I did find this interesting article [1] that might fit your description. It gives some history around ice cream poisonings, Victor Vaughan, and the advancement

I did find this interesting article [1] that might fit your description. It gives some history around ice cream poisonings, Victor Vaughan, and the advancement of bacteriology: For instance, prior to the development of the ice cream cone, street vendors often served their ice cream in reusable glass dishes. Often made of thick glass to create the appearance that they contained more ice cream than they actually did, these “penny licks” were simply wiped out and reused rather than being washed.26 Later in the century the more hygienic “hokey-pokey”—an individual serving of ice cream wrapped in paper—became popular.27 Besides avoiding the unsanitary “penny lick,” the hokey-pokey also discouraged the notorious practice of refreezing unsold melted ice cream and serving it to unsuspecting customers. As melted ice cream provided an ideal environment for the reproduction of bacteria, this noxious product surely caused many food poisoning cases. [1] https://www.jstor.org/stable/26305867 https://www.jstor.org/stable/26305867