Interaction of Afimbrial E. Coli Trated with Sub-Mic Doses of Mecillinam and Aztreonam with Peritoneal Macrophages [Interaccao, In Vivo, De Celulas Afimbriais De Estirpes Uropatogenicas De E. Coli Tratadas Com Doses Sub-Cim De Mecilinamo E Aztreonamo E Os Macrofagos Peritoneais De Ratinho Nao Imune]