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Volume 7, Number 3—June 2001

Research

Goat-Associated Q Fever: A New Disease in Newfoundland

Todd F. Hatchette*, Robert C. Hudson†, Walter F. Schlech*, Nancy A. Campbell*, Jill E. Hatchette*, Sam Ratnam‡, Didier Raoult§, Catherine Donovan‡, and Thomas J. Marrie¶Comments to Author 
Author affiliations: *Dalhousie University, Halifax, Nova Scotia, Canada; †Newfoundland Department of Forest Resources and Agrifoods, Clarenville, Newfoundland, Canada; ‡Memorial University of Newfoundland, St. John's, Newfoundland, Canada; §Unite des Rickettsies, Marseille, France; ¶University of Alberta, Edmonton, Alberta, Canada

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Table 3

Exposure risks associated with Coxiella burnetii infection in the Newfoundland outbreak

Risk factors Infected no. (%) Noninfected no. (%) Odds ratio (95% CI)
Visited a barn 57/60 (95.0) 63/86 (73.3) 6.94 (1.98-24.34)
Direct contact with goats 54/60 (90.0) 54/86 (62.8) 5.33 (2.06-13.79)
Milking 19/60 (31.7) 3/85 (3.5) 12.67 (3.54-45.29)
Assisting with kidding 29/60 (48.3) 6/85 (7.1) 12.32 (4.66-32.57)
Handling placentaa 31/60 (51.6) 7/86 (8.1) 12.06 (4.79-30.39)
Shoveling manure 37/60 (61.7) 19/84 (22.6) 5.50 (2.65-11.41)
Feeding 39/57 (68.4) 29/85 (34.2) 4.17 (2.06-8.43)
Petting goatsa 52/60 (86.7) 51/85 (60.0) 4.33 (1.83-10.26)
Farmer 8/60 (13.3) 1/85 (1.2) 12.92 (1.57-106.32)
Farm worker 34/60 (56.7) 24/86 (27.9) 3.38 (1.67-6.77)
Household contact, visited farm 13/60 (21.7) 35/85 (41.2) 0.40 (0.19-0.84)
Household contact, no farm visit 2/60 (3.3) 23/85 (27.1) 0.09 (0.02-0.41)
Ate goat cheesea 17/60 (28.3) 6/86 (7.0) 5.27 (1.94-14.35)
Smokeda 36/58 (62.1) 28/84 (33.3) 3.27 (1.63-6.58)
Drank alcohol 37/57 (64.9) 38/84 (45.2) 2.08 (1.04-4.13)
Have liver problems 5/53 (9.4) 2/72 (2.8) 3.65 (0.68-19.57)
Have cats 25/59 (42.4) 30/86 (34.9) 1.37 (0.70-2.71)
Drink goat milk 19/60 (31.7) 27/86 (31.4) 1.01 (0.50-2.06)

aBy logistic regression model, the following were statistically significant: Contact with placenta (p<0.001); smoking history (p=0.001); eating goat cheese (p=0.022); and petting goats (p=0.055).

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