Reported cases of gonorrhea rose 26 percent in the first six months of 2010 compared with the same period last year, Philadelphia's Department of Public Health said. It is possible that the higher numbers reflect more testing. Still, after several years of modest declines through 2009, the increase is a public health concern. Most gonorrhea infections in women are without symptoms. Thomas Fekete, chief of infectious diseases at Temple's School of Medicine, said that the estimated 10 percent of men and significantly larger proportion of women who do not know they have the infection — and therefore do not seek treatment — can contribute to the disease's spread.