Thapliyal, D CSingh, I P1992-04-012009-05-291992-04-012009-05-291992-04-01Thapliyal DC, Singh IP. A delayed permeability factor in the culture filtrates and cell lysates of Salmonella weltevreden. Indian Journal of Pathology & Microbiology. 1992 Apr; 35(2): 129-32http://imsear.searo.who.int/handle/123456789/74121Salmonella weltevreden strains produced a delayed permeability factor (PF) when tested on depilated rabbit skin. The PF activity could be demonstrated in freshly concentrated culture filtrates as well as in the cell lysates. The activity varied with strain and preparation. The induration and blueing reactions were associated with well marked balancing zones.engAnimalsBacterial Toxins --analysisCulture MediaEndothelial Growth Factors --analysisEndotoxins --analysisIndiaLymphokines --analysisRabbitsSalmonella --metabolismSkin --drug effectsSpecies SpecificityTime FactorsVascular Endothelial Growth Factor AVascular Endothelial Growth FactorsComparative Study