Environmental health and children's exposure risks — formative SAQs

SAQ 1 (10 marks)

You see a 2-year-old for a well visit. Parents recently moved to a rural property with a private well and keep garden pesticides in a shed children can open. [1] [5]

1. Why are toddlers more vulnerable than adults to the same household environment? (3) [3]
2. List six domains you will cover in a structured environmental history. (3) [12]
3. Outline your prevention plan for water and pesticides over the next month. (4) [1] [5]

Model answer

Toddlers take in more air, water and food per kilogram, explore with hands and mouths, and are in critical developmental windows where toxicants can alter long-term trajectories. Immature detoxification and barriers further change internal dose. [3]

Domains (CH2OPD2 or equivalent): community, home, hobbies, caregiver occupation/take-home exposures, personal habits (including pica/mouthing), diet and water, drugs/products/remedies. [12]

Water: arrange private-well testing for microbes, nitrates and locally relevant contaminants; use safe alternate water for formula/drinking if results fail standards; retest after floods or system changes. Pesticides: store only in original labelled containers, locked and out of reach; prefer integrated pest management; never store concentrates in drink bottles; educate on spill response and poison-centre contact. [1] [5]

SAQ 2 (10 marks)

A school-age child has recurrent wheeze that settles when staying with relatives. The rental home has longstanding damp patches and visible mould. Caregivers ask for a “mould toxin blood test” and a detox. [9]

1. What is the priority environmental intervention and why? (3) [9]
2. How do you respond to the request for mould-toxin blood testing and detox? (3) [9] [12]
3. When would you involve public health or specialist environmental/toxicology services? (4) [12]

Model answer

Priority is moisture control and remediation of damp damaged materials (and temporary relocation if the home cannot be made safe), alongside standard asthma care. Damp indoor environments associate with respiratory symptoms; fixing the source reduces ongoing exposure. [9]

Explain that commercial mould-toxin panels and detox products are not the standard pathway. Focus on housing remediation, symptom control, and avoiding caregiver blame for structural rental failure. Offer practical steps and advocacy/housing pathways. [9] [12]

Involve public health/housing services when the hazard is uncontrolled or multi-occupancy; use PEHSU-style or toxicology consultation for complex, unusual or cluster exposures, diagnostic uncertainty, or when environmental investigation exceeds clinic capacity. [12]