ENDEMIC DISEASES
\ɛndˈɛmɪk dɪzˈiːzɪz], \ɛndˈɛmɪk dɪzˈiːzɪz], \ɛ_n_d_ˈɛ_m_ɪ_k d_ɪ_z_ˈiː_z_ɪ_z]\
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The constant presence of diseases or infectious agents within a given geographic area or population group. It may also refer to the usual prevalence of a given disease with such area or group. It includes holoendemic and hyperendemic diseases. A holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holendemic disease). A hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. (Last, A Dictionary of Epidemiology, 3d ed, p53, 78, 80)
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