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Biomedical subjects

I Böhlck

Publications and source records attributed to I Böhlck.

17 recordsLinked to original sources
PubMed1980

[On the occurrence of staphylococci and pseudomonas in swimming-pool water (author's transl)].

1. Analyses made at a bath with an additional ozone processing stage showed that the bathers caused a marked bacterial contaminatin on busy days and that this contamination did not originate from the purification plant. 2. This finding and numerous individual analyses of water from various swimming pools yielded a spectrum of 14 micro-organisms, 4 genera being of frequent incidence: bacillus, staphylococcus, pseudomonas and flavobacterium. In general, bacterial contamination exists not only in the pool itself but also after filtering and even subsequent to the addition of chlorine. Staphylococci were found to be particularly invulnerable even to high chlorine contents, which is likely to be attributable to their enclosure in organic material. 5. Tenfold sampling demonstrated that the identification of Staphylococcus aureus in individual samples is unreliable despite its ubiquitous occurrence, probably due to their uneven distribution in the water, while the identification or exclusion of Pseudomonas aeruginosa proves sufficiently dependable even with only individual samples. 4. The general routine analysis of swimming pool water for the presence of staphylococcus aureus appears not justifiable, whilst testing for Pseudomonas aeruginosa appears justifiable, especially for identifying potentially dangerous filter contaminations.

Bacillus↗
PubMed1980

[Results of phage typing of Salmonella typhi and Salmonella paratyphi-B in the years 1974-1978 from the Federal Republic of Germany including Berlin (West) (author's transl)].

In the period between 1.1.1974 and 31.12.1978 phage typing of 2058 strains of S. typhi and 1672 strains of S. paratyphi-B was carried out. 45 S. typhi phage types were found, 11 of these occurred in a frequency of more than 1% (relevant to foci). These were E1 a (21.6%), A (17.7%), F1 (5.8%), D1 (5.5%), C1 (4.6%), E1b (4.1%), D2 (2.5%), 40 (1.5%), 29 (1.3%), B2 (1.0%), 46 (1.0%). Among S. paratyphi-B strains 23 phage types or varieties were observed, 11 of these occurred in a frequency more than 1% (relevant to foci): Taunton (46.9%), 1 m.c. (7.8%), 3aI m.c. (7.7%), B.A.O.R. (6.5%), 3aI var. 1 (5.5%), Dundee (4.4%), 3a m.c. (3.0%), 3b m.c. (2.2%), Beccles m.c. (1.9%), Jersey (1.5%), 1 var. 1 (1.4%). In the year 1974 two epidemics of typhoid fever occurred, one with 417 cases (phage type A, subtype Tananarive) and the other with 41 cases (phage type E1a). In the year 1977 there was an outbreak of paratyphoid B fever with 53 cases (phage type 3aI var. 1). The increasing number of imported cases of typhoid and paratyphoid fever from other countries is remarkable. The age distribution of typhoid and paratyphoid bacilli carriers shows that persons who are older than 60 years represent the age group in which carriers occur most frequently.

Adolescent↗
PubMed1977

[Results of phage typing of Salmonella typhi and Salmonella paratyphi-B in the years 1970-1973 (author's transl)].

Between 1.1.1970 and 31.12.1973 3639 strains were typed with the aid of phage typing. Of these strains 1793 belonged to S. typhi and 1846 to S. parathyphi-B. 40 S. typhi phage types were found. 9 of these occurred in a frequency of more than 1% (relevant to foci). These were E1 (25.7%) (of this E1a 19.7%, E1b 5.9%), A (16.6%), F1 (7.5%), D1 (59%), C1 (5.4%) D2 (2.3%), 46 (2.1%), 28 (1.9%). Among S. paratyphi-B 24 phage types resp. varieties were found, 14 of these occurred in a frequency of more than 1% (relevant to foci). The phage types comprised Taunton (36.8%), 1 m.c. (10.3%), 3aI m.c. (7.5%), B.A.O.R. (6.8%), 3 a m.c. (4.9%), Dundee (4.6%), 3 aI var. 1 (4.6%), Beccles m.c. (2.4%), 3 b m.c. (2.3%), 3 aI var. (2%), 1 var. (1.8%), 3 aI var. 4 (1.1%). As far as it came to be known the epidemiological relations and particularities of the different S. typhi and S. paratyphi-B phage types are discussed. In th period of this report only one larger epidemic outbreak of S. paratyphi-B (type Taunton) occurred. Possibly the cause of this was contaminated milk.

Bacteriophage Typing↗
PubMed1976

[Demonstration of antibodies to salmonella-R-antigens in sera of patients suffering from salmonelloses (author's transl)].

The extent of hemagglutinating antibody titers against Salmonella R-lipopolysaccharides in 189 sera of 119 human beings suffering from various salmonelloses was estimated. When compared to serum specimens of 137 healthy persons a significant rise in the number of Ra- and Rb2-titer containing sera was observed. It was further found that titers directed against chemotypes Ra, Rb2 and Rc were significantly enhanced in height when compared to the control group. Sera of healthy persons and patients did not show significant differences in Rd1-, Rd2- and Re-titers, respecively. The results indicate that the innermost part of the LPS core in Salmonella S-forms is considerably less (or even none) immunogenic in respect to antibody formation. R-titers in sera from patients suffering from salmonelloses as well as from healthy persons were predominantly directed against Ra-, Rb2- or Rc-LPS structures; the Ra-titer being the most frequent one in both groups. More detailed analyses on sera from patients suffering from salmonelloses revealed a somewhat lower content of R-titers in the early stage of infection. Furthermore in typhoid fever changes in the height of Ra-titers paralled the usual course of O-titers and in gastroenteritic infections the course of illness, respectively. The immunogenicity of the LPS core, however, was less expressed than that of the O-polysaccharides as revealed from a comparison in extent and height of R- and O-titers. Frequently the salmonelloses sera showed titers against several R-antigens. In such cases Ra-titers mostly occurred either together with Rb2-titers alone or concomitantly with both Rb2- and Rc-titers. In absorption experiments it could be demonstrated that two types of antibodies had been formed, those directed against terminal sugar residues in R-lipopolysaccharides and others with specificties against internal partial structures of the core.

Antibodies, Bacterial↗