The relevance of different urinary sampling methods in male patients with indwelling catheters was studied. There was good agreement between the bacterial strains cultured from urine sampled at the catheter end compared to samples obtained by catheter puncture. However, one-quarter of the samples obtained by the catheter did not show complete agreement with the bladder aspiration samples. It is concluded that, in patients with an indwelling catheter, urinary sampling by the catheter does not always provide relevant information about the bacterial strains present and bladder aspiration is advised.
Frequencies of HL-A antigens, blood groups (ABO, Rh, MNSs, Kell, Lewis and Duffy), serm groups (Hp, Gc and C3) and red cell enzyme types (PGM1· 6-PGD and AK) were studied in a series of 122 psoriatic patients from northern Sweden. The increased frequency of the HL-A antigens W17 and HL-A13 found in previous investigations was confirmed. An association was found with the MNSs blood groups, Ss heterozygotes being strongly underrepresented among psoriatic patients. The frequencies of the blood type Le (a–b–) in the Lewis system and the A-factor in the ABO-system were found to be increased in proriasis. In the psoriatic patients a significant deficiency of heterozygotes was found in the Hp and C3 serum groups.
Serum samples from 1,196 blood donors living in five different areas in Sweden were examined, with respect to C3 serum types, by means of high-voltage agarose gel electrophoresis. Two common variants (F and S) and four rare variants were found. No significant frequency differences were found between the Swedish subpopulations, nor were there any significant frequency differences between the population of Sweden and those of other European countries. The estimated gene frequencies in the total Swedish material were: C3F = 0.1944, C3S = 0.7972 and rare genes = 0.0084.
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