i had TB as a child, and i always get an old scar showing on my xrays. During my spousal application medicals, i was asked to provide further test information saying it was treated, and to prove its inactive(latent tb). CIC requested an afb smear and culture test(basically a test of your sputum for any sign of active TB) smear is instant, and culture takes 6-8 weeks to produce result. Both came out negative. CIC also requested a second xray after 3 months of my initial one. I took that and it showed my scar has not changed(good thing as it shows your TB is inactive) I got issued a TB clearance from my state Health department which was included in my doctors report a long with my sputum results, and CIC cleared me
. My COPR has medical surveillance which is basically a medical assessment by Canadian doctor to completely rule out TB thats active. The border official will give you instructions on how to complete the surveillance. (please ensure you complete it as it will affect your citizenship application). The entire procedure is covered by the provincial insurance. They give you 6 months to do it, so you will have gotten your provincial insurance depending on which province you are landing.
So NO latent TB will not hinder your application, Just make sure to complete the tests they ask for(i was given 90 days to complete further medical tests)..good luck and all the best