When Melanie Cheng saw a dead mouse in the staff room of Graham Bruce Elementary school last year, the mother of three was disgusted — and curious about the extent of rodent activity in other Vancouver schools.

Thanks to documents obtained by CBC News, Cheng — the chair of the Vancouver District Parent Advisory Council — now has the details of the more than 300 complaints about mice and rats logged last year by staff at dozens of schools district-wide.

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From repeated complaints of a "dead rodent smell" in the office at Champlain Heights Elementary last fall to a "rat and mouse infestat

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