Abstract
To evaluate the adjunctive effect of interferon-gamma (IFN-γ) in treatment of Pseudomonas aeruginosa pneumonia, neutropenic and non-neutropenic mice received LD 100 of the organism intratracheally, followed by subcutaneous administration of IFN-γ, ceftazidime (TAZ) or a combination of both agents 2 h post-inoculation. Treatment with IFN-γ alone showed no significant increase in survival when compared with control. Addition of IFN-γ to TAZ resulted in no significant change in survival compared with TAZ alone. Survival in TAZ and TAZ + IFN-γ groups, was significantly higher than in control and IFN-γ groups. This suggests that adjunctive treatment with IFN-γ in combination with ceftazidime may not be more beneficial than the antibiotic alone when managing acute P. aeruginosa pneumonia in both immunocompromised and immunocompetent hosts.
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