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23 Cards in this Set
- Front
- Back
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what is the bruce affect?
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when female is housed with male 24 hours after mating, implantation is prevented, and estrus will return in 4-5 days
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what is the whitten effect
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introduction of a male into a group of females will synchronize their estrus cycles
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stock
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outbred population of mice
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strain
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inbred population of mice
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megacecum
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infection of the cecum
-enlarged and filled with mucus |
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8. What should the environmental parameters be set at in the macroenvironment of the mouse? Temperature, light cycle, ventilation, humidity, and noise.
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temp: 22-26 degrees
humidity: 45-60 % noise: quiet is better enrichment is necessary |
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9. Explain post-partum estrus in mice. Why is the gestation length longer if a mouse is bred during the post-partum estrus?
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occurs 24 hours after birth
not very successful lactation delays implantation |
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3 main strains of inbred mice
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BALB/c
CBA DBA |
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3 main stocks of outbread mice
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black swiss
icr swiss webster |
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13. Behaviorally and physiologically, how do mice regulate their body temperature?
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heat loss is acheived by decreasing the metabolic rate and increasing blood flow to the ears and tail
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breeding age
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6-7 weeks
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estrus cycle
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every 4-5 days
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gestation
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19-21 days
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litter size
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6-12 pups
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weaning age
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18-21 days
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16. Pups use ____________ to summon the mother.
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ultrasonic waves
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EDIM
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epizootic diarrhea of infant mice
-yellow, pasty feces -highly infectious and spread orally - |
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LIVM
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lethal intestinal virus of infant mice
-highly contagious -dirrhea, inappetance, dehydration, weight loss, lethargy -to eliminate disease, infants should be derived from hysterectomy |
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hantavirus
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zoonotic
-causes fever, sore muscles, respiratory distress |
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Pseudomonas Aeruginosa
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bacteria that inhabits the nasal cavity, throat and lower digestive tract
-zoonotic -septicemia, hunched posture, rough hair coat, emaciation -usually contracted from water -hyperchlorination in the water will help eliminate it |
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18. There are 3 ectoparasites that can cause dermatitis due to scratching. Name the three parasites and how you would test and treat for them.
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polyplax serrata
myobia musculi mycoptes musculinus cause dermatitis, alopecia, pruritis, and trauma -skin scraping or cellophane test -treated with ivermectin or dichlorvos strips |
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life cycle of the pinworm
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eggs laid near anal opening
-larvae develop into adults within the cecum and colon within 15 days -eggs passed through feces and inhaled from the air |
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20. How do you diagnose and treat a possible tapeworm infestation? Why should we be concerned about this parasite?
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zoonotic
-diagnois made by detection cestode eggs through fecal float - |
