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Definition of quinsy. plural. quinsies. : an abscess in the tissue around a tonsil usually resulting from bacterial infection and often accompanied by pain and fever.
Causes of a Quinsy. A quinsy is the result of a severe infection of the throat, whether of the tonsils or Weber glands on the soft palate. It is due to bacteria. There are several different species of bacteria that may be involved which can be divided into aerobic and anaerobic bacteria.uinsy Pathophysiology. Tonsillitis is a common infection of tissue in the throat. It is mainly caused by bacteria. When recurrent or chronic tonsillitis is left untreated and in severe cases, it can progress to cellulitis and then lead to pus accumulating in the potential space behind the tonsil.