Well, first off, call you're doctor... or the extension office, or both, cause none of us are doctors, (or a few may be, but even they arent going to hand out medical advice) but this question has been discussed once lately here >
https://www.backyardchickens.com/forum/viewtopic.php?id=125967 and most opinions seem to be that:
A) To the knowledge of most of us, not much real problem disease wise, the two already mentioned are quite rare, and I think Histoplasmosis is more from the most dusty/dirty and extended exposure types of tasks.
A) Chicks are rather dusty, and it's probably best to wear a dust mask around them, not cause of HP, just cause they're dusty.
B) Lifting shovels of poo while cleaning a coop, or being exposed to any amonia fumes from a very dirty coop are all best to be avoided.
C) Don't be hauling heavy buckets of water or 50# sacks of feed around.
I've
never known a single person who ever got sick FROM their chickens. I've heard kids say they were sick OF cleaning the coop! I probably tried that when I was 14 or so myself! I still had to muck it out.
Women have been caring for the chicks and chickens on farms for hundreds of years...
Use common sense.