This paper examines whether global warming could make malaria a renewed public health threat in the United States. Drawing on CDC data, it explains the climatic conditions — particularly temperature, humidity, and rainfall — that enable malaria transmission. The paper traces the historical presence of malaria in the American South and the public health interventions, such as the Tennessee Valley Authority's malaria control program and the Malaria Control in War Areas initiative, that successfully eliminated it. While acknowledging that rising temperatures could increase risk, the paper argues that temperature alone is insufficient to cause resurgence, and that established public health infrastructure makes containment feasible.
Malaria has long been thought of as the bane of travelers to and residents of the tropical and subtropical regions of the globe. According to the Centers for Disease Control and Prevention (CDC), every 30 seconds in Africa a child dies of this disease. It is easy to forget that the construction of the Panama Canal was made possible only after yellow fever and malaria were brought under control in that region. But could global warming make this formerly prevalent illness resurge in the United States? (CDC, "Malaria: History," 2004)
The CDC's discussion of the distribution of malaria states that where the disease is found depends mainly on climatic factors such as temperature, humidity, and rainfall levels. "Malaria is transmitted in tropical and subtropical areas," specifically where mosquitoes are prevalent and the malaria parasites can complete their growth cycles in mosquitoes, which then infect humans. (CDC, "Malaria: Geographical Conditions," 2004)
Those concerned about global warming will be alarmed to learn that temperature is particularly critical to facilitating the spread of malaria. For example, at temperatures "below 20°C (68°F), Plasmodium falciparum (which causes severe malaria) cannot complete its growth cycle in the Anopheles mosquito, and thus cannot be transmitted." (CDC, "Malaria: Geographical Conditions," 2004) Thus, the more temperatures drop below a certain threshold during parts of the year — as currently occurs across most of the United States — the less likely malaria is to occur. This is the primary reason malaria remains confined to the tropical zone today.
"Reintroduction risk despite current absence of malaria"
"TVA and wartime programs that eliminated US malaria"
"Malaria: History." (23 Apr. 2004) CDC Website. Retrieved 21 Apr. 2004 at
You’re 33% through this paper. Sign up to read the remaining 2 sections.
Sign Up Now — Instant Access Already a member? Log inAlways verify citation format against your institution’s current style guide requirements.