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Wang C, Li L, Xie Y, Tan Y, Wen Y, Chen Q, Yu J, Song Y, Wu Y. Isolation and Characterization of Avian Chlamydia psittaci from Symptomatic Pet Birds in Southern Hunan, China. Avian Dis 2020; 63:31-37. [PMID: 31251517 DOI: 10.1637/11932-071718-reg.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 11/15/2018] [Indexed: 11/05/2022]
Abstract
Chlamydia psittaci is a zoonotic pathogen with multiple hosts, especially avian, and can be transmitted to humans, causing psittacosis or ornithosis. No effective vaccines have been developed. We therefore isolate and genotype avian C. psittaci strains and investigate the pathogenicity of isolates in the southern Hunan area of China. Among 200 suspicious avian specimens, eight were positive for the C. psittaci outer membrane protein A (ompA) gene (4%), and seven were successfully cultured in human epithelial type 2 and Vero cells (87.5%). Genotyping of the ompA gene of the eight PCR-positive samples revealed that all of the cultured strains, except for the E9 strain, belonged to genotype A. Pathologic changes in the mice infected with C. psittaci via intranasal inoculation showed severe pneumonia and intense infiltration of inflammatory cells in the lung in a dose-dependent manner, and immunohistochemical staining displayed different levels of infiltration of C. psittaci inclusions in the heart, liver, spleen, kidney, and, especially, lung. Our findings demonstrate that genotype A dominates all C. psittaci genotypes in the southern Hunan area and that the C. psittaci avian isolates in this region possess dose-dependent pathogenicity.
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Affiliation(s)
- Chuan Wang
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Li Li
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Yafeng Xie
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Yuan Tan
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Yating Wen
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Qian Chen
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Jian Yu
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China.,Department of Experimental Zoology, Medical College, University of South China, Hengyang 421001, China
| | - Ying Song
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China
| | - Yimou Wu
- Institute of Pathogenic Biology, Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control and Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, China,
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