Abstract
Purpose
Neosporosis is an important widespread parasitic infection caused by N. caninum. It infects a wide range of warm-blooded animals as intermediate hosts and dogs as the definitive host. Nevertheless, there are a number of questions regarding the life cycle and epidemiological aspects of N. caninum. Also, the role of felids (domestic and non-domestic) in the life cycle of N. caninum has been little described. Therefore, this study was conducted to evaluate the global prevalence of N. caninum in domestic and wild felids.
Methods
PubMed, Scopus, Google Scholar, Web of Science, and ScienceDirect databases were searched for articles published on the prevalence of N. caninum in felids until Aprill 2, 2022 and the reference lists of retrieved articles were screened. A random-effects meta-analysis model was used to estimate the pooled prevalence and 95% confidence interval. Heterogeneity among studies was evaluated using Cochran’s Q and the I2 statistic.
Results
After exclusion of irrelevant articles and duplication removal, 30 studies were eligible for quantitative analysis including 20 studies on domestic cats and 10 studies on wild felids. The overall prevalence of neosporosis infection in cats was 15% (95% CI 10–21%) that was significantly higher in wild felids (26%, 95% CI 13–38%) than in domestic cats (11%, 95% CI 6–16%) (P = 0.03). There was no significant difference in pooled prevalence between male and female domestic cats (P = 0.75). Regarding continent, the lowest prevalence of neosporosis infection was in Asia (9%, 95% CI 1–20%) and the highest was in North America (43.6%, 95% CI 33.9–53.2%) and Africa (18%, 95% CI 9–46%). Higher prevalence was obtained when using the NAT with 22% (95% CI 7–37%), compared to the IFAT (17%, 95% CI 9–24%) and ELISA (6%, 95% CI 2–9%) (P = 0.01).
Conclusion
The findings highlighted the importance of felids as potential intermediate hosts of neosporosis despite the fact that the source of the parasite for these animals was unknown. Further studies should be performed to investigate the role of this top predator (felids) in maintaining both domestic and sylvatic cycles of Neospora caninum.
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Availability of Data and Material
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
We thank the scientists and personnel of the Medical Parasitology Department in Kermanshah University of Medical Sciences, Kermanshah, for their collaboration. We also extend our thanks to clinical research development center of Imam Reza Hospital for their kind advice.
Funding
This study was supported by a grant from the Vice Chancellery for Research and Technology, Kermanshah University of Medical Sciences (grant number: 4010418).
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All authors contributed to study design. AB contributed to all parts of the study. NN and SF contributed to study implementation. MTS, MTK, YH, SAK and SR collaborated in the analysis and interpretation of data. SR, and AB collaborated in the manuscript writing and revision. All the authors commented on the drafts of the manuscript and approved the final version of the article.
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The protocol was approved by the Ethics Committee of Kermanshah University of Medical Sciences (IR.KUMS.MED.REC.1401.093).
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Nazari, N., Khodayari, M.T., Hamzavi, Y. et al. Systematic Review and Meta-analysis of Role of Felids as Intermediate Hosts in the Life Cycle of Neospora caninum Based on Serological Data. Acta Parasit. 68, 266–276 (2023). https://doi.org/10.1007/s11686-023-00661-6
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DOI: https://doi.org/10.1007/s11686-023-00661-6