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BACKGROUND Macrophage activation by cytokines provides only a partial explanation of antimycobacterial immunity in man. Because cytolytic T lymphocytes have been shown to contribute to immunity in animal models of intracellular infection, the generation of mycobacterial antigen specific cytotoxic T cells was examined in the peripheral blood of patients with(More)
Human CD4+, mycobacteria-specific, cytolytic T cell clones were used to lyse BCG-infected macrophages, and the effect on the subsequent growth and viability of the organisms was examined. The survival of released bacteria following cell lysis was assessed by both 3H-uridine labelling and colony-forming unit (CFU) estimation. The results indicate that even(More)
Pneumocystis carinii is an important opportunistic pathogen in patients with compromised cell-mediated immunity. T-cell and macrophage function are believed to be of prime importance in defence against this organism. The present ultrastructural study is aimed at the analysis of the interaction between human macrophages and P. carinii in vitro. Adherent(More)
Mycobacterium bovis-BCG infected macrophages were exposed in vitro to PPD-stimulated T lymphocytes from tuberculin responsive donors or to a panel of mycobacterial-antigen specific CD4+ T cell clones. Both polyclonal and clonal T cells caused considerable antigen-specific lysis of autologous or MHC class II matched macrophages. However, lysis of infected(More)
Ciprofloxacin and other related fluorinated 4-quinolones have microbiological and pharmacokinetic properties that suggest they could be useful agents in the management of typhoid fever and bacterial gastroenteritis. Initial studies confirm that this is the case. Against fully sensitive Salmonella typhi ciprofloxacin is clinically as effective as(More)
Antibiotics have an important place in the management of gastrointestinal disease. Recent studies have demonstrated efficacy in acute bacterial gastroenteritis caused by salmonellae and campylobacteriaceae, shigellae and enterotoxigenic strains of E coli (ETEC). Tetracycline remains effective in cholera. Antibiotic resistance is widespread amongst the(More)
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