Univ of Arizona Mock Exam B Flashcards
What is the mechanism of action for malignant hyperthermia/porcine stress syndrome? Which breeds are most often affected?
A mutation in the calcium-release channel protein (ryanodine receptor [RYR]), which results in a hypersensitive triggering mechanism of the calcium-release channel in skeletal muscle sarcoplasmic reticulum in response to various stressors (e.g. gas anesthesia, environmental stress).
Stress-susceptible pigs also will overrespond with beta-adrenergic receptor stimulation, lower rates of lactate, alanine, and aspartate conversion to carbon dioxide by the liver, abnormal phosphorus metabolism, and much higher cortisol and thyroxine turnover rate.
It is an autosomal recessive mutation with variable penetrance. Found most often in Landrace, Yorkshire, Duroc, Pietrain, Poland China.
LAM, p 662
What are the clinical and pathologic signs of porcine stress syndrome?
tachycardia, tachypnea, muscle rigidity, hyperthermia, metabolic acidosis, myoglobinemia, hyperkalemia, hyperglycemia, (nonrigid and normothermic forms have been described)
Early signs can include muscle and tail tremors, progressing to dyspnea, blanched and reddened areas on skin, cyanosis.
Pathology includes very rapid development of rigor mortis, pale muscle which are very soft to watery in texture, due to high lactic acid content.
LAM, p 662
- Which artery is ligated to create myocardial infarction in the pig using a mid-sternotomy approach?
Left anterior descending artery
Reference: Swindle MM. 2007. Swine in the Laboratory, 2rd edition. CRC press: Boca Raton. Chapter 9- cardiothoracic and vascular surgery/chronic intravascular catheterization, p.242
Domain 3; Primary Species – Swine
- What anesthetic combination has been occasionally associated with complications and mortality in rats when animals were premedicated with buprenorphine?
Ketamine/Medetomidine
a. Fish RE, Brown MJ, Danneman PJ, Karas AZ, eds. 2008. Anesthesia and Analgesia in Laboratory Animals, 2nd ed. Academic Press, San Diego, CA. Chapter 10 – Anesthesia and Analgesia for Laboratory Rodents, pp. 257-259.
b. Suckow MA, Weisbroth SH, Franklin CL, eds. 2006. The Laboratory Rat, 2nd edition. Elsevier Academic Press: San Diego, CA. Chapter 19 – Anesthesia and Analgesia, p. 656.
Domain 2; Primary Species – Rat (Rattus norvegicus)
- Which rat strain is the appropriate control for the spontaneously hypertensive (SHR) rat?
The inbred SHR was derived from an outbred colony of Wistar Kyoto rat, but the use of the WKY as a normotensive control has been rightfully questioned since it was not fully inbred before being distributed to the U.S. and DNA fingerprinting reveals only about 50% homology between SHR and WKY.
Other normotensive strains are likely more suitable as controls.
References: Suckow MA, Weisbroth SH, Franklin CL, eds. 2006. The Laboratory Rat. 2nd edition. Academic Press: San Diego, CA. Chapter 23 - Spontaneous, Surgically, and Chemically Induced Models of Disease, pp. 717-718.
Domain 3; Primary Species – Rat (Rattus norvegicus)
List rat strains which are spontaneously hypertensive.
- SHR
- GH (Genetically Hypertensive)
- FHH (Fawn Hooded Hypertensive)
- LH (Lyon Hypertensive)
- SBH (Sabra Hypertension-prone)
- MHS (Milan Hypertensive Strain)
References: Suckow MA, Weisbroth SH, Franklin CL, eds. 2006. The Laboratory Rat. 2nd edition. Academic Press: San Diego, CA. Chapter 23 - Spontaneous, Surgically, and Chemically Induced Models of Disease, pp. 717-718.
Domain 3; Primary Species – Rat (Rattus norvegicus)
Describe the genetic inheritance and phenotype of the SHR rat.
- polygenic with at least 3 major genes involved
- Develop SBP of 150 mm Hg by 10 weeks of age
- insulin resistance
- Which of the following is FALSE regarding recirculating systems for aquatic housing?
a. Water is filtered before it returns to housing tanks in recirculating systems
b. Disease outbreaks are easier to contain in recirculating systems than in static systems
c. Recirculating systems have limited water usage compared to flow-though systems
d. Recirculating systems are preferable to static systems for long-term housing of fish
e. Water quality in recirculating systems must be monitored and adjusted as needed
b. Disease outbreaks are easier to contain in recirculating systems than in static systems
1) Fox JG, Anderson LC, Loew FM, Quimby FW, eds. 2002. Laboratory Animal Medicine, 2nd edition. Academic Press: San Diego, CA. Chapter 17 – Biology and Diseases of Amphibians, p. 798.
2) Koerber and Kalishman. 2009. Preparing for a semiannual IACUC inspection of a satellite zebrafish (Danio rerio) facility. JAALAS 48(1):65-75.
Domain 4; Secondary Species – Zebrafish (Danio rerio)
According to the 2007 AVMA Guidelines on Euthanasia, decapitation and pithing of conscious frogs are considered to be which of the following methods of euthanasia?
a. Acceptable
b. Restricted application
c. Unacceptable
d. Conditionally acceptable
d. Conditionally acceptable
1) American Veterinary Medical Association. 2007. AVMA Guidelines on Euthanasia (Formerly Report of the AVMA Panel on Euthanasia), pp. 20, 28 (http://www.avma.org/issues/animal_welfare/euthanasia.pdf).
2) Silverman J, Suckow M, Murthy S. 2007. The IACUC Handbook, 2nd Edition. CRC Press: Boca Raton, FL. Chapter 17 – Euthanasia, p. 308.
Domain 5; Secondary Species – African Clawed Frog (Xenopus spp.)
- What is the vector of Mycoplasma haemomuris (formerly Hemobartonella muris) in rats?
Polyplax spinulosa
Whereas the vector for Mycoplasma coccoides in mice is Polyplax serrata (pictured).
1) Baker DG, ed. 2007. Flynn’s Parasites of Laboratory Animals, 2nd edition. Blackwell Publishing, Iowa, USA. Chapter 11 – Parasites of Rats and Mice, p. 353.
2) Fox JG, Anderson LC, Loew FM, Quimby FW, eds. 2002. Laboratory Animal Medicine, 2nd edition. Academic Press: San Diego, CA. Chapter 4 – Biology and Diseases of Rats, p. 151.
Domain 1; Primary Species – Rat (Rattus norvegicus)
- Which of the following zoonoses is not transmitted by this species?
- a. Salmonella spp
b. Rodentolepis nana (also called Hymenolepis nana)
c. Leptospira spp
d. Giardia spp
e. Balantidum coli*
e. Balantidum coli
Balantidium coli has a worldwide distribution and is
common in domestic swine, which generally are regarded as the main reservoir for human infection. Nonhuman primates also can harbor the organism enterically (Fox and others 1984).
Reference: Institute for laboratory animal research, National research council. 1997. Occupational health and safety in the care and use of laboratory animals, National Academy Press: Washington D.C. p. 65-105
Domain 5; Tertiary Species – Other Rodents
What is the reservoir for Entamoeba histolytica?
Humans serve as the reservoir for Entamoeba histolytica, the causative agent of amebiasis, although nonhuman-primate infections have been recorded (Fox and others 1984). The importance of nonhuman primates as a reservoir host appears to have diminished in recent years.
Occ Health and Safety. p98
What is the defiitive host of Toxoplasma gondii, and what are the zoonotic implications?
Wild and domestic felines are the only definitive hosts of this organism; they are infected by one another or through predation of an intermediate host, and they support all phases of the T. gondii life cycle in their intestinal tract, although numerous other tissues are also involved in feline toxoplasmosis.
Intermediate hosts, including humans, can contract the infection from oocysts, which are present only in materials contaminated by cat feces, -or- by ingesting infectious bradyzoites or cystozoites encysted in the tissues of another intermediate host.
Toxoplasma infection can have severe consequences in pregnant women and immunologically impaired people. In a pregnant woman with a primary infection, rapidly dividing tachyzoites can circulate in the bloodstream and produce a transplacental infection of the fetus. In early pregnancy, the fetal infection can result in death of the fetus or chorioretinitis, brain damage, fever, jaundice, rash, hepatosplenomegaly, and convulsions at birth or shortly thereafter.
Primary infection in immunosuppressed people can be characterized by maculopapular rash, pneumonia, skeletal myopathy, myocarditis, brain involvement, and death.
What laboratory conditions are required for naturally or experiemntally infected animals with Shigella?
ABSL-2
Occ Health and Safety, p 94
What laboratory conditions are recommended for activities using natural or experimental infection of Salmonella?
ABSL-2
What laboratory conditions are recommended for natural or experimental infections with Campylobacter?
ABSL-2
What laboratory conditions are recommended for animal studies involving Brucella canis?
ABSL-3
Also, for B. abortus, B. melitensis, B. suis.
What laboratory conditions are recommended for animal studies involving Yersinia pestis?
ABSL-2
What laboratory conditions are recommended for Streptobacillus moniliformis?
Training of proper animal-handling techniques is critical.
What laboratory conditions are recommended for animal studies involving Coxiella burnetii?
C. burnetii is a select agent.
BSL-2 practices and facilities are recommended for nonpropagative laboratory procedures, including serological examinations and staining of impression smears.
BSL-3 practices and facilities are recommended for activities involving the inoculation, incubation, and harvesting of embryonated eggs or cell cultures, the necropsy of infected animals and the manipulation of infected tissues. Experimentally infected animals should be maintained under ABSL-3 because infected rodents may shed the organisms in urine or feces.
A specific plaque-purified clonal isolate of an avirulent (Phase II) strain (Nine Mile)** may be safely handled under **BSL-2 conditions.
Which of the following species is commonly used as a model of respiratory syncytial virus and human adenoviral pneumonia?
- a. Meriones unguiculatus
b. Oryzomys palustris
c. Peromyscus leucopus
d. Sigmodon hispidus
e. Zygodontomys brevicauda*
d. Sigmodon hispidus
Meriones unguiculatus (Mongolian gerbil) - Wide variety of parasitic research such as Giardia, Babesia, Strongyloides, Haemonchus, Trichostrongylus, Capillaria, Wucheria, Onchocerca, Loa loa, Echniococcus, Taenia, Schistosoma, Paragonimus. Only viral disease model is Rift Valley Fever virus.
Oryzomys palustris (Rice rat) - No viral disease research. Spontaneous periodontal disease, drug research, vitamin E, photoperiod and pineal gland melatonin on reproduction.
Peromyscus leucopus (White-footed deer mice) - Genetics, physiology, aging, cataracts, behavior. Susceptible to variety of zoonoses: sin nombre, other hantaviruses, vesicular stomatitis virus, Lyme, ehrlichia, babesia, trypanosoma, tularemia.
Zygodontomys brevicauda (Cane mice) - arboviruses like Yellow Fever, rodent paramyxoviruses like Nariva virus, VEE, rhabdovirus like Cocal virus, natural host of Guanarito virus which causes Venezuelan Hemorrhagic Fever (VHF).
Reference: Fox JG, Anderson LC, Loew FM, Quimby FW, eds. 2002. Laboratory Animal Medicine, 2nd edition. Academic Press: San Diego, CA. Chapter 7 – Biology and Diseases of Other Rodents, pp. 266, 268-269, 270, 275-276
Domain 3; Tertiary Species – Other Rodents
Which of the following is TRUE with respect to the feeding of zebrafish?
a. Commercial dry diets are not readily consumed by larval stages
b. Ciliated protozoans (such as Paramecium) are of no use for larval stages
c. Freshly hatched nauplii of brine shrimp are of no use for larval stages
d. Commercial flakes or pellets do not normally offer a complete and balanced diet
a. Commercial dry diets are not readily consumed by larval stages
1) Fox JG, Anderson LC, Loew FM, Quimby FW, eds. 2002. Laboratory Animal Medicine, 2nd edition. Academic Press: San Diego, CA. Chapter 19 – Biology and Management of the Zebrafish, p. 874.
2) Ostrander G, ed. 2000. The Laboratory Fish. Academic Press: San Diego, CA. Chapter 3 – Diet, pp. 68-69.
Domain 4; Secondary Species – Zebrafish (Danio rerio)
At what age can zebrafish be transitioned to commercial dry flake food?
Young fish up to 10-14 days should consume a diet exclusively of Paramecium and/or brine shrimp, and can be transitioned to dry feed at 10-21 days of age.
1) Fox JG, Anderson LC, Loew FM, Quimby FW, eds. 2002. Laboratory Animal Medicine, 2nd edition. Academic Press: San Diego, CA. Chapter 19 – Biology and Management of the Zebrafish, p. 874.
2) Ostrander G, ed. 2000. The Laboratory Fish. Academic Press: San Diego, CA. Chapter 3 – Diet, pp. 68-69.
Domain 4; Secondary Species – Zebrafish (Danio rerio)
How much should fish be fed at each feeding? What is the rationale for this guideline?
Fish should not be fed more than they can consume in 3-5 minutes. Uneaten food decays and is a major source of nitrogenous waste in the water system.
LAM, p 874
According to the Animal Welfare Act and its regulations, all of the following statements apply to animal housing facility inspections EXCEPT?
a. The IACUC must conduct inspections of facilities at least once every 6 months
b. No IACUC member can be excluded if they wish to participate
c. Ad hoc consultants may be used for facility inspections
d. Animal study areas where USDA-covered species are held for more than 12 hours must be inspected
e. Subcommittees assigned to specific facilities must contain at least one IACUC member
e. Subcommittees assigned to specific facilities must contain at least one IACUC member is incorrect
Subcommittees must contain at least two IACUC members.
1) Applied Research Ethics National Association (ARENA) and Office of Laboratory Animal Welfare (OLAW). 2002. Institutional Animal Care and Use Committee Guidebook. 2nd Edition. OLAW: Bethesda, MD. Section B.1 Program and Facility Review, pp. 37-39.
2) Animal Welfare Regulations, CFR Title 9, Chapter 1, Subchapter A, Part 2 – Regulations, Subpart C – Research Facilities, §2.31 Institutional Animal Care and Use Committee (IACUC), (11-05 Edition, p. 33)
Domain 5
- The fecal output scoring system pictured below was used to evaluate what in rabbits?
Pain assessment
1) Fish, R.E., Brown, M. J., Danneman, P.J and Karas, A.Z, eds. 2008 Anesthesia and Analgesia in Laboratory Animals, 2nd ed. Academic Press, San Diego, CA. Ch 11 – Anesthesia and Analgesia in Rabbits, pp. 324.
2) Weaver et al. 2010. A model for clinical evaluation of perioperative analgesia in rabbits JAALAS 49(6):845- 851.
Domain 2; Primary Species - Rabbit (Oryctolagus cuniculus)
Interstitial cell tumors are most commonly found in aged rats in which of the following strains?
F-344
Interstitial cell tumors occur in about 80% of aged F-344 rats. They are of Leydig cell origin.
LAM, p 155
Pictured is a rat brain. What two strains are most likely? Sex differences?
Pituitary adenoma
Sprague-Dawley (75% incidence) or F-344 (20% incidence)
Females more likely (67 vs 83% incidence in SD; 16 vs 20% in F-344)
LAM, p 154-55
Which of the following terms refers to the condition when pain is induced by a non-noxious stimulus?
a. Hyperalgesia
b. Allodynia
c. Subanalgesia
d. Hypersensitivity
e. Sensitization
b. Allodynia
Hyperalgesia - an exaggerated response to a stimulus that woiuld normally be painful
Hypersensitivity - reduced threshold to noxious stimuli
Summation - increasing pain with repeated stimuli of the intensity
1) Curtin CI et al. 2009. Evaluation of buprenorphine in a postoperative pain model in rats. Comp Med 59(1):60-71.
2) Fish RE, Brown MJ, Danneman PJ, Karas AZ, eds. 2008. Anesthesia and Analgesia in Laboratory Animals, 2nd ed. Academic Press, San Diego, CA. Chapter 1 – Anatomy, Physiology, and Effects of Pain, pp. 4-5.
Domain 2