This seems to beg the question why "creationism" precludes adaptation, what your point even is. You spend a long time in the sun, you get a tan and don't as easily burn. Manual labor leads to muscle growth and more strength. One gains antibodies through a bodily reaction to a foreign presence, hence one becomes disease resistant. Keep in mind there's no need to first become a baboon, before you can resist measles. Actually, to be frank, I can't find any sense in the notion omnipotent God couldn't design products with features, if idiot man can create a programmable remote control.
Perhaps it would be more relevant to ask other questions, if you're sold on evolution. Where is your species change evidence? Where has one creature reproduced to produce a different creature, also noting it's a non-starter to claim the fossil record supports transitional forms? Or perhaps you could explain to everybody how evolution nullifies entropy, what evidence there is of order being created, absent design and energy input, intelligence and work, as oppose to the natural, material order being to do nothing constructive, even drift into decay, on all levels. Tell us about the Big Bang, how, for instance, an explosion was ever used to build a building, as opposed to reducing said building to chaotic rubble, most highly unlikely to reconstruct itself: give us your examples of things you would arrange into order by an explosion, or tell everybody how a stainless watch evolved from iron ore. Perhaps tell us how even a single celled creature requires thousands of simultaneous, complex systems to live, how those systems could have even evolved, or what blood would do, absent the heart. And, please, if you're one of those that really believes a monkey and a typewriter, given enough time, would produce Hamlet or War and Peace, let's just well leave it at, "Never mind. Have a nice day." Whew...
You know, there are a lot of big questions YOU really need to deal with, first, before going after Christians over bacteria.
Matthew 23:24 Ye blind guides, which strain at a gnat, and swallow a camel.