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Ali A, R.Derar D, A.Mousa H, A.Osman S, Refaai W, I.Almundarij T, A.Al Dubib M, A.Allam S. First report on the isolation of Chlamydia abortus from female dromedary camels with ovarian hydrobursitis. Theriogenology 2022; 191:102-108. [DOI: 10.1016/j.theriogenology.2022.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/12/2022] [Accepted: 07/14/2022] [Indexed: 11/25/2022]
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Ciuria S, Brouwer MSM, de Gier MM, van Zeeland Y, Bossers A, Prähauser B, Schädler J, Hatt JM, Heijne M, Borel N. Chlamydia caviae in Swiss and Dutch Guinea Pigs-Occurrence and Genetic Diversity. Pathogens 2021; 10:pathogens10101230. [PMID: 34684177 PMCID: PMC8539544 DOI: 10.3390/pathogens10101230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/09/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
Chlamydia (C.) caviae is a known pathogen in guinea pigs, causing conjunctivitis, respiratory infections and abortions. Recently, a C. caviae-induced zoonotic link was identified as the etiology of severe community-acquired pneumonia in humans. Here, 784 conjunctival and rectal swabs originating from 260 guinea pigs and 110 rabbits from 64 husbandries in Switzerland, as well as 200 composite conjunctival swabs originating from 878 guinea pigs from 37 husbandries in The Netherlands were examined by real-time PCR followed by conventional PCR and sequencing. Chlamydiaceae were detected in 2.3% (18/784) and 12.5% (25/200) of all Swiss and Dutch samples, respectively. An overall C. caviae occurrence was detected in 2.7% (7/260) and 8.9% (78/878) of all Swiss and Dutch guinea pigs, respectively. OmpA genotyping of 64 C. caviae-positive samples resulted in 33 sequences sharing 100% nucleotide identity with the strains isolated from the zoonotic transmission cases in The Netherlands. However, all ompA sequences of this study were distinct from the C. caviae GPIC reference strain. C. caviae was not detected in rabbits but C. psittaci genotype A was identified in guinea pigs and rabbits, raising concerns about the importance of these animal species as novel zoonotic sources for C. psittaci.
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Affiliation(s)
- Silvia Ciuria
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland; (S.C.); (B.P.)
- Center for Clinical Studies, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland
| | - Michael S. M. Brouwer
- Department of Bacteriology, Host-Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, 8221 RA Lelystad, The Netherlands; (M.S.M.B.); (A.B.); (M.H.)
| | - Marende M. de Gier
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CM Utrecht, The Netherlands; (M.M.d.G.); (Y.v.Z.)
| | - Yvonne van Zeeland
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CM Utrecht, The Netherlands; (M.M.d.G.); (Y.v.Z.)
| | - Alex Bossers
- Department of Bacteriology, Host-Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, 8221 RA Lelystad, The Netherlands; (M.S.M.B.); (A.B.); (M.H.)
| | - Barbara Prähauser
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland; (S.C.); (B.P.)
- Center for Clinical Studies, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland
| | - Julia Schädler
- National Reference Centre for Poultry and Rabbit Diseases, Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland;
| | - Jean-Michel Hatt
- Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland;
| | - Marloes Heijne
- Department of Bacteriology, Host-Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, 8221 RA Lelystad, The Netherlands; (M.S.M.B.); (A.B.); (M.H.)
| | - Nicole Borel
- Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, 8057 Zürich, Switzerland; (S.C.); (B.P.)
- Correspondence: ; Tel.: +41-44-6358563
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Occurrence of Chlamydiaceae and Chlamydia felis pmp9 Typing in Conjunctival and Rectal Samples of Swiss Stray and Pet Cats. Pathogens 2021; 10:pathogens10080951. [PMID: 34451415 PMCID: PMC8400119 DOI: 10.3390/pathogens10080951] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/26/2021] [Accepted: 07/26/2021] [Indexed: 11/29/2022] Open
Abstract
Chlamydia (C.) felis primarily replicates in feline conjunctival epithelial cells and is an important cause of conjunctivitis in cats. Data on C. felis infection rates in stray cats in Switzerland has been missing so far. We performed a qPCR-based Chlamydiaceae-screening on 565 conjunctival and 387 rectal samples from 309 stray and 86 pet cats followed by Chlamydia species identification and C. felis typing using the gene pmp9, which encodes a polymorphic membrane protein. Overall, 19.1% of the stray and 11.6% of the pet cats were Chlamydiaceae-positive with significantly higher rates in cats displaying signs of conjunctivitis (37.1%) compared to healthy animals (6.9%). Rectal shedding of Chlamydiaceae occurred in 25.0% of infected cats and was mostly associated with concurrent ocular positivity (87.5%). In 92.2% of positive conjunctival and rectal samples, the Chlamydia species was identified as C. felis and in 2.6% as C. abortus. The C. felis pmp9 gene was very conserved in the sampled population with only one single-nucleotide polymorphism (SNP) in one conjunctival sample. In conclusion, C. felis strains are circulating in Swiss cats, are associated with conjunctivitis, have a low pmp9 genetic variability, and are rectally shed in about 16% of positive cases.
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