Focusing on the global epidemiology and subtype distribution of sp. in camelids (camels and alpacas), the present systematic review and meta-analysis was conducted. Utilizing relevant keywords, a thorough search was conducted on four electronic databases (PubMed, Scopus, Google Scholar, and Web of Science) with no time constraints up to April 1, 2024. Total estimates and 95% confidence intervals (CIs) were subsequently calculated using a random-effects model. Finally, 11 studies with 18 datasets provided the required data. The global prevalence of sp. in camelids was estimated at 22%, with a 95% CI of 17.2-27.6%. Among 1061 camels, the pooled prevalence of sp. was 21.6% (95% CI: 16.6-27.6%) across 5 countries, which was lower than the 23.5% (95% CI: 12.2-43.1%) found in 449 tested alpacas across 3 countries. Camels were found to carry 15 genetically diverse subtypes (STs) of sp. (ST1-ST7, ST10, ST14, ST15, ST21, ST24, ST25, ST26, and ST30). Among these, ST10 exhibited the highest pooled prevalence [five datasets, 38.3% (95% CI: 22.4-57.1%)], followed by ST1 [three datasets, 24% (95% CI: 6-61.2%)] and ST14 [four datasets, 15.2% (95% CI: 6.7-31%)]. Alpacas exhibited three distinct STs (ST5, ST10, and ST14). Among these, ST10 [four datasets, 50.3% (95% CI: 33.3-67.3%)] had the greatest weighted frequency, with ST14 [four datasets, 40.2% (95% CI: 23.8-59.1%)] following closely behind. Of note, 9 zoonotic STs (ST1-ST7, ST10, and ST14) have been identified in camels and 3 in alpacas (ST5, ST10, and ST14) out of the 16 zoonotic STs (ST1-ST10, ST12, ST14, ST16, ST23, ST35, and ST41) of sp. reported to date. Overall, camelids (camels and alpacas) can serve as a diverse reservoir for various sp. STs, potentially contributing to infections in humans, animals, and water sources. Nevertheless, research in this area is somewhat restricted, necessitating careful interpretation of the findings.
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