Figure 4 in Regional Distribution Of A Brain-Encysting Parasite Provides Insight On Parasite-Induced Host Behavioral Manipulation

Figure 4. Mean (± SE) total brain surface area (A), parasites found per square millimeter of brain surface area (i.e., parasite density) for lowinfection (B) and high-infection (C) treatment groups, and, total parasite numbers found in each brain region for low-infection (D) and high-infection (E) treatment groups, respectively. The brain regions of interest, the telencephalon (black bars), diencephalon/mesencephalon (gray bars), and the rhombencephalon (white bars), are located on the x-axis. In order to make comparisons among individuals, it was necessary to standardize each brain region into sub-regions. That is, both the telencephalon and rhombencephalon were divided into 4 sub-regions of interest. Due to the large surface area covered by the diencephalon/mesencephalon, this area was divided into 10 sub-regions of interest. Note that the figure in (A) illustrates the total brain surface area in each sub-region, which, when compared to the brain surface parasite densities in both treatment groups, shows that the parasite aggregation numbers are not dependent upon available surface area.