In a word, yes.
Diagnostic testing for meningitis is thru cerebrospinal fluid, not blood, but it’s carried in the blood. I’m not familiar with the treatment & all the testing of donated blood. A handful of infectious diseases are screened for in every donation (meningitis not included). I know some blood is cultured, but I don’t know if it’s routine for every donation.
I think the Red Cross updates screening for infectious diseases as outbreaks warrant it.
The reason I asked is that all Talk shows on Fox and CNN, with Medical advice segments, have insisted that the only way to get this fungal meningitis is thru the injection. They never mentioned blood donors. This is not an issue for me personally, just curiosity.