Ovine-associated Q fever

Epidemiol Infect. 2009 May;137(5):744-51. doi: 10.1017/S0950268808001404. Epub 2008 Oct 8.

Abstract

In Atlantic Canada, the traditional risk factor for acquisition of Q fever infection has been exposure to infected parturient cats or newborn kittens. In this study we describe the first case of Q fever in Nova Scotia acquired as a result of direct exposure to sheep. A serosurvey of the associated flock was undertaken using an indirect immunofluorescence assay (IFA) testing for antibodies to phase I and phase II Coxiella burnetii antigens. This serosurvey revealed that 23 of 46 sheep (50%) were seropositive for the phase II antibody. Four of these sheep had titres of 1:64 including three nursing ewes, one of which had delivered two lambs that died shortly after delivery. Only one ewe had phase I antibodies but had the study's highest phase II antibody titre (1:128). Molecular studies using polymerase chain reaction (PCR) failed to detect C. burnetii DNA in any of the milk specimens.

Publication types

  • Case Reports

MeSH terms

  • Animals
  • Antibodies, Bacterial / blood
  • Coxiella burnetii / isolation & purification*
  • DNA, Bacterial / isolation & purification
  • Female
  • Fluorescent Antibody Technique, Indirect
  • Humans
  • Male
  • Middle Aged
  • Milk / microbiology
  • Nova Scotia
  • Polymerase Chain Reaction
  • Q Fever / transmission*
  • Q Fever / veterinary*
  • Radiography, Thoracic
  • Seroepidemiologic Studies
  • Sheep
  • Sheep Diseases / microbiology*
  • Sheep Diseases / transmission*

Substances

  • Antibodies, Bacterial
  • DNA, Bacterial