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. 2007 Sep 21;73(22):7388–7391. doi: 10.1128/AEM.00552-07

TABLE 2.

Description of natural samples analyzed and outcome of analysis of foodstuff samples for the presence of Cryptosporidium oocysts and Giardia cysts

Sample no. Product Amt analyzed % Recovery with ColorSeed
Natural contamination (no. of cysts per 50 g of sample)
Slide backgrounda
Cryptosporidium Giardia Cryptosporidium Giardia
1 Romaine hearts 150 g 13 38 None None H
2 Mixed chilies All contents of packet 20 21 None None L
3 Continental four-leaf salad 100 g 26 38 None None H
4 Crispy green salad 100 g 25 39 None None H
5 Organic gem lettuce 1 Head 3 31 None None H
6 Lettuce sticks 5 Sticks 25 23 None None M
7 Sliced, peeled carrots All contents of packet 46 34 None None M
8 Fusion salad 100 g 15 44 None None H
9 Mange-touts 100 g 18 20 None None M
10 Cantonese vegetable stir-fry 100 g 44 20 None None M
11 Organic herb salad 50 g 70 57 None None H
12 Curly parsley 30 g 59 43 None None L
13 Spring onions 3 Pieces 46 38 None None H
14 Organic iceberg lettuce 70 g 49 65 None None H
15 Sliced, peeled carrots 50 g 26 28 None None H
16 Birds Eye chillies 14 g 16 5 None None M
17 Organic watercress, spinach, and rocket salad 50 g 62 53 None 1 M
18 Organic bay leaf salad 50 g 60 49 None None H
19 Pak choi 1 Piece 57 44 None None M
20 Baby sweet corn and asparagus 100 g 45 41 None None M
a

Background contamination of slides was rated as high (H), medium (M), or low (L).