We discussed an example of exposure assessment with the case study of formaldehyde exposure in individuals living in FEMA trailers following Hurricane Katrina in 2005. The CDC came in and did air monitoring. In order to assess exposure, they needed to… (mark all that are correct).

Question

We discussed an example of exposure assessment with the case study of formaldehyde exposure in individuals living in FEMA trailers following Hurricane Katrina in 2005.  The CDC came in and did air monitoring.  In order to assess exposure, they needed to… (mark all that are correct).

BlackTom AI · Accepted Answer

The question describes the FEMA trailer exposure scenario after Hurricane Katrina and asks which steps the CDC would need to take to assess exposure, marking all that are correct.
Option 1: 'Estimate how much of the day people were staying in their trailers.' This is relevant because exposure assessment often requires information on time-activity patterns to determine the duration of exposure. Knowing how much of the day residents spend inside the trailers helps quantify potential inhalation exposure to formaldehyde.
Option 2: 'Measure the level of formaldehyde in the air of the trailers.' Direct environmental monitoring is central to exposure assessment. By measuring the ambient formaldehyde concentration in the living spaces, you can estimate the intensity component of exposure and compare it to health-based guidelines.
Option 3: 'Know the occupations of the people living in the trailers.' While useful for certain occupational exposure assessments, this information is not directly necessary for assessing residents' exposure to formaldehyde in their own living environment in this context. It does not contribute to calculating inhaled dose from residential exposure.
Option 4: 'Determine if particle board in the trailers was the only source of formaldehyde.' This is overly restrictive and potentially misleading. Even if particle board is a major source, other sources (such as plywood, insulation, furnishing materials, or combustion byproducts) could contribute to formaldehyde levels. The question is about assessing exposure, which typically requires measuring actual concentrations rather than presuming a single source.
Option 5: 'Consider other health issues with people living in the trailers.' While holistic health considerations are important for public health responses, this specific step does not directly advance the exposure assessment for formaldehyde in air. It’s more about health surveillance and risk characterization than the actual measurement of exposure levels.
In summary, the core actions that directly support exposure assessment in this scenario are estimating time spent in the exposure environment (time-activity data) and measuring the contaminant concentration in the environment. The other options, while potentially relevant in broader health contexts, do not directly address the fundamental exposure assessment measurements needed here.

PUBHP6040_001_2025_3 - DETERMINANTS OF HEALTH 2025 Week 9 - Learning Check

We discussed an example of exposure assessment with the case study of formaldehyde exposure in individuals living in FEMA trailers following Hurricane Katrina in 2005. The CDC came in and did air monitoring. In order to assess exposure, they needed to… (mark all that are correct).

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