Leptospirosis in stray dogs found in university campus: serological evaluation and urine direct exam / <br> Leptospirose em cães errantes encontrados em campus universitário: avali... oleh Julio Cesar de Freitas, Ernest Eckehardt Muller, Lucimara Aparecida Alves, Julieta Catarina Burke, Daniela Dib Gonçalves, Giovana Giuffrida Rodrigues, Aline Benitez