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Volume 21, Number 8—August 2015
Research

Differentiation of Acute Q Fever from Other Infections in Patients Presenting to Hospitals, the Netherlands1

Stephan P. KeijmelComments to Author , Elmer Krijger, Corine E. Delsing, Tom Sprong, Marrigje H. Nabuurs-Franssen, and Chantal P. Bleeker-Rovers
Author affiliations: Radboud university medical center, Nijmegen, the Netherlands (S.P. Keijmel, E. Krijger, C.P. Bleeker-Rovers); Medical Spectrum Twente, Enschede, the Netherlands (C.E. Delsing); Canisius Wilhelmina Hospital, Nijmegen (T. Sprong, M.H. Nabuurs-Franssen)

Main Article

Table 5

PCR and serologic results for patients in study group with acute Q fever and control group with negative serologic results for Q fever, the Netherlands*

Characteristic Study group, n  = 82 Control group, n = 52 Day of illness for study group, mean ± SD Day of illness for control group, mean ± SD Sensitivity, %
PCR





First sample 23/41 0/15 8 ± 7 8 ± 7 56
Second sample 1/4 0/1 12 ± 5 30 ± 0 25
ELISA
First sample 20/33 0/18 10 ± 8 7 ± 6 61
Second sample 15/18 0/2 20 ± 11 25 ± 8 83
CFA
First sample 18/81 0/52 9 ± 19 8 ± 6 22
Second sample 27/34 0/28 18 ± 9 20 ± 12 79
Third sample 5/5 0/3 21 ± 6 26 ± 5 100
Culture
Blood† 0/42 (0) 0/40 (0) NA NA NA
Urine† 0/30 (0) 0/37 (0) NA NA NA
Sputum‡ 1/15 (7) 3/22 (14) NA NA NA
Chest radiograph§ 62/79 (78) 28/52 (54) NA NA

*Values are no. positive/no. tested (%) unless otherwise indicated. CFA, complement fixation assay; NA, not applicable.
†Includes only results for first cultures obtained after coming to the hospital.
‡Includes only results for first cultures obtained after coming to the hospital. In the study group, 1 patient was positive for parainfluenza virus. In the control group, 1 patient was positive for Moraxella catarrhalis, 1 patient was positive for Legionella pneumophila, and 1 patient was positive for Streptococcus pneumonia and Staphylococcus aureus.
§Includes only first chest radiographs after coming to the hospital. Values are no. abnormal/no. tested (%).
¶p = 0.003, by χ2 test.

Main Article

1Preliminary results from this study were presented as a poster (P1851) at the 22th annual European Congress of Clinical Microbiology and Infectious Diseases, March 31–April 3, 2012, London, UK.

Page created: July 14, 2015
Page updated: July 14, 2015
Page reviewed: July 14, 2015
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