REHS Study Guide Exam With Correct
Questions And Answers 2025
What is the most plentiful form of available water? - CORRECT ANSWERS-
Groundwater
What are Waterborne Diseases? - CORRECT ANSWERS-Results from ingestion of
water that is harboring a pathogen example: Typhoid fever.
What are Water-washed Diseases? - CORRECT ANSWERS-Spread by fecal-oral
route or person to person contact. Facilitated by lack of personal hygiene.
What are Water-based Diseases? - CORRECT ANSWERS-Caused by infection
arising through ingestion of pathogenic agent Example: guinea worm larvae,
Termatode larvae.
What are Water-related Diseases? - CORRECT ANSWERS-Facilitated by insects
vector that breed in water: example filariastus abthropods that carry Dengue
fever.
What are Inhalation of contaminated water aerosols? - CORRECT ANSWERS-
Legionella Pneumophila
What is the ecologic agent of cyclosporiasis? - CORRECT ANSWERS-Cyclospora
Cayetanensis
What food is associated with cyclosporiasis? - CORRECT ANSWERS-Imported
Raspberries, Lettuce form South America
Most waterborne disease fatalities occurred before 1940 and were attributed to
the waterborne illness? - CORRECT ANSWERS-Typhoid Fever
Waters suitable for drinking water supplies and shellfish rearing are monitored
routinely for? - CORRECT ANSWERS-Microbiological Quality
Only what % of the global content of water constitutes fresh water? - CORRECT
ANSWERS-2.6 or 3 Percent
What is a waterborne disease that can be prevented through vaccinations is ? -
CORRECT ANSWERS-Typhoid Fever or Cholera
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,The World Health Organization (WHO) estimates that ______% of all diseases are
attributable to inadequate water or sanitation - CORRECT ANSWERS-80 Percent
Viral infections readily spread through drinking water, food and water-contact
recreation activities due to what? - CORRECT ANSWERS-The low infectious dose
for pathogenic viruses and protoza.
Shigellosis: - CORRECT ANSWERS-A bacteria
What is the specific agent for shingellosis? - CORRECT ANSWERS-Genus
shingella Example: flexneri, sonnei, boydlii, and dysenteriae
What is the Reservoir for shingellosis? - CORRECT ANSWERS-Feces of carriers
and infected persons
What are the symptoms of shingellosis? - CORRECT ANSWERS-Acute onset with
diarrhea, fever, tenesmus, frequent stools containing blood and mucus.
What is the incubation for shingellosis? - CORRECT ANSWERS-1-7 days, usually
less than 4 days
Botulism - CORRECT ANSWERS-Bacterial toxin
What is the specific agent for botulism? - CORRECT ANSWERS-Clostridium
botulinum and c para botulinum that produce toxins
What is the reservoir for botulism? - CORRECT ANSWERS-Soil, dust, fruits,
veggies, food, mud, fish, animals and human feces.
What are the symptoms of botulism? - CORRECT ANSWERS-GI pain, diarrhea or
constipation, prostration, difficulty swallowing, double vision, difficulty in
respiration.
What is the incubation period of botulism? - CORRECT ANSWERS-2 hours to 8
days, usually 12-36 hours
Bacillus Cereus Food poisioning (Emetic Type) - CORRECT ANSWERS-Emetic=
vomiting bacterial toxins
What are the specific agent for Bacillus Cereus (Emetic Type)? - CORRECT
ANSWERS-Bacillus Cereus, Toxins heat stable
What is the reservoir for Bacillus Cereus (Emetic Type)? - CORRECT ANSWERS-
Spores found in wide variety of cereals, spices, veggies, and milk.
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,What are the symptoms for Bacillus Cereus (Emetic Type)? - CORRECT
ANSWERS-Vomiting, diarrhea, and nausea
What is the incubation period for Bacillus Cereus (Emetic Type)? - CORRECT
ANSWERS-1- 6 hours
Bacillus Cereus Food poisioning (Diarrheal Type) - CORRECT ANSWERS-Bacterial
toxins
What is the specific agent for Bacillus Cereus Food poisioning (Diarrheal Type)? -
CORRECT ANSWERS-Bacillus cereus, toxin heat stable
What is the reservoir for Bacillus Cereus Food poisioning (Diarrheal Type)? -
CORRECT ANSWERS-Spores found in wide variety of cereals, spices, veggies,
and milk.
What are the symptoms for Bacillus Cereus Food poisioning (Diarrheal Type)? -
CORRECT ANSWERS-Diarrhea, cramps, and vomiting sometimes
What is the incubation period for Bacillus Cereus Food poisioning (Diarrheal
Type)? - CORRECT ANSWERS-6-16 hours
Typhoid Fever - CORRECT ANSWERS-Bacteria
What is the specific agent for typhoid fever? - CORRECT ANSWERS-Typhoid
bacillus, salmonella typhi
What is the reservoir for typhoid fever? - CORRECT ANSWERS-Feces and urine
of typhoid carrier in patient
What are the symptoms of typhoid fever? - CORRECT ANSWERS-General
infection characterized by continued fever, usually rose spots on the trunk and
diarrhea disturbances.
What is the incubation period for typhoid fever? - CORRECT ANSWERS-Average
14 days, usually 7-21 days
Campylobacter Enteritis - CORRECT ANSWERS-Bacteria
What is the specific agent of Campylobacter Enteritis - CORRECT ANSWERS-
Campylobactor Jejuni
What is the reservoir of Campylobacter Enteritis? - CORRECT ANSWERS-
Chickens, swine, dogs, cats, human, raw milk, contaminated H2O
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, What are the symptoms of Campylobacter Enteritis? - CORRECT ANSWERS-
Watery diarrhea, abdominal pain, fever, chills, nausea, vomiting, blood in stool
What is the incubation period for Campylobacter Enteritis? - CORRECT
ANSWERS-1- 10 days, 2-5 days average
Amebiasis - CORRECT ANSWERS-Protozoa
What is the specific agent for amebiasis? - CORRECT ANSWERS-Entamoeba
histoltica
What is the reservoir for amebiasis? - CORRECT ANSWERS-Bowel discharge of
carriers, and infected persons, possibly rats
What are the symptoms of amebiasis? - CORRECT ANSWERS-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? - CORRECT ANSWERS-5 days or
longer, average 2-4 weeks
Staphylococcus Food Poisoning - CORRECT ANSWERS-Bacterial Toxins
What is the specific agent of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-Staphylococci that produces entero-toxin, staphylococcus aureus
toxin is stable at boiling temperature
What are the reservoir of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-Skin, mucus membranes, pus, dust, air, sputum and throat
What are the symptoms of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-Acute nausea, vomiting and prostration, diarrhea, abdominal cramps
usually explosive in nature, followed by recovery.
What is the incubation period of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-1-6 hours or longer, average 2-4 hours
Cholera - CORRECT ANSWERS-Bacteria
What is the specific agent of cholera? - CORRECT ANSWERS-Vibrio Comma
What is the reservoir of cholera? - CORRECT ANSWERS-Feces, vomitus carriers
What are the symptoms of cholera? - CORRECT ANSWERS-Diarrhea, rice-water
stools, vomiting, thirst, pain and coma
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Questions And Answers 2025
What is the most plentiful form of available water? - CORRECT ANSWERS-
Groundwater
What are Waterborne Diseases? - CORRECT ANSWERS-Results from ingestion of
water that is harboring a pathogen example: Typhoid fever.
What are Water-washed Diseases? - CORRECT ANSWERS-Spread by fecal-oral
route or person to person contact. Facilitated by lack of personal hygiene.
What are Water-based Diseases? - CORRECT ANSWERS-Caused by infection
arising through ingestion of pathogenic agent Example: guinea worm larvae,
Termatode larvae.
What are Water-related Diseases? - CORRECT ANSWERS-Facilitated by insects
vector that breed in water: example filariastus abthropods that carry Dengue
fever.
What are Inhalation of contaminated water aerosols? - CORRECT ANSWERS-
Legionella Pneumophila
What is the ecologic agent of cyclosporiasis? - CORRECT ANSWERS-Cyclospora
Cayetanensis
What food is associated with cyclosporiasis? - CORRECT ANSWERS-Imported
Raspberries, Lettuce form South America
Most waterborne disease fatalities occurred before 1940 and were attributed to
the waterborne illness? - CORRECT ANSWERS-Typhoid Fever
Waters suitable for drinking water supplies and shellfish rearing are monitored
routinely for? - CORRECT ANSWERS-Microbiological Quality
Only what % of the global content of water constitutes fresh water? - CORRECT
ANSWERS-2.6 or 3 Percent
What is a waterborne disease that can be prevented through vaccinations is ? -
CORRECT ANSWERS-Typhoid Fever or Cholera
1|Page
,The World Health Organization (WHO) estimates that ______% of all diseases are
attributable to inadequate water or sanitation - CORRECT ANSWERS-80 Percent
Viral infections readily spread through drinking water, food and water-contact
recreation activities due to what? - CORRECT ANSWERS-The low infectious dose
for pathogenic viruses and protoza.
Shigellosis: - CORRECT ANSWERS-A bacteria
What is the specific agent for shingellosis? - CORRECT ANSWERS-Genus
shingella Example: flexneri, sonnei, boydlii, and dysenteriae
What is the Reservoir for shingellosis? - CORRECT ANSWERS-Feces of carriers
and infected persons
What are the symptoms of shingellosis? - CORRECT ANSWERS-Acute onset with
diarrhea, fever, tenesmus, frequent stools containing blood and mucus.
What is the incubation for shingellosis? - CORRECT ANSWERS-1-7 days, usually
less than 4 days
Botulism - CORRECT ANSWERS-Bacterial toxin
What is the specific agent for botulism? - CORRECT ANSWERS-Clostridium
botulinum and c para botulinum that produce toxins
What is the reservoir for botulism? - CORRECT ANSWERS-Soil, dust, fruits,
veggies, food, mud, fish, animals and human feces.
What are the symptoms of botulism? - CORRECT ANSWERS-GI pain, diarrhea or
constipation, prostration, difficulty swallowing, double vision, difficulty in
respiration.
What is the incubation period of botulism? - CORRECT ANSWERS-2 hours to 8
days, usually 12-36 hours
Bacillus Cereus Food poisioning (Emetic Type) - CORRECT ANSWERS-Emetic=
vomiting bacterial toxins
What are the specific agent for Bacillus Cereus (Emetic Type)? - CORRECT
ANSWERS-Bacillus Cereus, Toxins heat stable
What is the reservoir for Bacillus Cereus (Emetic Type)? - CORRECT ANSWERS-
Spores found in wide variety of cereals, spices, veggies, and milk.
2|Page
,What are the symptoms for Bacillus Cereus (Emetic Type)? - CORRECT
ANSWERS-Vomiting, diarrhea, and nausea
What is the incubation period for Bacillus Cereus (Emetic Type)? - CORRECT
ANSWERS-1- 6 hours
Bacillus Cereus Food poisioning (Diarrheal Type) - CORRECT ANSWERS-Bacterial
toxins
What is the specific agent for Bacillus Cereus Food poisioning (Diarrheal Type)? -
CORRECT ANSWERS-Bacillus cereus, toxin heat stable
What is the reservoir for Bacillus Cereus Food poisioning (Diarrheal Type)? -
CORRECT ANSWERS-Spores found in wide variety of cereals, spices, veggies,
and milk.
What are the symptoms for Bacillus Cereus Food poisioning (Diarrheal Type)? -
CORRECT ANSWERS-Diarrhea, cramps, and vomiting sometimes
What is the incubation period for Bacillus Cereus Food poisioning (Diarrheal
Type)? - CORRECT ANSWERS-6-16 hours
Typhoid Fever - CORRECT ANSWERS-Bacteria
What is the specific agent for typhoid fever? - CORRECT ANSWERS-Typhoid
bacillus, salmonella typhi
What is the reservoir for typhoid fever? - CORRECT ANSWERS-Feces and urine
of typhoid carrier in patient
What are the symptoms of typhoid fever? - CORRECT ANSWERS-General
infection characterized by continued fever, usually rose spots on the trunk and
diarrhea disturbances.
What is the incubation period for typhoid fever? - CORRECT ANSWERS-Average
14 days, usually 7-21 days
Campylobacter Enteritis - CORRECT ANSWERS-Bacteria
What is the specific agent of Campylobacter Enteritis - CORRECT ANSWERS-
Campylobactor Jejuni
What is the reservoir of Campylobacter Enteritis? - CORRECT ANSWERS-
Chickens, swine, dogs, cats, human, raw milk, contaminated H2O
3|Page
, What are the symptoms of Campylobacter Enteritis? - CORRECT ANSWERS-
Watery diarrhea, abdominal pain, fever, chills, nausea, vomiting, blood in stool
What is the incubation period for Campylobacter Enteritis? - CORRECT
ANSWERS-1- 10 days, 2-5 days average
Amebiasis - CORRECT ANSWERS-Protozoa
What is the specific agent for amebiasis? - CORRECT ANSWERS-Entamoeba
histoltica
What is the reservoir for amebiasis? - CORRECT ANSWERS-Bowel discharge of
carriers, and infected persons, possibly rats
What are the symptoms of amebiasis? - CORRECT ANSWERS-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? - CORRECT ANSWERS-5 days or
longer, average 2-4 weeks
Staphylococcus Food Poisoning - CORRECT ANSWERS-Bacterial Toxins
What is the specific agent of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-Staphylococci that produces entero-toxin, staphylococcus aureus
toxin is stable at boiling temperature
What are the reservoir of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-Skin, mucus membranes, pus, dust, air, sputum and throat
What are the symptoms of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-Acute nausea, vomiting and prostration, diarrhea, abdominal cramps
usually explosive in nature, followed by recovery.
What is the incubation period of Staphylococcus Food Poisoning? - CORRECT
ANSWERS-1-6 hours or longer, average 2-4 hours
Cholera - CORRECT ANSWERS-Bacteria
What is the specific agent of cholera? - CORRECT ANSWERS-Vibrio Comma
What is the reservoir of cholera? - CORRECT ANSWERS-Feces, vomitus carriers
What are the symptoms of cholera? - CORRECT ANSWERS-Diarrhea, rice-water
stools, vomiting, thirst, pain and coma
4|Page
