CDC EID - MAI 2017 - Au sommaire notamment: No Such Thing as Chronic Q Fever. Author affiliations: French National Referral Center for Q Fever, Marseille, France Highlight and copy the desired format.
Abstract. VETERINARY RESEARCH 05/04/16 Spread of Coxiella burnetii between dairy cattle herds in an enzootic region: modelling contributions of airborne transmission and trade. Our findings showed that airborne transmission and movement of cows both affected the regional spread of C. burnetii, but with different capacities.
On the one hand, airborne transmission had the ability to introduce C. burnetii in a large number of herds, but the generated outbreaks were generally predicted to be ephemeral and small. On the other hand, animal trade was predicted to result in only 8% of new infections; however, purchasing an infectious cow could instigate comparatively larger outbreaks. The differences in the impact of each transmission route on the intra-herd infection dynamics arose from the intrinsic nature of these transmission routes in spreading C. burnetii.
Regardless the route, the first generated local infection was always a cow with health status I − as shown in Figure 2. Such a seronegative shedding cow is a transient shedder, which can become susceptible again. Irrespective of the benefits, mechanistic models are generally difficult to fit to data. WAGENINGEN UNIVERSITY 06/05/14 Land-applied contaminated manure another source of spread of Q fever. Q fever is a zoonosis, an infectious disease that can be transferred from animals to humans.
Previous research had shown that there is a spatial relationship between goat farms that were contaminated with Q fever and the incidence of the illness among humans. As expected more people became ill in the vicinity of contaminated farms that those living at a distance from these farms. “But,” says Alterra researcher Tia Hermans, “we saw that living in the vicinity of goat farms could only explain the Q fever contamination in just over 50% of the cases. So there had to be another factor at play here.” Research carried out by the Central Veterinary Institute showed that manure from goats can still be contaminated with Q fever up to a maximum of 3 months after lambing. Epidemiol. Infect. (2015), 143, 3316–3326. Q fever infection in dairy cattle herds: increased risk with high wind speed and low precipitation. CDC EID - Volume 21, Number 7—July 2015. Chronic Q Fever Diagnosis—Consensus Guideline versus Expert Opinion ;
Kampschreur ( , Marjolijn C.A. Wegdam-Blans, Peter C. Wever, Nicole H.M. Renders, Corine E. Author affiliations: Jeroen Bosch Hospital, ’s-Hertogenbosch, the Netherlands (L.M. Suggested citation for this article Abstract Chronic Q fever, caused by Coxiella burnetii, has high mortality and morbidity rates if left untreated. CDC EID - Volume 21, Number 6—June 2015 - European Rabbits as Reservoir for Coxiella burnetii. Author affiliations: Spanish Wildlife Research Institute, Ciudad Real, Spain (D.
González-Barrio, F. Ruiz-Fons); University of Trás-os-Montes e Alto Douro, Vila Real, Portugal (E. Maio, M. PLOS 15/05/15 The Recent Evolution of a Maternally-Inherited Endosymbiont of Ticks Led to the Emergence of the Q Fever Pathogen, Coxiella burnetii. Abstract Q fever is a highly infectious disease with a worldwide distribution.
Its causative agent, the intracellular bacterium Coxiella burnetii, infects a variety of vertebrate species, including humans. Its evolutionary origin remains almost entirely unknown and uncertainty persists regarding the identity and lifestyle of its ancestors. A few tick species were recently found to harbor maternally-inherited Coxiella-like organisms engaged in symbiotic interactions, but their relationships to the Q fever pathogen remain unclear.
Here, we extensively sampled ticks, identifying new and atypical Coxiella strains from 40 of 58 examined species, and used this data to infer the evolutionary processes leading to the emergence of C. burnetii. Author Summary How virulent infectious diseases emerge from non-pathogenic organisms is a challenging question. Editor: Jason L. Received: January 20, 2015; Accepted: April 17, 2015; Published: May 15, 2015 Copyright: © 2015 Duron et al. Introduction. MICROBIOLOGY AUSTRALIA 18/09/13 Q fever: pets, vets and validating tests. Download PDF Article Published: 18 September 2013 , A C A and B Q fever is a highly significant worldwide zoonosis caused by the bacterium Coxiella burnetii.
While infection is commonly asymptomatic, 40% of primary infections in humans are symptomatic, with serious acute or chronic debilitating illnesses possible, including endocarditis, post-Q fever fatigue syndrome and recrudescent granulomatous lesions in bone or soft tissue1,2. The bacterium itself has a duplicitous lifecycle; a metabolically active form obligately replicates within the macrophage cell lineage while an inactive form has extreme environmental resilience, providing a means to travel to new cells and new hosts. Q fever has been traditionally framed as an occupational disease, associated with contact with cattle, sheep and goats in the livestock and meat industries.
References. INTERDISCIPLINARY PERSPECTIVES ON INFECTIOUS DISEASES - 2012 - Q Fever: An Old but Still a Poorly Understood Disease. International Journal of Microbiology - 2011 - Q Fever: Current State of Knowledge and Perspectives of Research of a Neglected Z. PLOS 07/06/12 Q Fever and Pneumonia in an Area with a High Livestock Density: A Large Population-Based Study. Concerns about public health risks of intensive animal production in the Netherlands continue to rise, in particular related to outbreaks of infectious diseases.
The aim was to investigate associations between the presence of farm animals around the home address and Q fever and pneumonia. Electronic medical record data for the year 2009 of all patients of 27 general practitioners (GPs) in a region with a high density of animal farms were used. Density of farm animals around the home address was calculated using a Geographic Information System. During the study period, a large Q fever outbreak occurred in this region. Associations between farm exposure variables and pneumonia or ‘other infectious disease’, the diagnosis code used by GPs for registration of Q fever, were analyzed in 22,406 children (0–17 y) and 70,142 adults (18–70 y), and adjusted for age and sex. INTECH - AVRIL 2012 - Zoonosis. Au sommaire: Coxiella burnetii. Edited by Jacob Lorenzo-Morales, ISBN 978-953-51-0479-7, 448 pages, Publisher: InTech, Chapters published April 04, 2012 under CC BY 3.0 licenseDOI: 10.5772/2125 Edited Volume Zoonotic diseases are mainly caused by bacterial, viral or parasitic agents although "unconventional agents" such as prions could also be involved in causing zoonotic diseases.
Many of the zoonotic diseases are a public health concern but also affect the production of food of animal origin thus they could cause problems in international trade of animal-origin goods. A major factor contributing to the emergence of new zoonotic pathogens in human populations is increased contact between humans and animals. This book provides an insight on zoonosis and both authors and the editor hope that the work compiled in it would help to raise awareness and interest in this field. It should also help researchers, clinicians and other readers in their research and clinical usage. RIVM 19/12/11 Detection of Coxiella burnetii DNA in animal and environmental matrices on non-dairy sheep farms.
CDC EID – DEC 2011 - Proximity to Goat Farms and Coxiella burnetii Seroprevalence among Pregnant Women. Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options CDC Home CDC 24/7: Saving Lives.
BMC Veterinary Research 2011, 7:13 Q fever abortions in ruminants and associated on-farm risk factors in northern Cyprus. ISBT Science Series - 2011 - XMRV, Q fever and other emerging infections: impact on management of blood safety.