土耳其黑海地区家猫内脏利什曼原虫的首次分子证据及相关风险因素

First Molecular Evidence of Leishmania Infantum in Domestic Cats and Associated Risk Factors from the Black Sea Region of Türkiye.

机构信息

Department of Internal Medicine, Faculty of Veterinary Medicine, University of Ondokuz Mayis, Samsun, Turkey.

Department of Parasitology, Faculty of Veterinary Medicine, University of Erciyes, Kayseri, Turkey.

出版信息

Acta Parasitol. 2024 Sep;69(3):1547-1554. doi: 10.1007/s11686-024-00885-0. Epub 2024 Aug 20.

Abstract

PURPOSE

The objectives of the present study are to determine the molecular prevalence of Leishmania spp. in the owned domestic cats in the Black Sea Region of Türkiye and analyze the associated risk factors in FeL.

METHODS

Conjunctival swabs (CS), blood, demographic, and clinical data were collected from 150 owned cats brought to the Veterinary Teaching Hospital during 2020-2022. Leishmania kinetoplast DNA (kDNA) from CS was screened by TaqMan Real-Time PCR (qPCR) with the genus-specific primers and a probe.

RESULTS

All qPCR positive products were also amplified and sequenced to identify Leishmania species by ITS1 primers. Molecular prevalence of L. infantum found as 12.6% (19/150) in the observed cats in the Black Sea Region of Türkiye. There was a significant difference (p < 0.05) between neutered and intact cats with regarding to L. infantum positivity. Intact cats found to be 0.368 times more prone to be L. infantum-positive (L+). Dermatological lesions were found the most common (26.3%) problems in the L + cats. The median leucocyte count was the only parameter that was found statistically (p < 0.05) lower in the L + group (6.60) than the negative group (L-) (8.96), when comparing the WBC, NEU/LYM, MONO/LYM, EOS/LYM and PLT/LYM values.

CONCLUSION

This study presented the molecular occurrence of FeL in the Black Sea Region of Türkiye for the first time indicating that the carrier status of the cats makes them alternative reservoirs for possible zoonotic transmission of L. infantum in this zone.

摘要

目的

本研究的目的是确定土耳其黑海地区家养猫中利什曼原虫属的分子流行率,并分析 FeL 中的相关危险因素。

方法

2020 年至 2022 年期间,从兽医教学医院就诊的 150 只家养猫中采集结膜拭子(CS)、血液、人口统计学和临床数据。使用属特异性引物和探针的 TaqMan 实时 PCR(qPCR)筛查 CS 中的利什曼原虫 kinetoplast DNA(kDNA)。

结果

所有 qPCR 阳性产物均通过 ITS1 引物扩增和测序,以鉴定利什曼原虫种。在土耳其黑海地区观察到的猫中,L. infantum 的分子流行率为 12.6%(19/150)。去势和未去势猫之间存在显著差异(p<0.05),与 L. infantum 阳性率有关。未去势猫被发现更容易感染 L. infantum(L+),感染风险为 0.368 倍。皮肤病变是 L+猫最常见(26.3%)的问题。在比较白细胞计数、中性粒细胞/淋巴细胞、单核细胞/淋巴细胞、嗜酸性粒细胞/淋巴细胞和血小板/淋巴细胞值时,仅发现 L+组的白细胞计数中位数(6.60)明显低于阴性组(L-)(8.96)(p<0.05)。

结论

本研究首次在土耳其黑海地区报告了 FeL 的分子发生情况,表明猫的携带状态使它们成为该地区可能发生的利什曼原虫属人畜共患病传播的替代宿主。

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