<human>: Give me the gist of the text in a nutshell

In the last week or so I've seen one or two fleas randomly in my apartment, which concerned me, but I have no pets.  About half an hour ago I walked out of my front door to get the mail (I usually enter and exit through another door).  This front door leads into a common entrance area that is shared with my nearest neighbor.  When I came back in from grabbing the mail, there were quite a few fleas crawling up my legs from my socks.

* My first question is: is there any way to keep them from getting into my region of the house?  There's really only a crack under my door I can see them getting in, most of the rest of the apartment space seems sealed off.
* My second question is: if there are a few in my house now, can I keep them from infesting my furniture or at least check to see if I have many in my space?
* Final question: I'm going to call the rental company as soon as possible (sadly it is a Saturday...).  Should I try to talk with the other tenants before calling just so I don't seem like a dick or something?  The offending neighbor who I know owns a dog is currently moving out or is moved out (I'm really not sure because I hardly know my neighbors).
<bot>: I'm pretty sure my next door neighbor who just moved out infested our split-house apartment with fleas.  I'm going to call the rental company, but what can I do to avoid the Fleapocalypse?