REHS Exam Questions with Complete Solutions | 2024

REHS Exam Questions with Complete Solutions | 2024 What is the most common mosquito borne disease in the USA today? - Answer ️️ - Encephalitis What is the primary vector and the infectious agent for Eastern Equine Encephalitis? - Answer ️️ -Culisita species mosquito; Viral What is the primary vector for St. Louis Encephalitis, Western Equine Encephalitis, and West Nile Virus? - Answer ️️ -Culex species mosquito Name the disease caused by Borrelian burgdorferi, symptoms, the wound type, & incubation period. - Answer ️️ -Lyme Disease(meningopolyneuritis);Wound: red spot or bump expanding annularly to ring/bulls eye pattern from tick bite(vector found on Deer, wild rodents); Incubation: 3 to 32 days; fever, fatigue, headache, chronic stiff/painful muscles & joints What is the primary vector, reservoir & incubation period for Yellow Fever? - Answer ️️ - Mode of transmission (vector):Aedes species mosquito; Rsvr: Humans, Aedes aegypti, monkeys; Incubation:3-6 Days. What are the primary vectors for Endemic (Murine) Typhus, Epidemic Typhus, and Scrub Typhus? - Answer ️️ -Endemic: Rat flea, Xenopsylla cheopis; Epidmemic: Body lice, Pediculus humanus; Scrub: bite of infected larval mites Name the specific agent responsible for Endemic Typhus, Epidemic Typhus, and Scrub Typhus. - Answer ️️ -Endemic: Rickettsia typhi (R. mouseri); Epidemic: Rickettsia prowazeki; Scrub: Rickettsia tsutsugamushi Which vertebrates can transmit rabies to human? Which 2 species are the most important reservoir hosts? What is typical incubation in humans? - Answer ️️ -Raccoon, skunks, bats, foxes, dogs, cats, coyotes; Primary reservoir host = bats (from bite or inhaling urine); Secondary reservoir host = skunks; 3-8 weeks What is the bird dieases that affects man? - Answer ️️ -Ornithosis What does a positive blue ring test in milk indicate? - Answer ️️ -Brucellosis What disease is commonly contracted by veterinarians and workers who handle animal hides and animal hair/wool? Name the agent,it's characteristics, & othr resvr. - Answer ️️ -Anthrax (bacillus anthracis); a spore-forming bacteria, spores do not survive thorough cooking but do survive dryness many years; also found in soil & invades bones of animals so in dry bone meal. Name the protozoan parasites responsible for causing Malaria in humans. Which is more dangerous? - Answer ️️ -Plasmodium falciparum (more dangerous), P. vivax, P. malariae, P. ovale Name the spirochete responsible for causing Lyme Disease. What is the primary vector for this disease? - Answer ️️ -Borrelia burgdorferi; Ixodes pacificus in californa(hard-bodied tick); Ixodes dammini in East & midwest U.S. Name the spirochete responsible for causing Relapsing Fever. What is the primary vector for this disease? - Answer ️️ -Borrelia hermsi; Ornithodoros hermsi (soft-bodied tick) What part of the body does Typhoid Fever affect? - Answer ️️ -Circulatory system What disease is caused by water or food contaminated with rat urine or feces? - Answer ️️ - Leptospirosis How does the hookworm usually enter the body? - Answer ️️ -Skin (e.g. walking barefoot) What disease is caused by the black fly? - Answer ️️ -Onchocerciasis (River blindness) What are some fecal-oral transmitted diseases? - Answer ️️ -Shigella, Cholera, Gastroenteritis, Giardia, Cryptosporidiosis, Typhoid Fever, Infectious Hepatitis, Leptospirosis, Amebiasis What ionizing radiation is stopped by paper? - Answer ️️ -Alpha radiati