Occurrence and consequences of occupational exposure to biological material at a brazilian hospital - Marziale, Maria Helena Palucci; Rocha, Fernanda Ludmilla Rossi; Cenzi, Camila; Cassiolato, Flávio; Felli, Vanda Elisa Andres; Anabuki, Marina; Silva, Everaldo; Ximenes, Rosemiro; Silva, Regina da (International Congress on Occupational Health, 2012)