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Lethal infection caused by Tetratrichomonas gallinarum in black swans (Cygnus atratus).

Authors :
Feng, Shengyong
Chang, Han
Wang, Yutian
Luo, Fubing
Wu, Qiaoxing
Han, Shuyi
He, Hongxuan
Source :
BMC Veterinary Research. 5/13/2021, Vol. 17 Issue 1, p1-4. 4p.
Publication Year :
2021

Abstract

Background: Tetratrichomonas gallinarum is parasitic protozoa with a wide host range. However, its lethal infection is rare reported. Case presentation: Here, we described the first lethal cases of T. gallinarum infection in black swans in China. Five black swans died within a week in succession without obvious symptoms except mild diarrhea. At necropsy, severe lesions were observed in caeca with thickened caecal walls and hemorrhages in the mucosa. A large number of moving trophozoites were found in the contents of the cecum by microscopic examination. The livers were enlarged with multiple bleeding spots on the surface. Histopathology of the livers showed mononuclear cell infiltration and moderate hyperplasia of fibrous tissue. The histopathology of the cecum showed that the villi of the cecum were edematous. Finally, the presence of T. gallinarum was determined by specific PCR andin-situ hybridization assay. Additionally, common pathogens that can cause similar symptoms were excluded. Conclusions: The death of the black swan was caused by T. gallinarum, suggesting that the parasite might be a new threat to the Cygnus birds. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
17466148
Volume :
17
Issue :
1
Database :
Academic Search Index
Journal :
BMC Veterinary Research
Publication Type :
Academic Journal
Accession number :
150302727
Full Text :
https://doi.org/10.1186/s12917-021-02894-x