Publications by authors named "N A Hartemink"

Biological control of ticks using entomopathogenic fungi (EPF) is a highly desired alternative to chemical acaricides for the control of tick-borne pathogens. For Metarhizium anisopliae isolate ICIPE 7, one of these EPFs, efficacy against multiple tick species has been demonstrated in laboratory and field settings. However, we currently have little quantitative understanding of how EPFs can impact transmission.

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Bovine tuberculosis (bTB) has a complex infection ecology and is difficult to control in many countries, including Ireland. For many years, the Irish national bTB eradication programme relied on cattle-based control measures, including test-and-removal with related movement restrictions. In the early 2000s, badger culling was added as a part of the control measure in the national programme.

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The incidence of diseases caused by pathogens transmitted by the tick vary over time and space through incompletely understood mechanisms. An important determinant of the disease risk is the density of infected ticks, which is the infection prevalence times the density of questing ticks. We therefore investigated the spatial and temporal variation of four pathogens and one of the most abundant symbionts in in questing nymphs over four years of monthly collections in 12 locations in the Netherlands.

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In large parts of the northern hemisphere, multiple deer species coexist, and management actions can strongly influence wild deer communities. Such changes may also indirectly influence other species in the community, such as small mammals and birds, because deer can have strong effects on their habitats and resources. Deer, small mammals and birds play an important role in the dynamics of tick-borne zoonotic diseases.

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Article Synopsis
  • Bovine tuberculosis (bTB) poses a significant health challenge globally, complicated by the role of wildlife, particularly European badgers, which can spread the disease to cattle.
  • A study seeks to quantify how environmental factors contribute to bTB transmission between cattle and badgers, especially when direct contact is rare, by developing a model that assesses both within-herd and between-species transmission.
  • Results indicate that the environment is a key factor in bTB spread, with a half-life of approximately 177 days, and simulations have generated a risk map that highlights areas with a high likelihood of disease transmission based on badger density.
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