Folia Microbiologica

Wahab, A. M. A.

doi: 10.1007/bf02876785pmid: 806505

The fungal and bacterial flora of the leaf surfaces of five plants growing in Egypt were studied. The fungal flora showed seasonal fluctuations with at least one peak. Twenty three genera with fifty three species were found,Aspergillus andPenicillium being most common. Other fungi showed variable percentages of the total count. Nitrogen-fixing bacteria were not isolated from the phyllosphere of the five plant species. Micrococci were most predominant among the epiphytic bacteria. Spore-forming bacteria and actinomycetes were less frequent on the leaf surfaces of the associated plants.

Miler, I.; Stelzner, A.

doi: 10.1007/bf02876787pmid: 1095463

The inhibitory effect of carrageenin, a sulfated algal polygalactose, on humoral factors of natural resistance is discussed. In dependence on dose and time, the influence of non-specific and specific bacteriolysis, on thein vitro andin vivo opsonic activity and on the course of infection was studied.

Shmuter, L. M.

doi: 10.1007/bf02876788pmid: 1170127

The kinetics of antibody-forming cells (AFC) in the spleen of rats immunized withSalmonella typhi O-antigen was investigated. The number of nucleated cells of spleen and blood serum antibody titres in passive haemagglutination were determined in parallel. Cyclic changes in the number of antibodyforming cells were detected as three peaks on the 4th, 9th and 13th days following immunization. The fluctuations of their number were not related to the total number of nucleated cells of spleen. The antibody titres reached their peak on the 10th day following immunization, decreased by the 14th day and rose again on the 16th day after immunization. Repeated increases of the number of AFC were probably due to the regular, not accidental, recruitment of committed precursor cells (memory cells).