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Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
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Related Experiment Video

Updated: Jan 8, 2026

Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
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Public Health.

Pam Factor-Litvak1, Piera Cirillo2, Isha Mhatre-Winters3

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Summary
This summary is machine-generated.

Chronic stress, measured as allostatic load (AL), is linked to lower levels of a key Alzheimer's biomarker in midlife adults. Early interventions targeting AL may reduce Alzheimer's Disease and Related Dementias (ADRD) risk.

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Area of Science:

  • Neuroscience
  • Public Health
  • Biomarkers

Background:

  • Allostatic load (AL) quantifies cumulative physiological stress.
  • Studies on AL and Alzheimer's Disease and Related Dementias (ADRD) often lack ADRD biomarkers.
  • This study examines AL and plasma Aβ 42/40 ratio in a longitudinal birth cohort.

Purpose of the Study:

  • To investigate the association between allostatic load (AL) and plasma Aβ 42/40 ratio.
  • To explore the relationship between individual AL components and plasma Aβ 42/40 ratio.
  • To assess these associations in a mid-life cohort without known memory impairment.

Main Methods:

  • Recruited 367 offspring from a 1960-1963 birth cohort for a 2010 follow-up.
  • Measured plasma Aβ 42/40 ratio using stored midlife blood samples.
  • Assessed AL using 10 biomarkers (metabolic, inflammatory, cardiovascular, neuroendocrine) and logistic regression.

Main Results:

  • Higher AL was significantly associated with an increased risk of low plasma Aβ 42/40 ratio (OR=1.20, p<.01).
  • Metabolic and inflammatory biomarkers were individually linked to Aβ 42/40.
  • Cardiovascular markers showed no association; neuroendocrine markers had borderline associations.

Conclusions:

  • In mid-life adults, allostatic load is associated with plasma Aβ 42/40, an ADRD predictor.
  • Routine health screening biomarkers for AL could inform early ADRD risk reduction.
  • Further research is needed to confirm these findings and their implications for intervention.