The word "oyster" refers to several different species of saltwater bivalve molluscs that are found in brackish or marine.
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.
That the Vibriosis infections generally occur in warm conditions. Vomiting and diarrhoea are the only major health problems brought on by the infection.