LGV is not very common in the United States and is most often seen in individuals who have had unprotected receptive anal sex.
LGV can be difficult to diagnose because many of the symptoms are similar to other infections. Most diagnoses are made based on health center observations, but samples can be taken from lesions or sores and tested for the bacteria.
It depends on the lab used by your health care provider, but usually a couple of days to a week.