Whoa.
Been there, with the mice infestation. I have lived at an apartment where the problem was really severe, I mean to the point where I could hear them gnawing their way through the wall at night. I would set out glue traps & in the morning I would find 3 - 5 mice stuck
on each one. Finally, after the landlord refused to do anything about it (his response:"I wonder where they are coming from??"

) I stopped paying rent & got the hell out of there.
Here are some facts about mice:
Some Facts About Mouse Reproduction
- Scientific name: Mus musculus
- Weight: 20-60 g (varies according to type)
- Life expectancy: 1-3 years (varies according to background, "strain")
- Sexually mature: 4-7 weeks (both males and females)
- Cycle of heats: 4-5 days, continuing all year round
- Gestation period: 19-21 days
- Weight at birth: 1-1,5 g
- Size of litter: 4-14 (even more), average 12 babies
- Pigment starts to show: from 3rd day forward
- First coat has developed: at 10 days
- Eyes open: 12-13 days
- "Flea age": 10 days to 3,5 weeks, can be less.
- Nursing period: approximately 3-3,5 weeks
- Weaning age: males 3,5 weeks, females may be weaned at 4 weeks
- Separate to single sex groups: 3,5 weeks
- Ready to leave for new homes: 1 month of age
- Proper age for first mating of female: 3-4 months
- Proper maximum age for first mating of female: 5 months
- Resting period between matings: At least 2 weeks, preferably over 1 month between weaning of one litter and mating for another.
- Litters for one female: 3 is generally enough!
- Leave the female out of breeding: at 1 year of age.
http://www.hiiret.fi/eng/breeding/essentials1.html
So, if you see one mouse, in all likelihood, you are not seeing a dozen or so more. If it continues beyond a month, you are now dealing with a severe infestation.
Mice carry the Hantavirus.
http://www.cdc.gov/ncidod/diseases/hant ... ansmit.htm
If I saw a mouse in a restaurant, I'd be out of there faster than lightning.
If I saw a mouse in my house, and it was my house, not a rental, I'd move heaven & earth to eradicate the vermin before it became an infestation.
I can't believe I ate the whole thing!