Biomedical subjects
Publications and source records attributed to G L Baker.
Bacteremia and meningitis due to Streptococcus pneumoniae developed in a 52-year-old man 28 hours after an otherwise uncomplicated fiberoptic bronchoscopy. The patient responded to antimicrobial therapy and supportive care and later underwent pneumonectomy for carcinoma. This report reinforces previous observations that bacteremia may occasionally be associated with the performance of fiberoptic bronchoscopy.
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A prospective study of infants born to women with diabetes mellitus is reported. The children were examined at birth and followed at 1, 3, and 5 years of age. Medical and psychological information was obtained through follow-up examinations. Intrauterine growth was atypical and there was an increase in neonatal problems and congenital malformations. There was an increased incidence of intellectual delay at 3 and 5 years of age. The presence of acetone in the urine during pregnancy had a significant, adverse effect on intellectual status of the offspring at 5 years of age. Birth weight was negatively related to intellectual status at both 3 and 5 years of age.
During the past two years, Union Carbide Corporation (UCC) has developed completely automatic systems for monitoring 0-25 ppm vinyl chloride monomer (VCM) in working atmospheres and for processing the data obtained. Each system includes a process gas chromatograph, a sampling system capable of monitoring up to 19 points and data processing equipment. The data systems compute and print out statistical summaries on shift, daily and monthly bases and estimate the maximum exposure to VCM for each job. These systems are now essential operating tools at several UCC production units.
Aspartame is a dipeptide (L-aspartyl-L-phenylalanyl-methyl ester) with a sweeting potential 180 to 200 times that of sucrose. Questions have been raised about potential toxic effects of its constituent amino acids, aspartate and phenylalanine when the compound is ingested in large amounts. Plasma and erythrocyte amino acid levels were measured in 12 normal subjects after administration of either Aspartame (34 mg/kg) or equimolar quantities of aspartate (13 mg/kg) in a crossover design. No changes in either plasma or erythrocyte aspartate levels were noted at any time after either Aspartame or aspartate ingestion. Plasma phenylalanine levels decrease slightly after aspartate loading, and increased from fasting levels (4.9 +/- 1 mumoles/100 ml) to 10.7 +/- 1.9 mumoles/100 ml about 45 to 60 minutes after Aspartame loading. Phenylalanine levels returned to baseline by 4 hours. Erythrocyte phenylalanine levels showed similar changes.
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