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Study on prevalence of Coxiella burnetti antibodies in bulk milk samples from Austrian sairy herds

Abstract
Coxiella burnetii is the causative agent of Q fever and has zoonotic potential. Knowledge of C. burnetii and its associated diseases has increased tremendously since the disease was first described in Australia (1973). Q fever has a very wide host range (domestic animals, reptiles, ticks, birds, and fish), and the pathogen is transmitted via various excretory routes (birth fluids, milk, urine, faeces) but also dust [Eldin et al., 2017]. Infected animals are often asymptomatic carriers and excretors of the bacterium. Occurring clinical symptoms are mainly related to fertility problems. The most common symptoms are infertility, preterm births, stillbirths, abortions, or mastitis (Knap et al., 2019; Maurin et al., 1999; Niemczuk et al., 2014; Kazar 2005). C. burnetii has zoonotic potential and infections in humans are often associated with contact with ruminants (Gyuranecz et al., 2014; Schimmer at al., 2009). Therefore, it is important to know the infection status of C. burnetii in ruminants and to map the distribution of the pathogen to assess potential risks. Serological testing of tank milk from cattle-keeping farms is suitable for making a statement about the infection status of the herd and for monitoring the herds. To confirm the diagnosis for individual animals, pathogen detection must be performed from test material from individual animals. There is currently very little information on the distribution of Q fever in Austria and in Europe (Knap et al, 2019; Gyuranecz et al, 2012; Debeljak et al, 2018; Serbezov et al, 1999). Therefore, the aim of this study is to investigate the prevalence of antibodies against the pathogen C. burnetii in dairy herds in Austria.Hypotheses:1. antibodies against Coxiella burnetii are also detected in Austrian dairy herds.2. regional differences exist between individual areas3. larger dairy herds show a higher prevalence.
Lemma
Coxiella burnetii-Antik├Ârpern in Tankmilchproben
Project leader
Wittek Thomas
Duration
01.03.22-28.02.24
Type of Research
Clinical research / study
Vetmed Research Units
University Clinic for Ruminants, Clinical Unit of Ruminant Medicine
Funded by
Ceva Tiergesundheit GmbH, D├╝sseldorf, Germany
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