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Volume 32, Number 1—January 2026

Synopsis

Two Cases of Q Fever in Pregnancy, including Management of the Newborn, Australia

Robyn SilcockComments to Author , Robert Horvath, Su May Chew, and Clare Nourse
Author affiliation: Pathology Queensland, Herston, Queensland, Australia (R. Silcock, R. Horvath); Queensland Children’s Hospital, Brisbane, Queensland, Australia (R. Silcock, C. Nourse); University of Queensland, Brisbane (R. Silcock, C. Nourse); Q Fever Interest Group, Brisbane (R. Silcock, R. Horvath, S.M. Chew, C. Nourse); Prince Charles Hospital, Brisbane (R. Horvath); Toowoomba Hospital, Toowoomba, Queensland, Australia (S.M. Chew)

Main Article

Table 2

Serologic and PCR monitoring for case 2 during pregnancy, at delivery, and during the first 9 months postpartum in study of Q fever in pregnancy, including management of the newborn, Australia*

Time Maternal phase 2 IgM Maternal phase 2 IgG (IFA) Maternal phase 1 IgG (IFA) Infant phase 2 IgM (EIA) Infant phase 2 IgG Infant phase 1 IgG Infant blood
PCR		 Maternal blood PCR Breastmilk PCR
3 months preconception
 320
 320
 40
 –
 –
 –
 –
 Detected
 –
8 weeks’ gestation
 80
 160
 160
 –
 –
 –
 –
 Detected
 –
14 weeks’ gestation
 160
 320
 640
 –
 –
 –
 –
 ND
 –
20 weeks’ gestation
 160
 >1,280
 >1,280
 –
 –
 –
 –
 ND
 –
32 weeks’ gestation
 80
 320
 640
 –
 –
 –
 –
 ND
 –
At delivery
 80
 80
 320
 Neg
 320 (IFA)
 80 (IFA)
 ND
 ND
 ND
6 weeks postpartum
 40
 80
 160
 NA
 NA
 NA
 NA
 ND
 ND
4 months postpartum
 80
 80
 80
 Neg
 EIA neg
 EIA neg
 ND
 ND
 ND
6 months postpartum
 80
 80
 160
 Neg
 EIA neg
 EIA neg
 ND
 ND
 ND
9 months postpartum 80 80 320 NA NA NA NA NA NA

*EIA, enzyme immunoassay; IFA, immunofluorescence assay; NA, not available (not tested); ND, not detected; neg, negative; –, not applicable.

Main Article

Page created: December 15, 2025
Page updated: January 27, 2026
Page reviewed: January 27, 2026
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