Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
If no treatment is recommended, routine repeat cultures are usually unnecessary.
Bacteria may remain present or return without causing symptoms, and repeated testing can lead to avoidable antibiotic use.
During pregnancy, attend prenatal follow-up and complete any prescribed treatment exactly as directed.
Whether a repeat culture is needed after treatment depends on the individual situation and local practice; evidence about repeat screening is limited.
The article also says
Contact a healthcare professional if new urinary symptoms, fever, chills, back or side pain, or unexplained worsening illness develops.
A new evaluation is needed because symptoms change the clinical situation.
If treatment was given before a urologic procedure, follow the procedural team’s instructions.
Report fever, worsening pain, difficulty urinating, or feeling seriously unwell after the procedure.
People with recurrent positive cultures may wish to ask whether testing is being done for a specific reason.
In the absence of symptoms, avoiding repeated urine cultures can be an important part of safe antibiotic use.
Every sign above is quoted from the sofidex article on Asymptomatic bacteriuria. If you are not sure, err upward — it is always reasonable to be checked.