NPHS1 and bacterial urinary tract infection: Rat ascending UTI models were used to compare the pathologic effects exerted by two (cnf 1+clb A+clb Q+) harbouring isolates coded 70β and 6β against non-hemolytic non toxin harbouring isolate, (hly−cnf-1−clb A−clb Q−), coded 67 and hemolytic non toxin harbouring isolate, (hly+cnf-1−clb A−clb Q−), coded 13β.