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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 3

Univariate analyses of the associations between garden type, garden exposures, or pets and Legionella longbeachae Legionnaires’ disease, New Zealand, October 1–March 31, 2013–2014 and 2014–2015*

Environmental factors Case-patients, no. (%) Controls, no. (%) OR (95% CI)
Garden type
Outdoor garden on property 31 (100) 168 (98)
Enclosed garden on property† 11 (36) 29 (17) 3.0 (1.3–7.1)
Hanging pots or baskets on property
10 (32)
53 (31)
0.95 (0.41–2.2)
Garden exposures
Near dripping, hanging pots or baskets 4 (13) 37 (22) 0.55 (0.18–1.7)
Gardened in the past 3 weeks 29 (94) 151 (88) 1.9 (0.42–8.7)
Spent any time gardening outdoors 28 (90) 150 (87) 1.3 (0.36–4.7)
Spent any time gardening indoors‡ 10 (32) 54 (31) 1.0 (0.45–2.4)
Used purchased compost 26 (84) 84 (49) 6.2 (2.2–17.3)
Used homemade compost§
7 (23)
40 (22)
1.0 (0.40–2.6)
Pets
Own dog(s) 7 (23) 40 (23) 0.97 (0.36–2.6)
Own cat(s) 19 (61) 63 (37) 3.0 (1.3–6.8)
Own bird(s) 4 (13) 12 (7) 1.9 (0.55–6.5)

*OR, odds ratio.
†Glasshouse, tunnel house, hydroponics, or conservatory.
‡Including tending to potted plants.
§Irrespective of use of purchased compost.

Main Article

1These authors contributed equally to this article.

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