Volume 23, Number 7—July 2017
CME ACTIVITY - Research
Risk Factors for Legionella longbeachae Legionnaires’ Disease, New Zealand
Emma Kenagy1, Patricia C. Priest1
, Claire M. Cameron, Debbie Smith, Pippa Scott, Vicki Cho, Peter Mitchell, and David R. Murdoch
, Claire M. Cameron, Debbie Smith, Pippa Scott, Vicki Cho, Peter Mitchell, and David R. Murdoch
Table 4
Univariate analyses of the associations between gardening behaviors and Legionella longbeachae Legionnaires’ disease, New Zealand, October 1–March 31, 2013–2014 and 2014–2015*
| Activities performed around the time of gardening | Case-patients, no. (%) | Controls, no. (%) | OR (95% CI) |
|---|---|---|---|
| Hand to face after using compost and before washing hands | |||
| Ate or drank | 7 (23) | 13 (8) | 4.1 (1.4–11.8) |
| Touched face | 12 (39) | 31 (18) | 3.6 (1.5–8.6) |
| Smoked | 2 (7) | 5 (3) | 2.2 (0.39–12.0) |
| Any opportunity for getting hands near face (smoking, eating or drinking, or touching face) before washing hands |
16 (52) |
36 (21) |
4.8 (2.1–11.1) |
| Possible compost aerosolization | |||
| Opened compost | 21 (68) | 55 (32) | 5.2 (2.2–12.1) |
| Used compost indoors | 7 (23) | 9 (5) | 6.6 (2.1–20.7) |
| Tipped or troweled compost | 24 (77) | 60 (35) | 8.3 (3.2–21.5) |
| Moved compost with hands | 15 (48) | 52 (30) | 2.6 (1.1–5.8) |
| Purchased compost or moved potting mix around (with hands or by tipping/troweling) |
26 (84) |
70 (41) |
9.9 (3.4–28.3) |
| Possible protective factors† | |||
| Wore a mask while using compost | 5 (19) | 12 (14) | 1.5 (0.46–4.8) |
| Wore gloves while handling compost | 17 (65) | 50 (60) | 1.2 (0.49–3.1) |
| Wet compost down before use | 4 (13) | 18 (11) | 1.6 (0.48–5.4) |
*OR, odds ratio.
†Among only those who had used compost in previous 3 weeks.
1These authors contributed equally to this article.
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