Final answer:
Recent camping trips can help determine Giardia lamblia infection source, while raw egg consumption is not directly related.
Explanation:
Recent camping trips can be used to determine the source of infection in a client who tests positive for Giardia lamblia as backpackers and campers who drink untreated water from lakes or rivers are at a higher risk of contracting the parasite. The transmission of Giardia lamblia occurs via a fecal-oral route, and people who spend time outdoors, especially during summer, are more susceptible.
Raw egg consumption is not a direct factor in determining the source of Giardia lamblia infection, as the parasite spreads through contaminated food or water and not specifically through eggs. Past antibiotic use is also not a relevant factor in identifying the source of Giardia lamblia infection.
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