Brucella canis and Chlamydia spp.: insights into canine infections, diagnostics, and potential tick-borne transmission

Abstract

Brucella and Chlamydia spp. are zoonotic pathogens with significant implications for both human and animal health. Brucella species, which is responsible for brucellosis, manifest in a range of clinical symptoms and present substantial zoonotic risks. Though less commonly reported, canine infections with Brucella raise concerns about the potential for transmission to humans and highlight the need for continued vigilance in veterinary settings. Chlamydia spp. is notable for its ability to cause diverse diseases in animals, from mild infections to severe systemic illnesses. In dogs, Chlamydia infections can lead to symptoms such as conjunctivitis, respiratory disorders, and reproductive issues, including infertility and abortion. The zoonotic potential of Chlamydia, particularly Chlamydia felis, emphasises the need for thorough monitoring and control measures in both domestic animals and humans. Ticks play a significant role in the transmission of these pathogens. Research has identified Chlamydia spp. in ticks; however, the exact epidemiological implications remain unclear. Similarly, Brucella has been detected in ticks, but conclusive evidence of tick-borne transmission to humans or between animals is still lacking. Improved diagnostic tools and control strategies are essential for managing the risks associated with Brucella and Chlamydia infections in both animals and humans, with a particular focus on the role of ticks as potential vectors.