Journal
INFECTION AND IMMUNITY
Volume 71, Issue 7, Pages 4171-4174Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/IAI.71.7.4171-4174.2003
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Funding
- NIAID NIH HHS [N01-AI-35174, AI04717] Funding Source: Medline
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To investigate the role that cytokines may have in the development of toxoplasmic encephalitis (TE), the levels of gamma interferon (IFN-gamma), tumor necrosis factor alpha (TNF-alpha), interleukin-12 (IL-12]p40[)9 IL-10, IL-6, IL-4, and IL-2 in serum were examined in CBA/Ca mice infected with a type II strain (ME49 or FORT) of Toxoplasma gondii. These strains caused severe (ME49) or mild (FORT) TE in CBA/Ca mice. From weeks 1 to 8 of infection, the levels of IL-6, IL-10, IL-12, IFN-gamma, and TNF-alpha in serum were significantly higher in the ME49-infected mice than in the FORT-infected mice, suggesting a role for these cytokines in the severity of TE in CBA/Ca mice. Since the ME49 and FORT strains are of the same type, our results suggest a role for the parasite in the development of severe TE through the increased production of proinflammatory cytokines and indicate that not all type II strains cause TE.
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