What is the symbolism of mosquitoes in the novel, The Old Drift?

The mosquitos represent the connection between nature and humanity in the novel. As creatures which bite and take blood from humans, they are an interface between the natural world and humanity. Thus, they reflect on the role of accident in evolution and history. As an interface between humans and nature, mosquitos also become the primary site of human intervention in nature, emblematized by the Moskeetoze drones used to inject the Zambian population with a gene-altering HIV vaccine.