Equine chlamydiosis —An emerging infectious disease requiring a one health surveillance approach

Summary Psittacosis is a rare but potentially fatal zoonosis caused by Chlamydia psittaci, an organism that is typically associated with bird contact. However C. psittaci is capable of infecting other non‐avian hosts, such as horses, sheep, cattle and goats. Stud staff and veterinarians have significant exposure to parturient animals and reproductive materials in their routine work. To investigate the zoonotic potential associated with the emergence of C. psittaci as an abortifacient agent in horses, we established a programme of joint human and animal surveillance in a sentinel horse‐breeding region in Australia. This programme comprised cross‐notification of equine cases to public health agencies, and active follow‐up of known human contacts, including stud workers, foaling staff, veterinarians and laboratory staff. We identified no confirmed cases of acute psittacosis despite intensive surveillance and testing of heavily exposed contacts; however, further work in the area is needed.
Source: Zoonoses and Public Health - Category: Infectious Diseases Authors: Tags: SHORT COMMUNICATION Source Type: research

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In this study, we generated two recombinant RABVs, rERAG333E/NiVG and rERAG333E/NiVF, expressing the NiV Malaysian strain attachment glycoprotein (NiV-G) or fusion glycoprotein (NiV-F) gene based on the rERAG333E vector platform. Both rERAG333E/NiVG and rERAG333E/NiVF displayed growth properties similar to those of rERAG333E and caused marked syncytia formation after co-infection in BSR cell culture. Adult and suckling mice intracerebrally inoculated with the recombinant RABVs showed NiV-G and NiV-F expression did not increase the virulence of rERAG333E. Oral vaccination with rERAG333E/NiVG either singularly or combined wi...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
Conclusion: Vulnerable populations were found to be less knowledgeable on risk factors and they had poor practice. Education had significant impact on knowledge and attitude of urban population; however, their practice did not improve with education. PMID: 31815581 [PubMed - as supplied by publisher]
Source: Ocular Immunology and Inflammation - Category: Allergy & Immunology Tags: Ocul Immunol Inflamm Source Type: research
Publication date: Available online 10 December 2019Source: Microvascular ResearchAuthor(s): Mengjiao Liu, Kate Lycett, Melissa Wake, Mingguang He, Jessica A. Kerr, Richard Saffery, Markus Juonala, Tim Olds, Terry Dwyer, David P. Burgner, Tien Yin WongAbstractTraditional retinal microvascular parameters (smaller arteriolar and greater venular caliber) are associated with cardiovascular risk factors, pre-clinical vascular phenotypes and clinical cardiovascular events in adults. Although novel retinal microvascular geometric parameters showed analogous associations in adults, less is known whether these parameters are associa...
Source: Microvascular Research - Category: Biochemistry Source Type: research
In this study, we describe the results of surveillance for psittacid herpesviruses (PsHVs), psittacine adenovirus (PsAdV), BFDV and C. psittaci in wild cacatuids in Victoria, Australia. Samples were collected from 55 birds of four species, and tested using genus or family-wide polymerase chain reaction methods coupled with sequencing and phylogenetic analyses for detection and identification of known and novel pathogens. There were no clinically observed signs of illness in most of the live birds in this study (96.3%; n = 53). Beak and Feather Disease Virus was detected with a prevalence of 69.6% (95% CI 55.2...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
In this study, we describe the detection and molecular characterization of C. psittaci in a case of equine abortion in southern Queensland. Equine placenta and fresh liver and lung tissue from the necropsied foetus were positive by C. psittaci‐specific qPCR. Chlamydia psittaci‐specific multilocus sequence typing and ompA genotyping were used to further characterize the detected equine strains and an additional strain obtained from a dove from a different geographic region presenting with psittacosis. Molecular typing of this case revealed that the infecting equine strains were closely related to the C0sittaci...
Source: Transboundary and Emerging Diseases - Category: Veterinary Research Authors: Tags: SHORT COMMUNICATION Source Type: research
CONCLUSION: Phylogenetic examination of the 14 isolates of C. psittaci identified in the presented study, based on 23S rRNA gene sequence, revealed their close relationship with C. psittaci genotypes B and E. Both genotypes are predominantly prevalent in pigeons and both can be transmitted to humans. Therefore, it is necessary to perform screening examinations of animals and analyse the epidemiological factors affecting the way of transmission and circulation of pathogen. PMID: 27007521 [PubMed - indexed for MEDLINE]
Source: Annals of Agricultural and Environmental Medicine : AAEM - Category: Environmental Health Authors: Tags: Ann Agric Environ Med Source Type: research
Conclusion These data indicate that indirect ELISA with PmpD-N as the antigen candidate is a promising approach for the surveillance of C. psittaci infection.
Source: Biomedical and Environmental Sciences - Category: Biomedical Science Source Type: research
This article is protected by copyright. All rights reserved.
Source: FEBS Letters - Category: Biochemistry Authors: Tags: Review Source Type: research
This article is protected by copyright. All rights reserved.
Source: FEBS Letters - Category: Biochemistry Authors: Tags: Review Source Type: research
CONCLUSION: These data indicate that indirect ELISA with PmpD-N as the antigen candidate is a promising approach for the surveillance of C. psittaci infection. PMID: 27353705 [PubMed - in process]
Source: Biomedical and Environmental Sciences : BES - Category: Biomedical Science Authors: Tags: Biomed Environ Sci Source Type: research
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