AI Article Synopsis
- - The study aimed to assess the prevalence of echinococcosis infection in small mammals in Shiqu County, Sichuan Province, from 2015 to 2020, to aid in control measures for the disease.
- - Over the study period, 2,692 small mammals were captured and examined, revealing a significant decline in infection rates as the years progressed, with higher prevalence detected through visual examinations compared to PCR assays.
- - The findings indicated a trend of decreasing infection rates year by year for both detection methods, suggesting improved control measures for echinococcosis in the region.
Article Abstract
Objective: To investigate the prevalence of infection in small mammals in Shiqu County, Sichuan Province from 2015 to 2020, so as to provide insights into echinococcosis control in Shiqu County.
Methods: One setting with frequent activity of small mammals was sampled as the survey site from each of 9 townships where human alveolar echinococcosis was hyperendemic, in Shiqu County, Sichuan Province from 2015 to 2020. Two quadrats measuring 50 m × 50 m were assigned in each survey site during the period between July and August from 2015 to 2020 to capture all small mammals in quadrats, and the species of small mammals were identified by morphological characteristics. All captured small mammals were dissected in the field and infection was identified by visual examinations. The affected organs of - infected small mammals were collected, and infection was detected using PCR assay, with species characterized. The prevalence of infection was calculated in small mammals, and the trends in the prevalence of infection were analyzed during the period from 2015 to 2020. In addition, the prevalence of infection was compared in small mammals using visual examinations and PCR assay.
Results: A total of 2 692 small mammals were captured in the survey sites of Shiqu County from 2015 to 2020, and morphology characterized 1 360 (50.52%) and 1 332 (49.48%). The prevalence rates of infection were 35.63%, 19.16%, 21.41%, 8.40%, 7.68% and 4.44% by visual examinations and 18.96%, 5.36%, 5.61%, 4.58%, 3.30% and 0.37% by PCR assay in small mammals in Shiqu County from 2015 to 2020, both showing a tendency towards a decline year by year (χ = 215.024 and 117.045, both values < 0.001). The prevalence of infection was significantly higher in small mammals by visual examinations than by PCR assay during the period from 2015 to 2020 except in 2018 (χ= 33.597, 21.815, 51.373, 17.268 and 9.537, all values < 0.01). PCR assay detected a reduction in the prevalence of infection from 10.21% to 0.37% and a reduction in the prevalence of infection from 8.75% to 0 in small mammals in Shiqu County from 2015 to 2020, both appearing a tendency towards a decline year by year (χ = 117.045 and 43.436, both values < 0.001). In addition, the prevalence of and infections reduced from 15.19% to 0.45% and from 8.23% to 0 in , and the prevalence of and infections reduced from 7.76% to 0 and from 9.01% to 0 in in Shiqu County from 2015 to 2020.
Conclusions: and were dominant species of small mammals in Shiqu County, Sichuan Province from 2015 to 2020, and infection was mainly found in and infection mainly found in . The prevalence of infection appeared a tendency towards a decline in both and year by year during the period from 2015 to 2020.
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| http://dx.doi.org/10.16250/j.32.1374.2022089 | DOI Listing |
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