should have a blood sample drawn and analyzed by radioimmunoassay for HBSAg to determine whether they are carriers of HBSAg. This analysis should precede any dental treatment. Further studies are planned to obtain information from another sample population.

Adolescent↗
PubMed1977

Resistance of cysts of amoebae to microbial decomposition.

Cyst walls of Acanthamoeba rhysodes, A. palestinensis, A. castellanii, and one other strain of Acanthamoeba contain 36 to 45% protein and 20 to 34% carbohydrate. More than half of the protein in the walls of A. palestinensis, A. castellanii and Acanthamoeba sp. is accessible to and hydrolyzed by protease, and 67 to 69% of the carbohydrate of A. palestinensis and A. rhysodes walls is hydrolyzed by cellulase. The extent of hydrolysis of walls of the other amoebae by these enzymes is appreciably less, and chitinase and beta-1,3-glucanase have no detectable effect. Protease solubilizes 10% or less of the weight of intact cysts, and no solubilization is observed with cellulase. Walls of A. palestinensis are extensively degraded in soil, the activity is less with A. rhysodes, and little attack on the other amoebae occurs. When added to soil, the protozoa excyst and grow for short periods, the trophozoites then die, and chiefly cysts persist thereafter.

Journal Article↗