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Volume 23, Number 7—July 2017

CME ACTIVITY - Research

Risk Factors for Legionella longbeachae Legionnaires’ Disease, New Zealand

Emma Kenagy1, Patricia C. Priest1Comments to Author , Claire M. Cameron, Debbie Smith, Pippa Scott, Vicki Cho, Peter Mitchell, and David R. Murdoch
Author affiliations: University of Otago, Christchurch, New Zealand (E. Kenagy, P. Scott, V. Cho, D.R. Murdoch); Canterbury District Health Board, Christchurch (E. Kenagy, D. Smith, P. Mitchell); University of Otago, Dunedin, New Zealand (P. Priest, C.M. Cameron)

Main Article

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.

Main Article

1These authors contributed equally to this article.

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