Volta

Bovine tuberculosis in badgers: sociality, infection and demography in a social mammal

Badgers are an important reservoir of bovine TB in the UK. We discuss how the combination of individual epidemiological data, tracking studies and modelling frameworks enabled exploration of host–pathogen theories in relation to badger life history and disease ecology, focusing on heterogeneity in host susceptibility and infectiousness, two components of the superspreader phenotype. Studies pairing empirical data with modelling approaches suggest sex differences are underpinned by immunological mechanisms. We discuss how studies have moved away from the simplistic assumption of randomly mixing homogeneous populations towards recognition of heterogeneity in host association patterns at group, class and individual levels. Interactions between individuals are non-random with high within-group contacts and lower between-group contact rates. Contact heterogeneity is fundamental to understanding what drives/restricts …

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