SLO4, A New Interferon Inducer Isolated from Klebsiella Pneumoniae and Escherichia Coli

Abstract
A product isolated from K. pneumoniae and E. coli, coded SLO4, has been shown to be effective in endogenous interferon induction in vivo in mouse when administered i.p. or i.v. and in vitro with human leukocyte cultures. In these 2 systems induced interferon was defined. The inducer has not yet been characterized but seems not to belong to any components known to be interferon inducers such as viral particles, nucleic acids or endotoxins. An analytical study will be carried out to specify the constitution of this interferon inducer. [SLO-4 has been used in human therapy as a non-specific immunostimulant it enhances resistance to bacterial infection.].