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Prevalence and diversity of Trichomonas gallinae in meat pigeons (Columba livia) in Guangdong Province, People’s Republic of China

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Abstract

Pigeon farming for meat has developed into an important economic industry in most countries, especially in China. Trichomoniasis, caused by the protozoan parasite Trichomonas gallinae, is a worldwide disease in pigeons. However, studies of the prevalence and distribution of T. gallinae lineages in domestic pigeons in southern China are limited. In this study, a total of 636 pigeon throat swabs samples from four regions in Guangdong Province were screened for T. gallinae by in vitro culture assays and microscopy. The results revealed an overall prevalence of T. gallinae infection in southern China of 26.6% (169/636). There were significant differences in the infection rate of T. gallinae between the four regions (χ2 = 117.948, df = 4, P = 0.000), with up to 44.6% in the Pearl River Delta region. The infection rate of young pigeons was as high as 70.8%. The rDNA sequences (18S rRNA/ITS1-5.8S rRNA-ITS2) of 153 positive samples were amplified and sequenced. Results identified 58.2% (89/153) overall as ITS-A (18S-VI) (also known as ITS-OBT-Tg-1) and 41.8% (64/153) as ITS-B (18S-IV) (also known as ITS-OBT-Tg-2). Thus, ITS-A (18S-VI) was the dominant T. gallinae genotype in southern China, especially in young pigeon (97.0%, 32/33). In conclusion, a high prevalence of T. gallinae infection in domestic pigeons was identified in southern China, particularly in the Pearl River Delta region. The ITS-A (18S-VI) was the dominant genotype highly pathogenic, which may weaken the immune system of pigeons, and cause a negative impact on the development of the pigeon industry in China.

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Data availability

The nucleotide sequence generated in the present study has been deposited in GenBank (https://www.ncbi.nlm.nih.gov/) under accession number ON303479 and ON303472. The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We thank Mallory Eckstut, PhD, from Liwen Bianji (Edanz) (www.liwenbianji.cn), for editing the English text of a draft of this manuscript.

Funding

This work was supported by the Key Realm R&D Program of Guangdong Province (2020B0202080004, 2020B0202090004), NSFC grants (31872460), Guangdong Basic and Applied Basic Research Foundation (2021A1515010521, 2021A1515012401, 2020A1515011575, 2019A1515010913, 2021B1515120006), Science and Technology Plan Projects of Guangdong Province (2021B1212050021), Science and technology project of Heyuan (2021008), Science and technology project of Yunfu (2021040202, 2021020604, 2021020607), Science and technology project of Guangzhou (202102080459), Special fund for scientific innovation strategy-construction of high level Academy of Agriculture Science (202110TD, 202122TD, R2020PY-JC001, R2019YJ-YB3010, R2020PY-JG013, R2020QD-048, R2021PY-QY007). Guangdong Provincial special fund for modern Agriculture Industry Technology Innovation teams (2022KJ119). The Project of Collaborative Innovation Center of GDAAS (XTXM202202).

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Contributions

H.C and L.Y: data collection, writing—original draft, writing—review and editing. Y.Z, Q.Z, Z.Y, N.Q and J.Z: investigation, visualization, writing—review and editing. S.L, J.L, X.L, J.H, S.Y, J.W.L and Z.X: data curation, writing—review and editing. M.S and M.L: conceptualization, data curation, formal analysis, methodology, project administration, supervision, writing—original draft, writing—review and editing. All authors contributed to the article and approved the submitted version.

Corresponding authors

Correspondence to Minna Lv or Mingfei Sun.

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Ethical approval for this study was obtained from the animal care and use Committee of the Institute of animal health, Guangdong Academy of Agricultural Sciences. Informed consent was obtained from all individual participants included in the study.

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The authors declare no competing interests.

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Cai, H., Liu, Y., Zhu, Y. et al. Prevalence and diversity of Trichomonas gallinae in meat pigeons (Columba livia) in Guangdong Province, People’s Republic of China. Parasitol Res 121, 3183–3191 (2022). https://doi.org/10.1007/s00436-022-07640-2

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