4.5 Article

Identification and distribution of pathogens coinfecting with Brucella spp., Coxiella burnetii and Rift Valley fever virus in humans, livestock and wildlife

Journal

ZOONOSES AND PUBLIC HEALTH
Volume 69, Issue 3, Pages 175-194

Publisher

WILEY
DOI: 10.1111/zph.12905

Keywords

Brucellosis; co-exposure; diagnostics; especially dangerous pathogens; Q fever; Rift Valley fever; serology; zoonotic disease

Funding

  1. US Defense Threat Reduction Agency Biological Threat Reduction Program [R-00716-19-0]

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Zoonotic diseases such as brucellosis, Q fever and Rift Valley fever can have devastating effects on human, livestock, and wildlife health, leading to severe disease outcomes and altered transmission dynamics. Further research is needed on identifying and managing coinfections to improve disease risk management in zoonotic diseases.
Zoonotic diseases, such as brucellosis, Q fever and Rift Valley fever (RVF) caused by Brucella spp., Coxiella burnetii and RVF virus, respectively, can have devastating effects on human, livestock, and wildlife health and cause economic hardship due to morbidity and mortality in livestock. Coinfection with multiple pathogens can lead to more severe disease outcomes and altered transmission dynamics. These three pathogens can alter host immune responses likely leading to increased morbidity, mortality and pathogen transmission during coinfection. Developing countries, such as those commonly afflicted by outbreaks of brucellosis, Q fever and RVF, have high disease burden and thus common coinfections. A literature survey provided information on case reports and studies investigating coinfections involving the three focal diseases. Fifty five studies were collected demonstrating coinfections of Brucella spp., C. burnetii or RVFV with 50 different pathogens, of which 64% were zoonotic. While the literature search criteria involved 'coinfection', only 24/55 studies showed coinfections with direct pathogen detection methods (microbiology, PCR and antigen test), while the rest only reported detection of antibodies against multiple pathogens, which only indicate a history of co-exposure, not concurrent infection. These studies lack the ability to test whether coinfection leads to changes in morbidity, mortality or transmission dynamics. We describe considerations and methods for identifying ongoing coinfections to address this critical blind spot in disease risk management.

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