TABLE 1.

Gastrointestinal illnesses associated with NLV and the Eastern oysters (C. virginica) by month (1991 to 1997)^a

Mo of harvest	No. of outbreaks	No. of cases
November	3	218
December	5	692
January	3	77
February–April	3	43
May–October	0	0
Total	14	1,030

^aData compiled from Glatzer (14) and Rippey (21).