Case Study

Directions: After reading the Centers for Disease Control and Prevention case study, answer the following questions.

Case Study: “Cross-sectional Exposure Assessment of Environmental Contaminants in Churchill County, Nevada” by the Centers for Disease Control and Prevention.t   http://www.cdc.gov/nceh/clusters/fallon/factsheet.pdf

1. Identify the agent:_____________________________________________________
2. What type of agent is described?

biological

chemical

1. Source:

anthropogenic   non-anthropogenic

area   point

stationary   mobile

indoor  outdoor

1. Transport/carrier medium:

air

water

soil

dust

food product item

1. Exposure pathways:

eating contaminated food

breathing contaminated air

touching a contaminated surface

drinking contaminated water

1. Exposure concentration:

mg/kg (food)   mg/litre (water)

ug/m3 (air)    ug/cm3 (contaminated surfaces)

% by weight   fibres/m3 (air)

1. Exposure route:

inhalation    dermal contact

ingestion   multiple routes

1. Exposure frequency:

continuous    intermittent

cyclic   random

rare

1. Exposure duration:

seconds    minutes

hours   days

weeks   months

years   lifetime

1. Exposure setting:

occupational   non-occupational

residential  non-residential

indoors   outdoors

1. Exposed population:

general population

population subgroups

individuals

1. Geographic scope:

site    specific

local   regional

national   international

global