[Somatic embryogenesis of certain Spongillidae during the reproductive period of their life cycle].

Development of small fragments taken from the body of some Spongillidae (Halichondria panicea, Spongilla lacustris) was studied during various periods of their reproductive cycle. Reconstructive morphogenesis of fresh-water sponges from small pieces of their body tissue took 5-7 days and did not depend on the stage of the reproductive cycle in the maternal organism. Form-restoring potentials in marine reproductive sponges were different.

[Pyocin production by bacillus pyocyaneus and sensitivity of strains of different origin to them].

Using the method proposed by Gillies and Govan and their indicator strains, 342 P. aeruginosa strains isolated from the patients were studied in respect to their pyocinogenicity and typed according to the production of different types of pyocins. Besides, in 206 cultures the pyocin sensitivity of 16 standard P.

[Cellular ultrastructure of developing conglomerates of fresh water sponges].

The fine structure of cells of the conglomerates formed after dissociation of tissues of fresh-water sponges has been studied. In the development of the conglomerates of Ephydatia fluviatilis an important role is played by amoebocytes and choanocytes. In amoebocytes the shape of the nucleus, the mitochondria structure, the Golgi complex and endoplasmic reticulum have been found to change.

[Present-day status of the problem and the prospects for the development of the theory of the role of L-form bacteria and Mycoplasma in human urological diseases].

The authors consider the current state of the problem and personal data on the role of L-forms of bacteria and mycoplasma in human infectious pathology. L-forms of bacteria were isolated from the urine in 10% of the patients suffering from pyelonephritis and mycoplasmae--in over one third of all the patients both with pyelonephritis and with cystites and prostatitis. Some of the isolated strains of mycoplasmae produced a cytopathogenic effect on the cell cultures, whereas the rest caused a latent infection.