Much of the research in disease ecology and evolution has traditionally focused on a one host–one parasite framework. And yet, in natural systems, hosts are usually co- infected by multiple parasites, and many parasites can infect several host species. Our research aims to understand how these real-world complexities drive the ecology and evolution of parasites and their hosts.
Individuals are often co-infected by many different parasite species, and within-host interactions between these species may be critical to the fitness and dynamics of these co- infecting parasites. A growing literature emphasises the potential importance of such dynamics to population and community ecology. However, evidence of interactions between co-infecting parasites in natural populations remains equivocal. We explore these questions using two distinct approaches:

(i) Stability and resilience of parasite communities in a wild mouse population

(ii)
Understanding the role of co-infection in the success of treatment strategies and global health policies
The dynamics of infectious disease has often been studied in single host species infected by a single parasite species, and yet the majority of human and primate pathogens, and carnivore and ungulate parasites can actually infect more than one host species. These multi-host pathogens are associated with emerging infectious diseases (EIDs) in humans, agriculture and wildlife around the world. My aim is to understand the general conditions that cause diseases to emerge. This will help guide policies and approaches in important human, animal and plant disease systems.

(i)
Experimental disease emergence: baculoviruses as a model system

(ii)
Historical and future disease emergence in humans and wild primates
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