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REHS Study Guide Questions with Complete Solutions
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REHS Study Guide Questions withComplete Solutions
What is the depth at which flies can emerge from a landfill? - -6 inches
compacted and 5 inches noncompacted
-Why is the use of cooper sulfate crystals recommended for some septic
tanks systems - -It will destroy roots that the solutions comes in contact with
-What is the overall purpose of bar screens, comminutors, and grit chambers
when it comes to wastewater treatment? - -It removes larger solid
-What is the most plentiful form of available water? - -Groundwater
-What are Waterborne Diseases? - -Results from ingestion of water that is
harboring a pathogen example: Typhoid fever.
-What are Water-washed Diseases? - -Spread by fecal-oral route or person
to person contact. Facilitated by lack of personal hygiene.
-What are Water-based Diseases? - -Caused by infection arising through
ingestion of pathogenic agent Example: guinea worm larvae, Termatode
larvae.
-What are Water-related Diseases? - -Facilitated by insects vector that
breed in water: example filariastus abthropods that carry Dengue fever.
-What are Inhalation of contaminated water aerosols? - -Legionella
Pneumophila
-What is the ecologic agent of cyclosporiasis? - -Cyclospora Cayetanensis
-What food is associated with cyclosporiasis? - -Imported Raspberries,
Lettuce form South America
-Most waterborne disease fatalities occurred before 1940 and were
attributed to the waterborne illness? - -Typhoid Fever
-Waters suitable for drinking water supplies and shellfish rearing are
monitored routinely for? - -Microbiological Quality
-Only what % of the global content of water constitutes fresh water? - -2.6
or 3 Percent
, -What is a waterborne disease that can be prevented through vaccinations
is ? - -Typhoid Fever or Cholera
-The World Health Organization (WHO) estimates that ______% of all diseases
are attributable to inadequate water or sanitation - -80 Percent
-Viral infections readily spread through drinking water, food and water-
contact recreation activities due to what? - -The low infectious dose for
pathogenic viruses and protoza.
-Shigellosis: - -A bacteria
-What is the specific agent for shingellosis? - -Genus shingella Example:
flexneri, sonnei, boydlii, and dysenteriae
-What is the Reservoir for shingellosis? - -Feces of carriers and infected
persons
-What are the symptoms of shingellosis? - -Acute onset with diarrhea, fever,
tenesmus, frequent stools containing blood and mucus.
-What is the incubation for shingellosis? - -1-7 days, usually less than 4 days
-Botulism - -Bacterial toxin
-What is the specific agent for botulism? - -Clostridium botulinum and c para
botulinum that produce toxins
-What is the reservoir for botulism? - -Soil, dust, fruits, veggies, food, mud,
fish, animals and human feces.
-What are the symptoms of botulism? - -GI pain, diarrhea or constipation,
prostration, difficulty swallowing, double vision, difficulty in respiration.
-What is the incubation period of botulism? - -2 hours to 8 days, usually 12-
36 hours
-Bacillus Cereus Food poisioning (Emetic Type) - -Emetic= vomiting
bacterial toxins
-What are the specific agent for Bacillus Cereus (Emetic Type)? - -Bacillus
Cereus, Toxins heat stable
-What is the reservoir for Bacillus Cereus (Emetic Type)? - -Spores found in
wide variety of cereals, spices, veggies, and milk.
, -What are the symptoms for Bacillus Cereus (Emetic Type)? - -Vomiting,
diarrhea, and nausea
-What is the incubation period for Bacillus Cereus (Emetic Type)? - -1- 6
hours
-Bacillus Cereus Food poisioning (Diarrheal Type) - -Bacterial toxins
-What is the specific agent for Bacillus Cereus Food poisioning (Diarrheal
Type)? - -Bacillus cereus, toxin heat stable
-What is the reservoir for Bacillus Cereus Food poisioning (Diarrheal Type)? -
-Spores found in wide variety of cereals, spices, veggies, and milk.
-What are the symptoms for Bacillus Cereus Food poisioning (Diarrheal
Type)? - -Diarrhea, cramps, and vomiting sometimes
-What is the incubation period for Bacillus Cereus Food poisioning (Diarrheal
Type)? - -6-16 hours
-Typhoid Fever - -Bacteria
-What is the specific agent for typhoid fever? - -Typhoid bacillus, salmonella
typhi
-What is the reservoir for typhoid fever? - -Feces and urine of typhoid
carrier in patient
-What are the symptoms of typhoid fever? - -General infection
characterized by continued fever, usually rose spots on the trunk and
diarrhea disturbances.
-What is the incubation period for typhoid fever? - -Average 14 days, usually
7-21 days
-Campylobacter Enteritis - -Bacteria
-What is the specific agent of Campylobacter Enteritis - -Campylobactor
Jejuni
-What is the reservoir of Campylobacter Enteritis? - -Chickens, swine, dogs,
cats, human, raw milk, contaminated H2O
-What are the symptoms of Campylobacter Enteritis? - -Watery diarrhea,
abdominal pain, fever, chills, nausea, vomiting, blood in stool
, -What is the incubation period for Campylobacter Enteritis? - -1- 10 days, 2-
5 days average
-Amebiasis - -Protozoa
-What is the specific agent for amebiasis? - -Entamoeba histoltica
-What is the reservoir for amebiasis? - -Bowel discharge of carriers, and
infected persons, possibly rats
-What are the symptoms of amebiasis? - -Insidious and undermined onset of
diarrhea or constipation, loss of appetite, abdominal discomfort, and blood
mucus in stool
-What is the incubation period of amebiasis? - -5 days or longer, average 2-
4 weeks
-Staphylococcus Food Poisoning - -Bacterial Toxins
-What is the specific agent of Staphylococcus Food Poisoning? - -
Staphylococci that produces entero-toxin, staphylococcus aureus toxin is
stable at boiling temperature
-What are the reservoir of Staphylococcus Food Poisoning? - -Skin, mucus
membranes, pus, dust, air, sputum and throat
-What are the symptoms of Staphylococcus Food Poisoning? - -Acute
nausea, vomiting and prostration, diarrhea, abdominal cramps usually
explosive in nature, followed by recovery.
-What is the incubation period of Staphylococcus Food Poisoning? - -1-6
hours or longer, average 2-4 hours
-Cholera - -Bacteria
-What is the specific agent of cholera? - -Vibrio Comma
-What is the reservoir of cholera? - -Feces, vomitus carriers
-What are the symptoms of cholera? - -Diarrhea, rice-water stools, vomiting,
thirst, pain and coma
-What is the incubation period of cholera? - -A few hours- 5 days, usually 3
days
-Yersiniosis - -Bacteria
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