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Biomedical subjects

K N Brown

Publications and source records attributed to K N Brown.

At least 73 records · Page 4Linked to original sources
PubMed1977

Nippostrongylus brasiliensis infection in rats. The cellular requirement for worm expulsion.

The expulsion of antibody-damaged Nippostrongylus brasiliensis nematodes from the intestine of rats irradiated with 750 rad 60Co was induced by thoracic duct lymph (TDL) or mesenteric lymph node (MLN) cells apparently without the help of bone marrow-derived cells. The effector cells were present in the TDL or MLN of rats by the 8th day after infection and could be recovered from the peritoneal cavity. The ability of TDL cells to transfer immunity to irradiated recipients was undiminished when the cells with immunoglobulin on their surface were removed. These results suggest that, following antibody damage, this nematode is expelled by nonimmunoglobulin-bearing lymphocytes which are effective in the absence of newly formed cells derived from the cell recipients.

Animals↗
PubMed1977

Invasion of erythrocytes and antigenic variation.

Consideration of information published on the immunology of malarial parasites has highlighted an unusual problem associated with the penetration of erythrocytes by merozoites, namely, how to reconcile strain and intrastrain antigenic variation in the parasite surface with recognition of specific receptors on red cells. This problem should now be susceptible to experimental investigation.

Animals↗
PubMed1976

In vitro comparison of gentamicin, tobramycin, sisomicin, and netilmicin.

The antimicrobial activity of gentamicin, tobramycin, sisomicin, and netilmicin (Sch 20569) was compared against 150 strains of organisms. Netilmicin was shown to be the least effective against Pseudomonas strains but to have slightly better activity against Staphylococcus aureus and Escherichia coli than the other agents. The effect of calcium and magnesium in enhancing the differences in activity of these aminoglycosides against Pseudomonas strains was also demonstrated.

Aminoglycosides↗
PubMed1976

T cells and protective immunity to Plasmodium berghei in rats.

Experiments were carried out in which unfractionated spleen cells, and T lymphocyte subpopulations characterized by certain experimental criteria, were isolated at various times from rats infected with Plasmodium berghei. By adoptive transfer it was shown that unfractionated spleen cells, and T cells alone, could transfer protection to syngenic recipients as early as 11 days after infection of the cell donors. The protection conferred by T cells increased with the duration of the infection in the donors, at least up to 100 days. The additional presence of B cells in transferred lymphocyte populations enhanced their protective capacity over that shown by T cells alone. The role of T cells in protective immunity to malaria is discussed.

Animals↗