Should I be worried about any communicable deceases that adults and kids could get from keeping/breeding feeder rats?

i'm just scared and worried - it just dawned on me today that last month i saw a wild rat running on top of my breeding racks - no idea how he got in the room but i made sure this time nothing comes in, nothing comes out. at first i took it for granted then i saw this local news about a fellow that died due to leptospirosis that he got infected from wild rat urine/feces.

it might have contaminated my breeding colony. i'm very worried about Leptospirosis as it might get my whole family sick.

should i be worried? is there anything that i need to watch out for(like symptoms)?