A comparative study using Plasmodium berghei ANKA infected C57BL/6 and BALB/c mice indicated th at both strains of mice expressed CXCL10 (interferon-induced protein 10, IP-10) and CCL2 (monocyte chemotactic protein-1, MCP-1) chemokine genes as early as 24 hours post-infection [12]. This evidence concerns the gene CCL2 and infection.