REHS EXAM Question and Answer 2026
| Verified Questions and Answer Key |
Grade A+
• Rabies. CORRECT ANSWER: an acute viral infection that is most commonly
transmitted to humans by the bite or saliva of an infected animal
skunks, raccoons, bats, foxes
incubation: weeks to months
• Tularemia. CORRECT ANSWER: agent: Francisella tularensis
vector: most ticks and Aedes
reservoir: rabbits and beavers
cause: often consuming or working with contaminated meat
symptoms: ulcers at infection site, headache, chills, and high temperature
• Hantavirus. CORRECT ANSWER: RNA virus
causes pulmonary syndrome, coughing, etc
transmitted by aerosolized feces, urine, or bites
cover and wet droppings before cleaning, wear a mask
50% fatality
• Salmonellosis. CORRECT ANSWER: animals, poultry, people
nausea, vomiting, cramps, fever, headache, diarrhea
multiple types
organisms enter gut epithelium through lumen and cause inflammation
• Rat Bite Fever. CORRECT ANSWER: through bite of rat infected with
Streptobacillus moniliformis
febrile symptoms
• Cat Scratch Fever. CORRECT ANSWER: agent: Bartonella henselae
vector: fleas
reservoir: cats
transmitted by oral-skin route (licking, biting, etc)
causes swelling, enlarged lymph nodes, exhaustion, fever, etc
, • Leptospirosis (Weil's Disease). CORRECT ANSWER: agent: Leptospira
incetrohaemorrahagiae
reservoir: rats/farm animals
contact with infected rodent urine and enters through mucous membranes
mild to severe febrile illness, rarely fatal
• Psittacosis. CORRECT ANSWER: from bird poop; AKA parrot fever
caused by chlamydophila psittaci
will have fever, chills, muscle aches, dry cough and often pneumonia
• Toxoplasmosis. CORRECT ANSWER: foodborne (undercooked meat, fish, milk) or
through cat contact, congenital if pregnant
often no symptoms
protozoa
• Malaria. CORRECT ANSWER: agent: Plasmodium spp. (parasites)
vector: Anopheles mosquitoes
symptoms: fever, chills, sweats, headache, shock, kidney failure, encephalitis,
coma
• Encephalitis. CORRECT ANSWER: includes Eastern Equine, West Nile, and St.
Louis encephalitis
symptoms: inflammation in brain stem/meninges, headaches, fever, stupor, and
disorientation
agents: togaviruses
vectors: Culex and Culiseta mosquitoes
• Yellow Fever. CORRECT ANSWER: agent: B togaviruses
vector: Aedes aegypti
symptoms: fever, headache, backache, prostration, nausea, vomiting, jaundice
• Dengue Fever. CORRECT ANSWER: agent: Flavivirus spp.
vector: Aedes mosquitos
reservoir: people, mosquitoes, monkeys
symptoms: fever, headache, joint/muscle pain, rash, prolonged fatigued
| Verified Questions and Answer Key |
Grade A+
• Rabies. CORRECT ANSWER: an acute viral infection that is most commonly
transmitted to humans by the bite or saliva of an infected animal
skunks, raccoons, bats, foxes
incubation: weeks to months
• Tularemia. CORRECT ANSWER: agent: Francisella tularensis
vector: most ticks and Aedes
reservoir: rabbits and beavers
cause: often consuming or working with contaminated meat
symptoms: ulcers at infection site, headache, chills, and high temperature
• Hantavirus. CORRECT ANSWER: RNA virus
causes pulmonary syndrome, coughing, etc
transmitted by aerosolized feces, urine, or bites
cover and wet droppings before cleaning, wear a mask
50% fatality
• Salmonellosis. CORRECT ANSWER: animals, poultry, people
nausea, vomiting, cramps, fever, headache, diarrhea
multiple types
organisms enter gut epithelium through lumen and cause inflammation
• Rat Bite Fever. CORRECT ANSWER: through bite of rat infected with
Streptobacillus moniliformis
febrile symptoms
• Cat Scratch Fever. CORRECT ANSWER: agent: Bartonella henselae
vector: fleas
reservoir: cats
transmitted by oral-skin route (licking, biting, etc)
causes swelling, enlarged lymph nodes, exhaustion, fever, etc
, • Leptospirosis (Weil's Disease). CORRECT ANSWER: agent: Leptospira
incetrohaemorrahagiae
reservoir: rats/farm animals
contact with infected rodent urine and enters through mucous membranes
mild to severe febrile illness, rarely fatal
• Psittacosis. CORRECT ANSWER: from bird poop; AKA parrot fever
caused by chlamydophila psittaci
will have fever, chills, muscle aches, dry cough and often pneumonia
• Toxoplasmosis. CORRECT ANSWER: foodborne (undercooked meat, fish, milk) or
through cat contact, congenital if pregnant
often no symptoms
protozoa
• Malaria. CORRECT ANSWER: agent: Plasmodium spp. (parasites)
vector: Anopheles mosquitoes
symptoms: fever, chills, sweats, headache, shock, kidney failure, encephalitis,
coma
• Encephalitis. CORRECT ANSWER: includes Eastern Equine, West Nile, and St.
Louis encephalitis
symptoms: inflammation in brain stem/meninges, headaches, fever, stupor, and
disorientation
agents: togaviruses
vectors: Culex and Culiseta mosquitoes
• Yellow Fever. CORRECT ANSWER: agent: B togaviruses
vector: Aedes aegypti
symptoms: fever, headache, backache, prostration, nausea, vomiting, jaundice
• Dengue Fever. CORRECT ANSWER: agent: Flavivirus spp.
vector: Aedes mosquitos
reservoir: people, mosquitoes, monkeys
symptoms: fever, headache, joint/muscle pain, rash, prolonged fatigued
