The word "oyster" refers to several different species of saltwater bivalve molluscs that are found in brackish or marine.

After eating an oyster that is "one in a billion," a gentleman died suddenly.

In Fort Lauderdale, Florida, the deceased man was eating at a restaurant 

The person became severely ill from such a Vibrio-related bacterial infection.

This was the first time a client at the restaurant had experienced such a sad incident.

The oyster that was terrible was "the one in a billion" oyster that the person who died "had." 

The deceased man had worked previously at the restaurant renowned because of its garlic crabs.

Over the period of sixty years, the restaurant served a "several  billion oysters," no one has had the  illness.

That the  Vibriosis infections generally occur in warm conditions. Vomiting and diarrhoea are the only major health problems brought on by the infection.