[The "usual" forms of urinary infection in pregnant women]

Urinary infections, normally due to Escherichia coli, are extremely common in pregnant women. Including nonapparent forms, the incidence is 75 per cent. While the apparent forms are not difficult to diagnose, the non-apparent forms have to be looked for, as they may lead to premature births, an essential complication of "gravidic pyelonephritis".