Rats & Mice (LS) Flashcards
Males are often the most aggressive sex in rodents. What is the exception?
Female hamsters
Which teeth are open rooted and grow continously in rats & mice?
TQ!!!
Incisors
What is a normal color of rodent teeth?
Orange
Which teeth should you NOT clip in a rat/mouse?
Lower incisors
(should be longer than upper incisors)
What is the most common tumor of rats & mice?
Do they frequently metastasize?
Mammary tumors
No!
Do rodents vomit?
Should you fast them before SX?
TQ
NO & NO
What is the Whitten Effect?
- when pheromones in a dominant male mouse’s urine cause a large group of female mice (housed together) to synchronize their estrus cycles
What is the Bruce Effect?
refers to the tendency for female rodents to terminate their pregnancies following exposure to the scent of an unfamiliar male
Are the inguinal rings in a male rat/mouse closed or open?
TQ
Open
(closed castration required)
What is “barbering”?
Who’s doing it?
How do you TX?
- dominant mouse nibbles off fur & whiskers of cage mates (skin will be normal)
- Mouse that has all its fur
- Environment enrichment or remove dominant mouse
What a good Antibiotic for mice & rats?
Enrofloxacin
(Baytril)
What is the most common tumor found in mice?
Prognosis?
- Adenocarcinoma
- poor→ will always come back even if remove
TX for Overgrown Incisors?
- Trim teeth every 2-3 mo.
- Sedate
- Use a dremel or dental drill
C.S of Fur Mites in Mice/Rats
- thin, greasy hair coat
- pruritis
- self-inflicted trauma
How are fur mites often introduced?
- new animals
- can be subclinical for wks - mos.
Is a skin scrap required to DX fur mites?
NO!!!
TX for Fur mites?
- Ivermectin
- Trim hind nails
What causes Mouse Hepatitis Virus?
Which age group is most effected?
TQ
Coronavirus
(Parvo of Mice)
Neonates
Lesion of Mouse Hepatitis Virus
BIG BIG liver
Rotavirus affects what age group of mice?
How’s it different from Coronavirus?
- Neonates
- Soiled haircoats due to diarrhea (covered in mustard)
- Will continue to eat
What virus is 100% fatal in mice/rat pups?
Sendai Virus
C.S. of Mycoplasma pulmonis in mice/rats?
(Peterson saw rats > mice)
- Dyspnea
- Pneumonia
- Rhinitis
- Otitis media
- Head tilt
Will Antibiotics eliminate Mycoplasma pulmonis infections?
no
How can you TX Dermatophytosis in mice/rats?
2 causes?
- Topical miconazole
- Griseofulvin orally (+ corn oil)
- T. metagrophytes
- M. canis
What is the most common tumor found in rats?
Prognosis?
Fibroadenoma
good →frequently benign
reoccurence is common once excise
What can help prevent or limit the severity of Chronic Progressive Nephropathy in Rats?
Who gets it?
- Calorie & protein restriction
- > 1 yr old rats
- Males > females
What causes Sialodacryoadenitis Virus in rats?
Coronavirus
C.S. of Sialodacryoadenitis Virus
TX?
- Red ocular & nasal discharge → inflammation of Harderian gland
- Go off feed
- self-limiting (30 days)
- May require critical care for nutrition purposes
4 agents that make up Respiratory Dz in Rats?
- Mycoplamsa pulmonis
- Strep. pneumoniae
- Coryne. kutscheri
- Cilia-associated Respiratory Bacillus
