[The incidence of E. coli O157H7 strains in causing hemorrhagic enterocolitis].

The authors describe the evidencing of the O157H7 E. coli serotype--an enterohaemorrhagic strain of E. coli--for the first time in our country.

Evaluation of the anti-rubella immunity levels on a lot of 5,000 sera from women at procreative age, tested by HAI, in Romania.

From the study performed on a lot of 5030 sera, prelevated from women between 15-40 years old, tested by hemagglutination inhibition reaction (HAI), divided in 5 age groups of 5 years each, resulted that the percentage of women that can be considered immunologically protected against rubella (with HAI antibody titers greater than or equal to 1/20) varied between 79.5% (15-20 years of age group), and 75.3% (31-35 years of age group).

Some characteristics of the ICCe-1, a new simian embryo cell line.

A new simian embryo cell line has been established from a Cercopithecus male whole embryo. The resultant predominant fibroblast-like cell population has been frozen in convenient quantities and characterized for use in biological research as well as in theoretical and practical virological purposes. The cell line was designated ICCe-1 (Institute Cantacuzino Cercopithecus embryo-1).

An appraisal of a cell culture test for revealing the presence of E. coli thermolabile enterotoxin (L.T.).

Three methods were comparatively used for revealing the presence of thermolabile enterotoxin (L.T.) of E.

[Production and characterization of some mouse embryo cellular substrates in vitro].

Cell cultures with a different multiplication potential in vitro, depending upon the strain source used, were obtained from mouse embryos belonging to the CVA, C57 Black A2G and Swiss strains. Only the Swiss 12 culture underwent spontaneous transformation and was carried through more than 50 passages in vitro. The Swiss-12 substrate proved not to be contaminated either by viruses or micoplasma.