During 1968–1978 disease ecology fused epidemiology with ecological theory, emphasizing how pathogens shape host population dynamics and extinction risk, especially in island and fragmented ecosystems. The period introduced quantitative tools to characterize parasite aggregation and the influence of parasite burden on host growth, linking individual parasite loads to population trajectories. Stochasticity in transmission and outbreak dynamics gained prominence, with models acknowledging variable contact rates, enabling more realistic epidemic analyses. Field- and lab-based parasite measurements grew practical, improving empirical assessments of parasite burden in ecological studies. Historical Significance: The period's emergence of pathogen-driven extinction as a conservation threat and the formalization of disease ecology as a discipline created a lasting paradigm for studying infectious diseases through ecological lenses. The development of population-level disease models and quantitative frameworks, including modeling parasite aggregation and incorporating host-parasite interactions, established foundational methods that continued to influence subsequent research in conservation and epidemiology. The emphasis on uncertainty, stochasticity, and heterogeneity in transmission anticipated later advances toward uncertainty-aware infectious disease science.