[The identification of nonfermentative gram-negative bacteria. Experiences with 676 apyocyaninogenic strains (author's transl)].

During a period of 16 months 1757 strains of nonfermentative gram-negative rods have been isolated from clinical material. Of the, 1205 (69%) were P. aeruginosa, 124 (10%) of which failed to produce pyocyanin.

[Tetanus antibody screening in blood donors].

Two ELISA test methods for detection of tetanus antibodies are presented which are suitable for routine screening. Administration of the tests to blood donors shows good average immunization of the Swiss population against tetanus. Due to compulsory immunization during military service, men exhibit markedly higher antibody levels against tetanus than women.

Griseorubins, a new family of antibiotics with antimicrobial and antitumor activity. II. Biological properties and antitumor activity of the antibiotic complex griseorubin.

The antibiotic complex griseorubin has antimicrobial activity against Gram-positive as well as -negative bacteria, mycobacteria, mycoplasma and protozoa in vitro but it is not active against yeast and fungi. Tests with transplantable rodent tumors indicate that griseorubin is inhibitory to the growth of lymphatic leukemia L1210 in mice and Zajdela ascites hepatoma in rats. The acute LD50 of griseorubin in mice is 50 mg/kg of body weight when given intraperitoneally.

Griseorubins, a new family of antibiotics with antimicrobial and antitumor activity. I. Taxonomy of the producing strain, fermentation, isolation and chemical characterization.

A new antibiotic complex has been obtained from the cultures of Streptomyces strain No. IMET 20978 isolated from the shrimp Crangon crangon L. On the basis of taxonomic studies the producing microorganism is described as Streptomyces fimicarius (Duché) Waksman et Henrici, 1948, type strain IMET 20978.

[Serological confirmation of the two subspecies of Neisseria mucosa Véron et al. 1959 (author's transl)].

The two subspecies of N. mucosa (subsp. mucosa, subsp.

Establishment of a variant cell clone growing at 41 degrees C from embryonic rat and tupaia (tree shrew) fibroblast cells.

Rat and tupaia 41 degrees C temperature variant cell clones were derived from parental embryonic cells, cloned and established in tissue cultures. Both variant cell clones grew permanently at 41 degrees C. The morphology of these cell clones was altered in comparison to the original fibroblast cell clones.

[The catecholaminergic connections of the visual system of the albino rat (author's transl)].

By using the glyoxylic acid method of DE LA Torre and Surgeon (1976), occurrence, distribution and origin of catecholamines were investigated in the visual system of the albino rat. A dense network of green fluorescent terminals and preterminals could be detected in the dLGN. The spreading of terminals of catecholaminergic fibres had been observed in laminae I and II of the visual cortex.

[Distribution of species of Moraxella and moraxella-like organisms in the nasopharynx of healthy human adults (author's transl].

By means of a lincomycin containing selective medium, gram-negative, oxidase-positive, non-motile, non-saccharolytic, penicillin-sensitive rods have been isolated from 24 of 165 healthy adults (13,9%). Three strains were lost, 7 strains were Moraxella osloensis (4,2%), 12 strains were Neisseria elongata (7,3%) and 2 strains were considered to be a subspecies of N. elongata (1.

[Group Y meningococci as respiratory pathogens (author's transl)].

Serogroup Y meningococci are more frequently respiratory pathogens than one might suppose from their prevalence in meningitis and septicemia. A case of a peracute fatal septicemia caused by group Y meningococci is reported here in which post mortem hemorrhagic lesions of the pharyngeal, laryngeal and tracheal mucosae as well as a beginning pneumonia and pleurisy have been found. The association of meningococcal and respiratory viral infections is discussed.

[Endocarditis lenta caused by Lactobacillus salivarius subsp. salicinicus (author's transl)].

After two tooth extractions performed without antibiotic cover endocarditis lenta occurred in a ten-year-old girl. The causative organism isolated was Lactobacillus salivarius subsp. salicinicus, the first such reported case.

[Pseudomonas aeruginosa in the feces of healthy man (author's transl)].

By means of a selective medium described for the isolation of Listeria monocytogenes (nalidixic acid - trypaflavin - serum agar) 18 strains of Ps. aeruginosa have been obtained from the feces of 344 healthy adults (5.2%).

[Some properties of carrier strains of Listeria monocytogenes (author's transl)].

About 60 characteristics have been investigated in 7 hemolyzing and 12 nonhemolyzing strains of L. monocytogenes. From these investigations resulted inter alia that the organism grows well under strictly anaerobic conditions, esculin is split at 45 degrees C,NH3 is produced from peptone, but not from arginin, and H2S can be traced by sufficiently sensitive methods.

[Biochemical differentiation between N. sicca and N. perflava (author's transl)].

Neisseria sicca forms an iodine-positive metabolic product when grown on Trypticase soy agar without the addition of sucrose. This reaction which does not occur with N. perflava may be useful for differentiating between the two species.

[Columnar organization of pyramidal cells of the visual cortex in the albino rat].

1. The arrangement of the pyramidal cells of the visual cortex has been investigated by light and electron microscopy in 36 albino rats. 2.

[How fastidious are the so-called non-fastidious neisseriae? (AUTHOR'S TRANSL)].

75 strains of all the so-called non-fastidious Neisseria species were examined for their ability to grow on blood and nutrient agar at temperatures between 22 degrees C and 45 degrees C. The result was that only Neisseria mucosa var. mucosa, N.

[The rate of healthy carriers of Listeria monocytogenes].

The feces of 318 healthy adults were examined for L. monocytogenes by means of the cold enrichment and of two different selective media (nalidixic acid-trypaflavin-serum agar; Braveny medium). 15 persons (4.