TABLE 1.

Number of studies extracted from the 51 papers and reports on the contamination of fresh and minimally processed vegetables with L. monocytogenes per type of product with total, minimum, and maximum numbers of samples analyzed

Product	No. of studies			No. of samplesd			References
	Total	Prevalence only	Prevalence and concn	Total	Min	Max
Minimally processed vegetablesa,c	48	42	6	8,511	1	2,934	1, 3-5, 9, 16, 17, 19, 26, 29, 39, 42, 46-50, 55, 60, 62, 63, 69
Minimally processed leafy salad vegetablesb,c	15	10	5	7,511	3	3,849	4, 16, 19, 22, 25, 42, 46, 62, 64, 69, 70, 72
Sprouts and germinated seed, mung bean, alfalfa, and bean sprouts	12	10	2	785	6	276	3, 16, 19, 51, 71
Unprocessed vegetablesa	67	66	1	3,934	1	425	1, 3, 8, 9, 13, 14, 18, 20, 21, 24, 26, 27, 31, 36, 38, 39, 42, 47-49, 51, 56, 57, 59, 66, 67, 69, 71, 72, 74, 78, 81
Unprocessed leafy salad vegetablesb	23	22	1	4,337	10	2,966	9, 13, 21, 25, 27, 32, 38, 41, 42, 45, 57, 67, 69, 71, 78
Total	165	150	15	25,078	1	3,849

^aVegetables included beets, carrots, cabbage, cauliflower, celery, cucumber, roots, bulbs, tomato, spinach, broccoli, leek, various herbs, and mixed vegetables.

^bVegetables included lettuce, rocket, lamb's lettuce, and endive.

^cVegetables were trimmed, cut or shredded and washed.

^dMin, minimum; max, maximum.