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23 Cards in this Set
- Front
- Back
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what is polyestrus
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frequent estrus cycle (every 4-5 days)
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what is the genus and species of the norway rat and the black rat
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norway rat: norvegicus rattus
black rat: rattus rattus |
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what is the vaginal plug and what is its purpose
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coagulated semen after copulation-falls out in the form of a plug when mating has occured
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name 2 albino rats used in the lab
what is the name of the hooded rat? |
sprague dawley and wistar
long evans-hooded rat |
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young rats and mice are sexed by:
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observing ano-genital distance
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what is the average life span
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2-3 and half years
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why are rats often used in toxicology studies
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lack of gag reflex and inability to vomit
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breeding age
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10-12 weeks
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estrus cycle
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every 4-5 days for 12 hours
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gestation length
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21-23 days
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litter size
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7-14
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weaning age
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18-21 days
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what gland produces porphyrin and what is it? what is it a sign of??
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harderian gland
lubricates the eye, red colored substance stress can cause large amounts of porphyrin to be produced |
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rats will eat ____g of food per day that should contain _____ % fat
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15-20 g
4% |
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sendai virus
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parainfluenza virus
-highly contagious -rough coat, dsypnea, anorexia |
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SDAV and RCV
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produce infections with high morbidity and low mortality
-spread rapidly -sneezing, photophobia, swelling of then neck, nasal and ocular discharge that is a reddish brown color |
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kilham rat virus
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shed in the urine and feces, milk and nasal discharge
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murine respiratory mycoplamosis
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snuffling, chattering, weight loss, lethargy, dyspnea and rough hair coat
-if bacteria enters middle ear, can cause head tilt -antibiotics supress infection but will not eliminate the disease - |
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corynebacteria kutcher
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causes pseudotuberculosis
-clinical signs appear during stress -dyspnea, ocular and nasal discharge, weigh loss, hunched posture and anorexia |
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what is the scientific name for the pin worm? what are some clinical signs?
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syphacia muris
-soft stool, enteritis and perianal irritation |
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Give the common name for Polyplax spinulosa. Why is it a concern among rats and how would you diagnose and treat an infestation.
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spined rat louse
-transmits infectious agents to the rat -diagnose by skin scrapings and treat by placing ivermectin in the water or dichlorvos strips in cage |
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What area of the body does the rickettsial disease Hemobartonella muris target?
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red blood cells
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what other areas of research are rats used in
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cancer studies
-cardiovascular and endocrine studies |
