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LAT FINAL EXAM (ACTUAL 2026)
QUESTIONS AND ACCURATE ANSWERS
A barrier animal facility has special provisions for traffic flow. What direction should airflow be inside the room to prevent transmission of airborne viruses and bacteria? a) Positive pressure b) Negative pressure c) Balanced pressure between room and hallway d) Either positive or negative because there are no airborne diseases A Which of the following definitions best describes the term "Class A" dealer? a) Dealer which is only involved with showing or displaying animals b) Dealer which purchases and resells animals for research c) Dealer that only breeds and raises animals for research purposes d) Dealer that only sells animals to pharmaceutical companies C
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The period begins when surgery is complete and ends when the animal is released to the investigator's care. a) Post-anesthetic b) Pre-operative c) Pre-surgical d) Post-operative D Injecting a local anesthetic close to a nerve desensitizes the entire area controlled by the nerve. This procedure is commonly referred to as a . a) Nerve block b) Neuropathy c) Neurologic analgesia d) Neuroma A
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a) Guinea pigs b) Gerbils c) Chinchillas d) Hamsters A The normal gestation length for the rabbit is days. a) 19- 21 b) 24- 26 c) 31- 33 d) 42- C breeding occurs when two different inbred strains are allowed to mate. Their offspring are referred to as the F generation. a) Recombinant Inbred b) Hybrid c) Random d) Polygamous
ACCURATE ANSWERS
B
Which of the following bacterial organisms is commonly used as a biological indicator for testing adequate sterilization in an autoclave? a) Bacillus piliformis b) Staphylococcus aureus c) Borrelia burgdorferi d) Bacillus stearothermophilus D An unusual behavior that may be noticed in approximately 20% of gerbils is . a) Circling b) Seizures c) Stomping d) Hibernation B
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d) Intraperitoneal A What is the main difference between gnotobiotic and germfree animals? a) There is no difference b) Gnotobiotic animals are given specific bacteria to aid in digestion c) Gnotobiotic animals are raised in isolators d) Germfree animals are only free of viruses B In birds, the reproductive, digestive and urinary tracts all terminate in a common opening known as the. a) Crop b) Cloaca c) Ceca d) Carapace B
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Animals that are known to be free of specific pathogens, but may not be free of other pathogens are called? a) SPF b) VAF c) Germfree d) Defined flora A Any living thing which can carry a disease is known as a? a) Contagion b) Fomite c) Vector d) Index case C A special dietary component for birds that is composed of oyster shell and granite is called. a) grit
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Which of the following is a vector? a) Mosquito b) Broom c) Lab coat d) Cage A What is the recommended acclimation period for rodents to recover from the stress of shipment? a) None b) 24 hours c) 48 hours d) 72 hours C The scientific name of the guinea pig is. a) Mesocricetus auratus b) Rattus norvegicus c) Mus musculus
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d) Cavia porcellus D Which of the following nutrients is essential for guinea pigs, nonhuman primates and humans to prevent the development of scurvy? a) Vitamin B b) Vitamin C c) Vitamin K d) Vitamin E B The scientific name of the common laboratory mouse is . a) Mesocricetus auratus b) Rattus norvegicus c) Mus musculus d) Cavia porcellus C What type of diet has the nutrients analyzed and measured for
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d) Either positive or negative B In a rodent-breeding colony, which type of breeding scheme should be used to obtain minimal heterozygosity in the shortest period of time? a) outbreeding b) inbreeding c) cross breeding d) monogamous breeding B What term is used to identify normal healthy rodents that receive dirty bedding from experimental animals for the purpose of disease surveillance? a) Tactical b) Sentinel c) Surveillance d) Patrol B
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The principal method for detecting viral infections in sentinel animals is . a) Histopathology b) Bacteriology c) DNA analysis d) Serologic testing D The scientific name of the domestic pig is . a) Capra hircus b) Ovis aries c) Sus scrofa d) Cavia porcellus C Which common respiratory pathogen of dogs and rabbits may cause
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c) MPV d) Hantavirus B The scientific name of the Golden Syrian Hamster is . a) Mesocricetus auratus b) Rattus norvegicus c) Mus musculus d) Cavia porcellus A The genus and species of the rhesus monkey is . a) Cercocebus torquatus atys b) Callithrix jacchus c) Saimiri scurieus d) Macaca mulatta D
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The correct name for shoebox-type plastic cages that have a hard plastic lid fitted with a special filter is? a) Microisolator cage b) Biocontainment cage c) Hanging plastic cage d) Mini-isolator cage A A mouse with the genotype AaBBcc has which of the following phenotypes? a) Black b) Brown c) Albino d) Agouti C Which of the following is a direct cost? a) Equipment depreciation b) Physical plant maintenance
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The best tissue preservative to use during routine necropsy is . a) 15% Bouins solution b) 20% Liquid nitrogen c) 10% buffered formalin d) 10% alcohol C The USDA is required to inspect research facilities at least: a) Quarterly b) Semi-annually c) Annually d) Once every two years C The use of in an autoclave is the most common method of sterilization. a) Boiling water
ACCURATE ANSWERS
b) Chemicals c) Gamma radiation d) Steam under pressure D Which of the following genuses is not covered under the Animal Welfare Act? a) Meriones b) Mus c) Chinchilla d) Macaca B USDA reports are available to the public under which of the following documents? a) Public Health Service Policy b) Animal Welfare Act c) Freedom of Information Act d) AAALAC Inspection Reports
