Do I need to recycle after fallow period?

I lost the fish in my 30 gallon tank to gill flukes, and went fishless for a fallow period. I got busy and the tank has been fishless for a little over a year. Haven't done anything with the tank but basic maintenance to maintain it, but somehow I still have a snail alive and well. Looking to add fish and inverts back to the tank, but not sure if the fallow period has killed off the nitrifying bacteria in the tank. Do I need to recycle, or would I be ok to simply slowly increase the bioload?
 
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