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Biomedical subjects

M Ranke

Publications and source records attributed to M Ranke.

27 records · Page 2Linked to original sources
PubMed1978

Application of a solid-phase radioimmunoassay and immune electron microscopy for hepatitis A in diagnosis and research.

With crude virus suspensions from stool and antibodies from hepatitis-A patients, a solid-phase radioimmunoassay (RIA) for detection of hepatitis virus A (HVA) had antibodies against hepatitis virus A (anti-HVA) has been developed. Examples for the application of this test are demonstrated. Virus particles from the stools of the two patients were further characterized. Serologically, they were identical or very similar to the MS-1 strain. Isopycnic CsCl-gradient centrifugation of both strains revealed two peaks, but the particles of different densities did not differ in size or serologically. A modification of the RIA was also useful for determination of IgM antibodies in patients' sera fractionated by sucrose-density centrifugation. The application of the RIA method for serologic epidemiology is demonstrated by a comparison of anti-HVA prevalence in German and non-German women residing in Germany.

Adolescent↗
PubMedDate not supplied

[Iodine concentration in the breast milk of mothers of premature infants].

UNLABELLED: In this prospective study the longitudinal iodine concentration was compared in breast milk of preterm infants mothers, with and without iodine supplementation. 195 samples of breast milk from 60 mothers were analyzed by HPLC longitudinally. RESULTS: Mothers who take additional iodine (200 micrograms/d) had significant higher mean iodine concentrations in breast milk (mean: 7.6 +/- 6.3 micrograms/dl) than mothers without additional iodine supply (mean: 5.5 +/- 5.8 micrograms/dl/p < 0.02). Nontreated mothers showed significantly more breast milk iodine concentrations below the recommended minimum concentration of 5 micrograms/dl (64%, n = 84) than treated mothers (40%, n = 25/p = 0.0016). Mean iodine intake in preterm infants of treated mothers was higher (11.9 micrograms l/kg) than in preterm infants of nontreated mothers (7.9 micrograms l/kg). DISCUSSION: The measured iodine concentrations in breast milk of preterm infants mothers markedly varied inter- and intraindividual. The variations might be explained by irregular daily iodine intake and a dilution effect by increasing breast milk volumes. CONCLUSIONS: Iodine supplementation of lactating mothers leads to elevated iodine content of their breast milk. The recommended intake of iodine for both newborns (15 micrograms l/kg) and preterm infants (30 micrograms l/kg) was not reached in the breast fed preterm infants in both groups of our study.

Adult↗