I too am so sorry you have been treated this way. Cases of food poisoning certainly must be reported to the CDC. On our TA, no one could confirm at the time if the GI issues on board were norovirus or food poisoning. The spouse/roommate was not isolated, only the sick person. And from the people we talked to or reported on our Roll Call, their partner was so sick that they voluntarily quarantined. We did not know for sure which GI issue it was until we saw it on the CDC site. I believe it was 120 or so passengers and crew who got sick.
This is troublesome since we already have reports of people coughing, sneezing and obviously sick saying that they won't request a Covid test because they don't want to miss ports. Now we will have people afraid to report possible food poisoning or norovirus symptoms for fear of quarantine.