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REHS
environmental
| Term | Definition |
|---|---|
| What is another name for Woolsorters Diseas | Anthrax |
| What is the vector and disease caused by West Nile Virus | Vector: Culex mosquito. Disease: Encephalitis |
| What causes Rocky Mountain Spotted Fever | Bacteria: Rickettsia rickettsii. Vector: Ticks |
| What causes Tularemia | Bacteria: Francisella tularensis. Vector: Ticks, deer flies, rabbits |
| What causes Trypanosomiasis | Protozoa: Trypanosoma. Vector: Tsetse fly |
| Why are Cryptosporidium, Giardia, Salmonella, Shigella, E. coli, and Enterovirus common in daycares | Because of fecal-oral transmission, diaper changes, poor hand hygiene, and high contact rates among children. |
| What does the Total Coliform Rule require | Coliform testing in the distribution system. Applies to all PWSs. |
| What is the standard incubation for E. coli fecal coliform test | 112°F for 24 hours |
| What causes turbidity in drinking water | Suspended materials (clay, silt, organic matter) |
| How are odors in drinking water controlled | Activated carbon adsorption, chlorination, and coagulation |
| What disease does Pseudomonas aeruginosa cause | Swimmer's itch, dermatitis, UTI in immunocompromised |
| What disease does Legionella pneumophila cause | Legionnaire disease (40% fatality), Pontiac fever (milder) |
| How is Salmonella typhi transmitted | Contaminated food/water, especially oysters, veggies, flies |
| What is the infectious dose for Giardia | 5+ cysts |
| What does Naegleria fowleri cause | PAM (Primary Amoebic Meningoencephalitis); enters via nasal passages |
| What does MCL stand for | Maximum Contaminant Level |
| What is the MCL for Nitrate | 10 ppm |
| Which chemical causes Blue-Baby Syndrome | Nitrate (via nitrite formation) |
| What does the MBAS assay detect | Methylene Blue Active Substances, indicates sewage pollution |
| What are effects of VOCs like Benzene and Toluene | Cancer, CNS damage, kidney/liver damage |
| What is Wellhead Protection | Program to protect groundwater under SDWA (1986 amendment) |
| What % of CWSs use groundwater | 80% |
| What are eutrophic lakes like | High nutrients, algae blooms, low oxygen, mature lakes |
| What is the Stream Zone of Active Decomposition | Most polluted zone, near-zero oxygen, foul odors |
| What does the MBAS Assay indicate | Presence of detergents or sewage pollution |
Created by:
Emilton
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