Less antibiotic use lets chlamydia bloom | The Australian

"A study online in the journal Sexually Transmitted Diseases analysed records of heterosexual women attending a city sexual health clinic for the first time between 2003 and 2007. The proportion of women testing positive for chlamydia increased on average by 12 per cent a year. About 4 per cent of women were positive in 2003, compared with almost 7 per cent in 2007. An explanation could be that fewer antibiotics are being prescribed that would inadvertently also treat chlamydia infection, the authors say."