As Packard discusses, malaria results from a parasitic protozoan infesting the bloodstream via vector transmission, consuming hemoglobin for food, and constantly reproducing. As a result, symptoms of this invasion include fever, chills, fatigue, diarrhea, nausea, mental confusion, etc. Connecting malaria to coevolution, while Packard discusses the ability of malarial parasites to evolve and adapt, he also invokes that tropical populations have evolved biological defenses to certain types of malaria, referred to as acquired immunity. Understanding this evolutionary factor aids in the potential suppression of malaria considering that acquired immunity is not permanent. To explain, if an immune adult moves to a temperate, uninfected area for a few years and then returns to the tropics, he/she will likely suffer from malaria, having lost immunity. Hence, having immune adults remain stationary in the tropics has the potential to lower illness rates, for migration can cause a resurgence of adult
As Packard discusses, malaria results from a parasitic protozoan infesting the bloodstream via vector transmission, consuming hemoglobin for food, and constantly reproducing. As a result, symptoms of this invasion include fever, chills, fatigue, diarrhea, nausea, mental confusion, etc. Connecting malaria to coevolution, while Packard discusses the ability of malarial parasites to evolve and adapt, he also invokes that tropical populations have evolved biological defenses to certain types of malaria, referred to as acquired immunity. Understanding this evolutionary factor aids in the potential suppression of malaria considering that acquired immunity is not permanent. To explain, if an immune adult moves to a temperate, uninfected area for a few years and then returns to the tropics, he/she will likely suffer from malaria, having lost immunity. Hence, having immune adults remain stationary in the tropics has the potential to lower illness rates, for migration can cause a resurgence of adult