HDGFL2 and infection: Following the introduction of the HRP2-negative parasite, high density infections were found to have a relatively high risk of being caused by HRP2-negative parasites; in the 250 days following introduction, high density infections (>1,000/μL) were on average 4.1 to 5.3 times more likely to contain the HRP2-negative phenotype than low density (10 - ≤1,000/μL) infections.