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M Polz

Publications and source records attributed to M Polz.

7 recordsLinked to original sources
PubMed2000

Triploblastic relationships with emphasis on the acoelomates and the position of Gnathostomulida, Cycliophora, Plathelminthes, and Chaetognatha: a combined approach of 18S rDNA sequences and morphology.

Triploblastic relationships were examined in the light of molecular and morphological evidence. Representatives for all triploblastic "phyla" (except Loricifera) were represented by both sources of phylogenetic data. The 18S ribosomal (rDNA) sequence data for 145 terminal taxa and 276 morphological characters coded for 36 supraspecific taxa were combined in a total evidence regime to determine the most consistent picture of triploblastic relationships for these data. Only triploblastic taxa are used to avoid rooting with distant outgroups, which seems to happen because of the extreme distance that separates diploblastic from triploblastic taxa according to the 18S rDNA data. Multiple phylogenetic analyses performed with variable analysis parameters yield largely inconsistent results for certain groups such as Chaetognatha, Acoela, and Nemertodermatida. A normalized incongruence length metric is used to assay the relative merit of the multiple analyses. The combined analysis having the least character incongruence yields the following scheme of relationships of four main clades: (1) Deuterostomia [((Echinodermata + Enteropneusta) (Cephalochordata (Urochordata + Vertebrata)))]; (2) Ecdysozoa [(((Priapulida + Kinorhyncha) (Nematoda + Nematomorpha)) ((Onychophora + Tardigrada) Arthropoda))]; (3) Trochozoa [((Phoronida + Brachiopoda) (Entoprocta (Nemertea (Sipuncula (Mollusca (Pogonophora (Echiura + Annelida)))))))]; and (4) Platyzoa [((Gnathostomulida (Cycliophora + Syndermata)) (Gastrotricha + Plathelminthes))]. Chaetognatha, Nemertodermatida, and Bryozoa cannot be assigned to any one of these four groups. For the first time, a data analysis recognizes a clade of acoelomates, the Platyzoa (sensu Cavalier-Smith, Biol. Rev. 73:203-266, 1998). Other relationships that corroborate some morphological analyses are the existence of a clade that groups Gnathostomulida + Syndermata (= Gnathifera), which is expanded to include the enigmatic phylum Cycliophora, as sister group to Syndermata.

Animals↗
PubMed1995

[The response to the hepatitis B virus vaccine in patients undergoing hemodialysis and peritoneal dialysis--personal experience].

In 55 hemodialyzed and 15 patients on CAPD the presence of hepatitis B and C markers was estimated before the beginning of the vaccination series against hepatitis B with Engerix B vaccine. The initial anti-H Bs antibody titres was also estimated in these patients. The patients without H Bs Ag who have the anti-Hbs titres below 10 IU/I were qualified for this vaccination. The vaccination was needed by 40% of hemodialyzed patients H Bs(-) and 93% patients on CAPD. After completing the half year lasting series of vaccinations, the serological answer in vaccinated patients was estimated. The protective antibody titres above 10 IU/I was produced by 62.5% of patients on hemodialysis and 64.4% of patients on CAPD. The presence of anti-HCV antibodies had insignificant influence on the ability of producing the protective antibody titres in vaccinated patients.

Adult↗
PubMed1989

Viral hepatitis among the hospital staff.

The paper compares the incidence of viral hepatitis, the frequency of occurrence of antigen HBs, as well as the clinical course of the disease in medical staff in relation to patients in the general population. The analysis has shown that the incidence rate in the Lublin district in the years 1979-1984 was 453.7 per 100,000 medical employees, and was 3.4 times higher than in the general population. No differences, however, were stated in the severity of the clinical course of the illness and in the activity of selected index enzymes indicating impaired liver functions among the medical staff and the other patients.

Adult↗
PubMed1986

Nosocomial infection in a children's hospital. A retrospective study.

The investigations the frequency of the occurrences of hospital infections were carried in a General Pediatric Ward. Most of the infections (77 per cent) appeared in children up to one year of age. The hospital infections mostly affected children residing in rural areas. The etiological agent was E. coli (36 per cent), Proteus (22.7 per cent) Klebsiella and Staphylococcus. The infections caused by E. coli mainly appeared in girls, others- in boys. The frequency of the occurrences of hospital infections was also analysed with respect to the primary disease of a child. In most cases of additional infections were found in children with upper respiratory tract infections, pneumonia and bronchitis. The above differences are statistically valid.

Child↗