Table 1. Characteristics of stool specimens that tested positive for Cryptosporidium infection by rapid cartridge assay at community laboratories, by study site and overall.
| Site | ||||
|---|---|---|---|---|
| Minnesota | New York | Wisconsin | Overall | |
| N (%) | N (%) | N (%) | N (%) | |
| Total number of tests | 95 (24.6) | 119 (30.8) | 172 (44.6) | 386 (100) |
| Test | ||||
| Meridian Immunocard Stat! | 95 (100) | 116 (97.5) | 94 (54.7) | 305 (79.0) |
| Remel Xpect | 0 | 2 (1.7) | 75 (43.6) | 77 (20.0) |
| Other | 0 | 1 (0.8) | 3 (1.7) | 4 (1.0) |
| Age group | ||||
| 0–9 Years | 14 (14.7) | 22 (18.8) | 49 (30.8) | 85 (22.9) |
| 10–19 Years | 9 (9.5) | 19 (16.2) | 33 (20.8) | 61 (16.4) |
| 20–39 Years | 30 (31.6) | 34 (29.1) | 37 (23.3) | 101 (27.2) |
| 40–59 Years | 20 (21.1) | 25 (21.4) | 31 (19.5) | 76 (20.5) |
| ≥60 Years | 22 (23.2) | 17 (14.5) | 9 (5.7) | 48 (12.9) |
| Sex | ||||
| Male | 49 (51.6) | 47 (40.2) | 83 (52.2) | 179 (48.3) |
| Female | 46 (48.4) | 70 (59.8) | 76 (47.8) | 192 (51.8) |
| Season | ||||
| Summer* | 46 (48.4) | 66 (55.9) | 90 (54.9) | 202 (53.6) |
| Fall, Winter, Spring | 49 (51.6) | 52 (44.1) | 74 (45.1) | 175 (46.4) |
| Storage temperature at community laboratory | ||||
| Room temperature | 87 (91.6) | 99 (84.6) | 88 (53.3) | 274 (72.7) |
| Refrigerated (4C) | 8 (8.4) | 17 (14.5) | 77 (46.7) | 102 (27.1) |
| Other | 0 | 1 (0.9) | 0 | 1 (0.3) |
| Preservative used | ||||
| SAF | 20 (21.1) | 71 (59.7) | 51 (29.7) | 142 (36.8) |
| Cary Blair | 30 (31.6) | 0 | 81 (47.1) | 111 (28.8) |
| 10% Formalin | 27 (28.4) | 47 (39.5) | 23 (13.4) | 97 (25.1) |
| Other** | 12 (12.6) | 1 (0.8) | 3 (1.7) | 16 (4.2) |
| None | 6 (6.3) | 0 | 14 (8.1) | 20 (5.2) |
| Time between collection and testing at community laboratory | ||||
| Same Day | 61 (66.3) | 46 (39.7) | 102 (62.2) | 209 (56.2) |
| Next Day | 31 (33.7) | 53 (45.7) | 47 (28.7) | 131 (35.2) |
| 2–3 Days | 0 | 17 (14.7) | 15 (9.2) | 32 (8.6) |
| Confirmatory testing performed at community laboratory | ||||
| Any | 0 | 77 (65.3) | 52 (30.8) | 129 (34.9) |
| None | 83 (100) | 41 (34.8) | 117 (69.2) | 241 (65.1) |
Percentages might not sum to 100 because of rounding. Total counts might not sum to 386 because of missing data.
* Summer was defined as sample receipt at the community laboratory between May 27, 2013 and September 30, 2013.
** “Other” category included Totalfix, Ecofix, and preservatives described as “Other” with no brand specified.