Testing for chlamydia is only available very recently, so it's not possible to say with certainty when the first US case of chlamydia occurred.
2007
Chlamydia is the #1 bacterial STI in the US.
The southeastern part of the US has the highest rate of chlamydia.
Yes, in the case of chlamydia or gonorrhea
Although it has not been confirmed that it was chlamydia there are reports of a chlamydia like bacteria infecting the eyes of ancient Chinese and egyptians. There was an outbreak in the early 1920's by bacteria from the chlamydiae phylum. The name Chlamydia first appeared in writing in 1945 and was validated as a genus of the Chlamydiae phylum in 1966. Chlamydia is a bacteria. When we talk about Chlamydia in STIs, we refer to Chlamydia trachomatis, one of three bacterial species in the genus Chlamydia, family Chlamydiaceae, class Chlamydiae, phylum Chlamydiae, domain Bacteria. It was first discovered in humans in 1907. Chlamydia type bacteria have been found in the walls of some plants, and it is thought that there was a species crossover some time, historically. So, it has been spread throughout humans throughout the whole of the last century.
Among the largest metropolitan areas in the US, Memphis has, by far, the highest rates of chlamydia.
In the US, typically azithromycin or doxycycline, same as for women.
Chlamydia is not a disease that has stages. Syphilis is the STD with distinct stages.
You should worry about catching chlamydia if you are having sex. Over 2.25 million people in the US are infected with the bacteria. It is the #1 bacterial STD infection in the US.
It is not possible to know where chlamydia was first found. I know of no particular reason to think it originated in the Ukraine.
Yes, a female or a male partner may be first to have chlamydia. Although women have more reported cases of chlamydia, this fact is likely due to increased screening in women. Other studies screening men and women equally show that both genders are equally likely to have chlamydia.
You'll need to get that treated first.