Australia has approved the first vaccine to protect its shrinking koala population against chlamydia, a disease that accounts for as many as half of deaths in the wild among the country’s iconic ...

Sexually transmitted infections, or STIs, include both sexually transmitted diseases, known as STDs, and the many infections that don’t progress to disease. STIs are caused by more than 30 different ...

The genus chlamydia includes several species that can cause sexually transmitted infections (STIs), pneumonia and other respiratory infections, eye infections, and more illnesses. When you hear the ...

Chlamydia is often called a “silent infection” because many people don’t know they have it. It’s caused by a type of bacteria called Chlamydia trachomatis and can affect both men and women. While it’s ...

The bacteria that cause chlamydia might be trickier than we knew. In a new study this week, scientists have found evidence that these bacteria can hide in our intestines. The findings might explain ...

Erie County's troublesome wave of syphilis appears to have crested, as cases of the sexually transmitted disease declined for the second straight year. The county's number of gonorrhea cases also ...